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Software Engineer, Crypto Platform
Worldcoin · San Francisco, California, US
$191k–225k
75 days ago
♡
Software Engineer, Crypto Platform
Worldcoin · San Francisco, California, US
$191k–225k
75 days ago
♡
Senior/Staff Mobile Security Engineer
Worldcoin · San Francisco, California, US
$251k–325k
147 days ago
♡
Senior/Staff Mobile Security Engineer
Worldcoin · San Francisco, California, US
$251k–325k
147 days ago
♡
Tech Lead, Device Automation & QA
Worldcoin · San Francisco, California, US
$217k–260k
227 days ago
♡
Tech Lead, Device Automation & QA
Worldcoin · San Francisco, California, US
$217k–260k
227 days ago
♡
Senior Android Framework Engineer
Worldcoin · San Francisco, California, US
$246k–290k
268 days ago
♡
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Software Engineer, Crypto Platform
Worldcoin · San Francisco, California, US
Pay
$191k–225k
Setting
On-site
TOOLS FOR HUMANITY
Software Engineer, Crypto Platform
Location
San Francisco
Employment Type
Full time
Location Type
On-site
Department
Engineering
Overview
Application
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine, highlighted in Fast Company’s Next 5 in Fintech, and explored in a Bloomberg deep dive. The New York Times, Bankless and TechCrunch have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100. Learn more about the newest product launches from our Liftoff event.
About the Team
The Crypto Platform team builds and operates the foundational services that power products interacting with World Chain. The team owns the full transaction lifecycle, including state reads, calldata construction, smart contract interactions, backend execution paths, transaction submission, and the high-availability infrastructure required to process transactions reliably at scale.
The team also maintains event ingestion and indexing pipelines, using Temporal to provide a consistent, resilient source of truth for downstream systems.
Engineers work closely with product teams to ensure wallet features, Mini App integrations, and ERC-4337-based flows remain robust across regions, providers, and failure domains. The team’s mandate also includes broader crypto infrastructure such as RPC load balancing, transaction simulation, security tooling, and multiprovider redundancy.
About the Opportunity
You will work across crypto platform infrastructure, blockchain engineering, and distributed systems, collaborating closely with product engineers, backend teams, protocol engineers, infrastructure, and security. This role requires strong ownership, sound engineering judgment, and a focus on reliability, as your work will underpin mission-critical features across the organization.
About You
You can reason clearly about complex systems and enjoy working on difficult problems. You learn new domains quickly, take ownership of the systems you build, and drive projects to completion. You are comfortable operating in unfamiliar territory, whether that involves understanding a new protocol, diagnosing a distributed systems failure, or designing a more reliable transaction execution path.
You exercise sound engineering judgment and can turn ambiguity into concrete execution plans. You communicate effectively, collaborate well across disciplines, and maintain high standards for reliability, correctness, and security.
Above all, you are curious, driven, and energized by building foundational infrastructure that supports critical product experiences at scale.
Key Responsibilities
Write clean, efficient, and maintainable code in Go, Rust, and TypeScript.
Design and implement highly reliable services for transaction execution, state access, calldata construction, smart contract interaction, and event ingestion.
Build and extend secure indexing and data processing pipelines using Temporal as the orchestration layer.
Develop and maintain smart contracts required by product workflows.
Improve the resilience of blockchain reads and writes through RPC load balancing, failover strategies, multiprovider redundancy, and transaction simulation.
Own features from design through deployment, including technical design, documentation, testing, observability, and operational readiness.
Partner with product engineering, protocol, infrastructure, and security teams to deliver scalable, fault-tolerant onchain systems.
Contribute to monitoring, alerting, incident response, and long-term maintenance of production services.
Help define platform abstractions that make it safer and easier for product teams to build onchain experiences.
Preferred Qualifications
Experience building production backend systems in Go, Rust, or TypeScript.
Experience with distributed systems, reliability engineering, or high-throughput backend services.
Familiarity with Ethereum, EVM-based chains, smart contracts, account abstraction, or ERC-4337.
Experience with event-driven systems, indexing pipelines, or workflow orchestration tools such as Temporal.
Strong debugging skills across service boundaries, external providers, and blockchain infrastructure.
A pragmatic approach to security, correctness, and operational excellence.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $191,000 - $225,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Apply for this Job
Powered by
Privacy PolicySecurityVulnerability Disclosure
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Software Engineer, Crypto Platform
Worldcoin · San Francisco, California, US
Pay
$191k–225k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Liftoff https://world.org/liftoff event.
ABOUT THE TEAM
The Crypto Platform team builds and operates the foundational services that power products interacting with World Chain. The team owns the full transaction lifecycle, including state reads, calldata construction, smart contract interactions, backend execution paths, transaction submission, and the high-availability infrastructure required to process transactions reliably at scale.
The team also maintains event ingestion and indexing pipelines, using Temporal to provide a consistent, resilient source of truth for downstream systems.
Engineers work closely with product teams to ensure wallet features, Mini App integrations, and ERC-4337-based flows remain robust across regions, providers, and failure domains. The team’s mandate also includes broader crypto infrastructure such as RPC load balancing, transaction simulation, security tooling, and multiprovider redundancy.
ABOUT THE OPPORTUNITY
You will work across crypto platform infrastructure, blockchain engineering, and distributed systems, collaborating closely with product engineers, backend teams, protocol engineers, infrastructure, and security. This role requires strong ownership, sound engineering judgment, and a focus on reliability, as your work will underpin mission-critical features across the organization.
About You
You can reason clearly about complex systems and enjoy working on difficult problems. You learn new domains quickly, take ownership of the systems you build, and drive projects to completion. You are comfortable operating in unfamiliar territory, whether that involves understanding a new protocol, diagnosing a distributed systems failure, or designing a more reliable transaction execution path.
You exercise sound engineering judgment and can turn ambiguity into concrete execution plans. You communicate effectively, collaborate well across disciplines, and maintain high standards for reliability, correctness, and security.
Above all, you are curious, driven, and energized by building foundational infrastructure that supports critical product experiences at scale.
KEY RESPONSIBILITIES
Write clean, efficient, and maintainable code in Go, Rust, and TypeScript.
Design and implement highly reliable services for transaction execution, state access, calldata construction, smart contract interaction, and event ingestion.
Build and extend secure indexing and data processing pipelines using Temporal as the orchestration layer.
Develop and maintain smart contracts required by product workflows.
Improve the resilience of blockchain reads and writes through RPC load balancing, failover strategies, multiprovider redundancy, and transaction simulation.
Own features from design through deployment, including technical design, documentation, testing, observability, and operational readiness.
Partner with product engineering, protocol, infrastructure, and security teams to deliver scalable, fault-tolerant onchain systems.
Contribute to monitoring, alerting, incident response, and long-term maintenance of production services.
Help define platform abstractions that make it safer and easier for product teams to build onchain experiences.
PREFERRED QUALIFICATIONS
Experience building production backend systems in Go, Rust, or TypeScript.
Experience with distributed systems, reliability engineering, or high-throughput backend services.
Familiarity with Ethereum, EVM-based chains, smart contracts, account abstraction, or ERC-4337.
Experience with event-driven systems, indexing pipelines, or workflow orchestration tools such as Temporal.
Strong debugging skills across service boundaries, external providers, and blockchain infrastructure.
A pragmatic approach to security, correctness, and operational excellence.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $191,000 - $225,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior/Staff Mobile Security Engineer
Worldcoin · San Francisco, California, US
Pay
$251k–325k
Setting
On-site
TOOLS FOR HUMANITY
Senior/Staff Mobile Security Engineer
Location
San Francisco
Employment Type
Full time
Location Type
On-site
Department
Engineering
Overview
Application
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine, highlighted in Fast Company’s Next 5 in Fintech, and explored in a Bloomberg deep dive. The New York Times, Bankless and TechCrunch have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100. Learn more about the newest product launches from our Liftoff event.
About the Team
The Security team at Tools for Humanity operates at a level far beyond a regular company. Our objective is not just to secure an organization, but to build the trusted, foundational infrastructure for the world's largest identity and financial network. We are a team of over 15 seasoned engineers who are central to the success of the World protocol. We tackle a unique and complex threat landscape that spans state-of-the-art hardware security for the Orb, advanced cryptography including new zero-knowledge proofs, and the security of a global, distributed cloud and mobile ecosystem. Our work is critical to enabling the protocol to scale to billions of users while upholding an unwavering commitment to fail-safe security and privacy.
About the Opportunity
As a Mobile Security Engineer, you will own the security and integrity of the mobile applications at the core of the World protocol World App on Android and iOS used by millions of people worldwide to verify their identity, authenticate with biometrics, and manage digital assets. This is not a consultative role; you will be a hands-on builder, designing and implementing the systems that ensure our mobile clients are trustworthy, tamper-resistant, and resistant to adversarial attack at global scale.
Our mobile threat model is uniquely challenging: the World App must perform privacy-preserving biometric operations (iris and face authentication) on-device, hold cryptographic keys for identity proofs, and interact with hardware attestation systems all while operating in environments where adversaries range from casual fraud to nation-state-level identity fabrication at scale. You will be the expert who ensures this stack cannot be subverted.
You will:
Design, build, and operate mobile device attestation and integrity verification systems across Android and iOS including hardware-backed key attestation (Android KeyStore TEE/StrongBox, Apple App Attest/Secure Enclave), ensuring requests originate from genuine, untampered devices running unmodified app code.
Engineer anti-tampering, anti-hooking, and runtime integrity protections for the World App, making the app resilient against reverse engineering, instrumentation frameworks (Frida, Xposed), and repackaging attacks.
Own the mobile hardening strategy end-to-end: certificate pinning, secure storage, obfuscation, jailbreak/root detection, debugger detection, and screen capture protection deciding which protections to build in-house and which to source from vendors.
Design cryptographic protocols for on-device biometric authentication (Face Auth, selfie verification) that are resistant to replay, relay, and deepfake injection attacks, ensuring the biometric pipeline cannot be manipulated even on a compromised device.
Build and maintain the server-side attestation verification infrastructure (our Attestation Gateway) that validates Play Integrity tokens, hardware attestation certificate chains, and Apple App Attest assertions, making trust decisions that gate access to sensitive operations.
Lead threat modeling for mobile-specific attack surfaces: biometric bypass, key extraction, device cloning, session hijacking, overlay attacks, accessibility abuse, and automated bot farms using real devices.
Embed security into the mobile development lifecycle performing deep code reviews of Android (Kotlin) and iOS (Swift) code, building automated security checks into CI/CD, and establishing secure coding standards for mobile teams.
Mature our vulnerability management process for mobile, from triaging mobile-specific bug bounty submissions to driving remediation with mobile engineering teams.
Evaluate, integrate, and manage mobile security tooling and vendor relationships (RASP, SAST for mobile, binary analysis tools).
About You
You are a deeply technical mobile security engineer who has spent years protecting high-value mobile applications against sophisticated adversaries. You have a builder's mindset; you don't just find problems, you ship solutions. You've been responsible for the security of mobile apps where the stakes are real: payments, identity, or financial services at scale.
Required:
8+ years of hands-on experience in mobile security engineering, with deep expertise in at least one of Android or iOS (strong in both is ideal).
Proven experience designing and operating mobile device attestation systems you understand Android Hardware Key Attestation (KeyMint, TEE, StrongBox, attestation certificate chains, Google root CA verification), Google Play Integrity API (Classic and Standard modes), and/or Apple App Attest (DeviceCheck, attestation/assertion flows, Secure Enclave) at a systems level, not just as an API consumer.
Strong background in mobile application hardening: you have implemented or evaluated anti-tampering, anti-hooking, root/jailbreak detection, debugger detection, certificate pinning, and runtime integrity protection in production apps.
Experience with mobile reverse engineering and offensive security: you can decompile APKs (jadx, apktool), analyze iOS binaries, use Frida/Objection for dynamic analysis, and think like an attacker to validate your defenses.
Proficiency in Kotlin/Java (Android) and/or Swift (iOS) for security-focused code review and building security libraries.
Experience securing on-device cryptographic operations: key generation, secure storage (Android KeyStore, iOS Keychain), and protocols that depend on hardware-backed keys.
Strong understanding of mobile-specific attack vectors: overlay attacks, accessibility service abuse, screen recording, deepfake injection into camera pipelines, biometric bypass, and app cloning.
Nice to have:
Experience building or operating server-side attestation verification services (decrypting Play Integrity JWE/JWS tokens, validating X.509 attestation certificate chains, managing Apple App Attest key lifecycle in a backend).
Experience with RASP vendor evaluation and integration (Zimperium, Guardsquare/DexGuard, Promon, Appdome).
Background in payment security or PCI-compliant mobile applications (SoftPOS, Tap-to-Pay, EMV).
Familiarity with privacy-preserving systems: zero-knowledge proofs, on-device biometric processing, or differential privacy.
Experience scaling a Secure SDLC or security champions program for mobile engineering teams.
Contributions to mobile security research, conference talks, or open-source security tooling.
Rust, Go, or Python experience for backend security tooling and infrastructure.
What we offer
The reasonably estimated salary for this role at Tools for Humanity ranges from $251,000 - $325,000 plus a competitive long-term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, Tools for Humanity offers a wide range of best-in-class, comprehensive, and inclusive employee benefits for this role, including healthcare, dental, vision, 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend, and much more.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
If you don't think you meet all of the criteria but are still interested in the job, please apply. Nobody checks every box, and we're looking for someone excited to join the team.
Apply for this Job
Powered by
Privacy PolicySecurityVulnerability Disclosure
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior/Staff Mobile Security Engineer
Worldcoin · San Francisco, California, US
Pay
$251k–325k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Liftoff https://world.org/liftoff event.
ABOUT THE TEAM
The Security team at Tools for Humanity operates at a level far beyond a regular company. Our objective is not just to secure an organization, but to build the trusted, foundational infrastructure for the world's largest identity and financial network. We are a team of over 15 seasoned engineers who are central to the success of the World https://whitepaper.world.org/ protocol. We tackle a unique and complex threat landscape https://world.org/tech-tree that spans state-of-the-art hardware security for the Orb, advanced cryptography including new zero-knowledge proofs, and the security of a global, distributed cloud and mobile ecosystem. Our work is critical to enabling the protocol to scale to billions of users while upholding an unwavering commitment to fail-safe security and privacy.
ABOUT THE OPPORTUNITY
As a Mobile Security Engineer, you will own the security and integrity of the mobile applications at the core of the World protocol World App on Android and iOS used by millions of people worldwide to verify their identity, authenticate with biometrics, and manage digital assets. This is not a consultative role; you will be a hands-on builder, designing and implementing the systems that ensure our mobile clients are trustworthy, tamper-resistant, and resistant to adversarial attack at global scale.
Our mobile threat model is uniquely challenging: the World App must perform privacy-preserving biometric operations (iris and face authentication) on-device, hold cryptographic keys for identity proofs, and interact with hardware attestation systems all while operating in environments where adversaries range from casual fraud to nation-state-level identity fabrication at scale. You will be the expert who ensures this stack cannot be subverted.
You will:
- Design, build, and operate mobile device attestation and integrity verification systems across Android and iOS including hardware-backed key attestation (Android KeyStore TEE/StrongBox, Apple App Attest/Secure Enclave), ensuring requests originate from genuine, untampered devices running unmodified app code.
- Engineer anti-tampering, anti-hooking, and runtime integrity protections for the World App, making the app resilient against reverse engineering, instrumentation frameworks (Frida, Xposed), and repackaging attacks.
- Own the mobile hardening strategy end-to-end: certificate pinning, secure storage, obfuscation, jailbreak/root detection, debugger detection, and screen capture protection deciding which protections to build in-house and which to source from vendors.
- Design cryptographic protocols for on-device biometric authentication (Face Auth, selfie verification) that are resistant to replay, relay, and deepfake injection attacks, ensuring the biometric pipeline cannot be manipulated even on a compromised device.
- Build and maintain the server-side attestation verification infrastructure (our Attestation Gateway) that validates Play Integrity tokens, hardware attestation certificate chains, and Apple App Attest assertions, making trust decisions that gate access to sensitive operations.
- Lead threat modeling for mobile-specific attack surfaces: biometric bypass, key extraction, device cloning, session hijacking, overlay attacks, accessibility abuse, and automated bot farms using real devices.
- Embed security into the mobile development lifecycle performing deep code reviews of Android (Kotlin) and iOS (Swift) code, building automated security checks into CI/CD, and establishing secure coding standards for mobile teams.
- Mature our vulnerability management process for mobile, from triaging mobile-specific bug bounty submissions to driving remediation with mobile engineering teams.
- Evaluate, integrate, and manage mobile security tooling and vendor relationships (RASP, SAST for mobile, binary analysis tools).
ABOUT YOU
You are a deeply technical mobile security engineer who has spent years protecting high-value mobile applications against sophisticated adversaries. You have a builder's mindset; you don't just find problems, you ship solutions. You've been responsible for the security of mobile apps where the stakes are real: payments, identity, or financial services at scale.
Required:
- 8+ years of hands-on experience in mobile security engineering, with deep expertise in at least one of Android or iOS (strong in both is ideal).
- Proven experience designing and operating mobile device attestation systems you understand Android Hardware Key Attestation (KeyMint, TEE, StrongBox, attestation certificate chains, Google root CA verification), Google Play Integrity API (Classic and Standard modes), and/or Apple App Attest (DeviceCheck, attestation/assertion flows, Secure Enclave) at a systems level, not just as an API consumer.
- Strong background in mobile application hardening: you have implemented or evaluated anti-tampering, anti-hooking, root/jailbreak detection, debugger detection, certificate pinning, and runtime integrity protection in production apps.
- Experience with mobile reverse engineering and offensive security: you can decompile APKs (jadx, apktool), analyze iOS binaries, use Frida/Objection for dynamic analysis, and think like an attacker to validate your defenses.
- Proficiency in Kotlin/Java (Android) and/or Swift (iOS) for security-focused code review and building security libraries.
- Experience securing on-device cryptographic operations: key generation, secure storage (Android KeyStore, iOS Keychain), and protocols that depend on hardware-backed keys.
- Strong understanding of mobile-specific attack vectors: overlay attacks, accessibility service abuse, screen recording, deepfake injection into camera pipelines, biometric bypass, and app cloning.
Nice to have:
- Experience building or operating server-side attestation verification services (decrypting Play Integrity JWE/JWS tokens, validating X.509 attestation certificate chains, managing Apple App Attest key lifecycle in a backend).
- Experience with RASP vendor evaluation and integration (Zimperium, Guardsquare/DexGuard, Promon, Appdome).
- Background in payment security or PCI-compliant mobile applications (SoftPOS, Tap-to-Pay, EMV).
- Familiarity with privacy-preserving systems: zero-knowledge proofs, on-device biometric processing, or differential privacy.
- Experience scaling a Secure SDLC or security champions program for mobile engineering teams.
- Contributions to mobile security research, conference talks, or open-source security tooling.
- Rust, Go, or Python experience for backend security tooling and infrastructure.
WHAT WE OFFER
The reasonably estimated salary for this role at Tools for Humanity ranges from $251,000 - $325,000 plus a competitive long-term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, Tools for Humanity offers a wide range of best-in-class, comprehensive, and inclusive employee benefits for this role, including healthcare, dental, vision, 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend, and much more.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
If you don't think you meet all of the criteria but are still interested in the job, please apply. Nobody checks every box, and we're looking for someone excited to join the team.
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Tech Lead, Device Automation & QA
Worldcoin · San Francisco, California, US
Pay
$217k–260k
Setting
On-site
TOOLS FOR HUMANITY
Tech Lead, Device Automation & QA
Location
San Francisco
Employment Type
Full time
Location Type
On-site
Department
Device
Overview
Application
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine, highlighted in Fast Company’s Next 5 in Fintech, and explored in a Bloomberg deep dive. The New York Times, Bankless and TechCrunch have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100. Learn more about the newest product launches from our Liftoff event.
About the team
The Device Software team develops the magical experiences that enable the missions of TFH. We are passionate about making great products. We own problems end-to-end and are able to lead cross-functional teams when needed. We love to collaborate but are not afraid to make decisions. We value open communication and are not afraid to fail - we see the value in learning quickly more than making a perfect decision. We really enjoy working with each other and only bring on the best talent.
About the role
We are looking for a Device Automation & QA Lead to own software quality end-to-end for our device platforms. This role is the final quality gate for device software releases and operates alongside but independently from product development teams, with clear accountability for release readiness, test coverage, and test fleet health.
You will design, build, and operate a scalable automated test infrastructure spanning devices, hardware-in-the-loop (HIL), backend services, and CI/CD systems. Your work will directly enable faster development cycles, higher release confidence, and fewer issues reaching the field.
You will write and review test code, design test architectures, interact directly with hardware, and set the quality bar for multiple device product lines. Over time, this role will define how quality scales as our device portfolio, team size, and system complexity grow.
In this role, you will:
Own the automation and QA strategy for Device Software, serving as the independent verification and final release gate for all device releases
Recruit and hire top talent to the QA team that will be able to be self-sufficient within the realms of software, hardware and fleet management
Act as the build and release manager including release scheduling, readiness reviews, and release notes
Design, implement, and evolve a large-scale automated test fleet, including test devices, test stations, and custom HIL systems
Architect and operate test infrastructure spanning:
Devices (Orb and future products)
Test stations that interact with devices like a human would
Backend services, CI/CD pipelines, and fleet management tooling
Designing and automating regression, smoke, and nightly test workflows
Define quality benchmarks and test strategies in partnership with project leads for new products and features
Enable scalable fleet operations, including:
Automated test deployment and updates
CI-triggered test execution
Monitoring and troubleshooting of test failures
Investigate and reproduce field issues, acting as first-line triage before handing off to firmware, software, hardware, and backend teams
Continuously improve test coverage, execution speed, and system reliability, including negative and fault-injection testing
You might thrive in this role if you have:
Are deeply hands-on with software and hardware, comfortable debugging real devices, test rigs, and electrical signals
Have designed or owned automation systems at scale, including fleets of test devices
Write and review high-quality test code and enjoy building reusable, maintainable test frameworks and libraries
Can read production firmware and software code to understand system behavior and translate that understanding into targeted tests
Are naturally curious and proactive— you dig for bugs, edge cases, and failure modes others miss. A human fuzz tester
Are comfortable setting direction with ambiguity and do not require detailed test instructions to get started
Lead with collaboration and low ego, earning trust by delivering value
Think in systems—anticipating future bottlenecks in testing, release processes, and infrastructure before they become problems
Are not afraid to break things in the name of learning, validation, and quality
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH in San Francisco ranges from $217,000 - $260,000, plus a competitive long term incentive package, and may include variable compensation. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision and mental health benefits, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Apply for this Job
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Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Tech Lead, Device Automation & QA
Worldcoin · San Francisco, California, US
Pay
$217k–260k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Liftoff https://world.org/liftoff event.
About the team
The Device Software team develops the magical experiences that enable the missions of TFH. We are passionate about making great products. We own problems end-to-end and are able to lead cross-functional teams when needed. We love to collaborate but are not afraid to make decisions. We value open communication and are not afraid to fail - we see the value in learning quickly more than making a perfect decision. We really enjoy working with each other and only bring on the best talent.
About the role
We are looking for a Device Automation & QA Lead to own software quality end-to-end for our device platforms. This role is the final quality gate for device software releases and operates alongside but independently from product development teams, with clear accountability for release readiness, test coverage, and test fleet health.
You will design, build, and operate a scalable automated test infrastructure spanning devices, hardware-in-the-loop (HIL), backend services, and CI/CD systems. Your work will directly enable faster development cycles, higher release confidence, and fewer issues reaching the field.
You will write and review test code, design test architectures, interact directly with hardware, and set the quality bar for multiple device product lines. Over time, this role will define how quality scales as our device portfolio, team size, and system complexity grow.
In this role, you will:
- Own the automation and QA strategy for Device Software, serving as the independent verification and final release gate for all device releases
- Recruit and hire top talent to the QA team that will be able to be self-sufficient within the realms of software, hardware and fleet management
- Act as the build and release manager including release scheduling, readiness reviews, and release notes
- Design, implement, and evolve a large-scale automated test fleet, including test devices, test stations, and custom HIL systems
- Architect and operate test infrastructure spanning:
- Devices (Orb and future products)
- Test stations that interact with devices like a human would
- Backend services, CI/CD pipelines, and fleet management tooling
- Designing and automating regression, smoke, and nightly test workflows
- Define quality benchmarks and test strategies in partnership with project leads for new products and features
- Enable scalable fleet operations, including:
- Automated test deployment and updates
- CI-triggered test execution
- Monitoring and troubleshooting of test failures
- Investigate and reproduce field issues, acting as first-line triage before handing off to firmware, software, hardware, and backend teams
- Continuously improve test coverage, execution speed, and system reliability, including negative and fault-injection testing
You might thrive in this role if you have:
- Are deeply hands-on with software and hardware, comfortable debugging real devices, test rigs, and electrical signals
- Have designed or owned automation systems at scale, including fleets of test devices
- Write and review high-quality test code and enjoy building reusable, maintainable test frameworks and libraries
- Can read production firmware and software code to understand system behavior and translate that understanding into targeted tests
- Are naturally curious and proactive— you dig for bugs, edge cases, and failure modes others miss. A human fuzz tester
- Are comfortable setting direction with ambiguity and do not require detailed test instructions to get started
- Lead with collaboration and low ego, earning trust by delivering value
- Think in systems—anticipating future bottlenecks in testing, release processes, and infrastructure before they become problems
- Are not afraid to break things in the name of learning, validation, and quality
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH in San Francisco ranges from $217,000 - $260,000, plus a competitive long term incentive package, and may include variable compensation. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision and mental health benefits, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Android Framework Engineer
Worldcoin · San Francisco, California, US
Pay
$246k–290k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of , highlighted in Next 5 in Fintech, and explored in a . , and have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the . Learn more about the newest product launches from our event.
About the Team:
The Device Organization at Tools for Humanity is responsible for all aspects of driving development of world-class hardware devices reaching billions of people globally. We are a rapidly growing, highly cross-functional team that strategically partners with industrial design, optics, hardware development, and product teams to define product requirements and execute on development of our next generation family of devices. We offer competitive compensation, professional development opportunities, and a collaborative work environment.
About the Role:
Tools for Humanity is looking for a Senior Software Development Engineer to join as one of our first device software engineers at our new San Francisco office. This is a great opportunity to join a newly formed, dynamic team and contribute to the full stack development of our next generation proof of human devices.
Key Responsibilities:
Design, implement, and maintain embedded Linux and Android system components, including kernel modules, init scripts, and system daemons.
Develop and extend AOSP and custom HALs and in to support new hardware features and platform services.
Work to define robust communication interfaces between system components.
Manage entire software development lifecycle from concept to production with a focus on developing scalable systems
Serve as an interface between firmware/hardware teams and Android application teams
Collaborate with cross-functional teams (hardware, software, product) to optimize system performance with a clear understanding of UX and customer needs
Supporting overseas development with JDM/ODM partners
Integrate and optimize low-level drivers and middleware for performance, reliability, and power efficiency.
Mentor junior engineers in development best practices
About You:
Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, or related field
7+ years of hands-on experience in software development, with a strong understanding of all levels of the software stack
Experience working with Android and AOSP based platforms
Experience developing and maintaining consumer electronics systems at large scale
Strong proficiency in C/C++/Rust and experience with Linux kernel and user-space programming
Have shipped high volume mobile Android based devices
Deep understanding of AOSP internals, HAL framework, and Android system bring-up
Experience implementing custom HALs and IPC interfaces (Binder, HIDL, AIDL, or similar)
Experience working with cross-compilation toolchains, device trees, and hardware abstraction layers
Comfortable working in a start-up or high-velocity team environment, with a proactive, hands-on approach
Nice-to-Haves:
Familiarity with Yocto, Buildroot, or Android build systems
Hands-on experience with embedded Linux, BSP development, and system integration
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $246,500 - $290,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Android Framework Engineer
Worldcoin · San Francisco, California, US
Pay
$246k–290k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Liftoff https://world.org/liftoff event.
About the Team:
The Device Organization at Tools for Humanity is responsible for all aspects of driving development of world-class hardware devices reaching billions of people globally. We are a rapidly growing, highly cross-functional team that strategically partners with industrial design, optics, hardware development, and product teams to define product requirements and execute on development of our next generation family of devices. We offer competitive compensation, professional development opportunities, and a collaborative work environment.
About the Role:
Tools for Humanity is looking for a Senior Software Development Engineer to join as one of our first device software engineers at our new San Francisco office. This is a great opportunity to join a newly formed, dynamic team and contribute to the full stack development of our next generation proof of human devices.
Key Responsibilities:
- Design, implement, and maintain embedded Linux and Android system components, including kernel modules, init scripts, and system daemons.
- Develop and extend AOSP and custom HALs and in to support new hardware features and platform services.
- Work to define robust communication interfaces between system components.
- Manage entire software development lifecycle from concept to production with a focus on developing scalable systems
- Serve as an interface between firmware/hardware teams and Android application teams
- Collaborate with cross-functional teams (hardware, software, product) to optimize system performance with a clear understanding of UX and customer needs
- Supporting overseas development with JDM/ODM partners
- Integrate and optimize low-level drivers and middleware for performance, reliability, and power efficiency.
- Mentor junior engineers in development best practices
About You:
- Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, or related field
- 7+ years of hands-on experience in software development, with a strong understanding of all levels of the software stack
- Experience working with Android and AOSP based platforms
- Experience developing and maintaining consumer electronics systems at large scale
- Strong proficiency in C/C++/Rust and experience with Linux kernel and user-space programming
- Have shipped high volume mobile Android based devices
- Deep understanding of AOSP internals, HAL framework, and Android system bring-up
- Experience implementing custom HALs and IPC interfaces (Binder, HIDL, AIDL, or similar)
-
- Experience working with cross-compilation toolchains, device trees, and hardware abstraction layers
- Comfortable working in a start-up or high-velocity team environment, with a proactive, hands-on approach
Nice-to-Haves:
- Familiarity with Yocto, Buildroot, or Android build systems
- Hands-on experience with embedded Linux, BSP development, and system integration
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $246,500 - $290,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Staff Backend Engineer
Worldcoin · San Francisco, California, US
Pay
$226k–265k
Setting
On-site
TOOLS FOR HUMANITY
Staff Backend Engineer
Location
San Francisco
Employment Type
Full time
Location Type
On-site
Department
Engineering
Overview
Application
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine, highlighted in Fast Company’s Next 5 in Fintech, and explored in a Bloomberg deep dive. The New York Times, Bankless and TechCrunch have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100. Learn more about the newest product launches from our Liftoff event.
About the Team:
World ID is a digital identity system and proof of humanity for everyone, designed to be a foundational identity protocol for the internet in the era of AGI. It is built to be self-custodial, secure, decentralized and open, setting new standards for privacy and transparency.
At the heart of World ID are groundbreaking innovations in hardware and software—spanning distributed systems, cryptography, sensors, biometrics, machine learning and blockchain technology.
As part of the team behind World ID, you’ll work on defining and building the decentralized platform that underlies World ID, product experiences and partner integrations. You'll help shape the future of technologies needed to realize this ambitious vision.
About the Opportunity:
As a Staff Software Engineer, you will focus on building core technologies and infrastructure to drive scale, utility and decentralization for World ID protocol and its ecosystem.
Your work will span critical technology areas including issuance and registration of credentials, decentralized cloud platform for applications and authenticators lifecycle using MPC systems and blockchain, zero-knowledge proving systems, biometric verification and recovery systems, World network integration platforms and building products using technologies that would delight users.
Your responsibilities include:
Architecting and Building: You will take ownership of the design, development, and scaling for mission-critical software, including architecting decentralized, privacy preserving, secure, scalable and reliable backend systems.
Technical Leadership: You will provide technical guidance to the engineering team and lead complex, cross-functional projects. Your work will ensure the team delivers elegant and effective solutions for a variety of novel challenges some of which have never been done before.
Mentorship and Collaboration: You will mentor junior engineers and work closely with senior leadership, product managers and other XFN stakeholders to deliver impactful solutions that advance the World network.
Strategic Impact: You will play a key role in shaping the technical roadmap and strategy for the World ID platform. You are expected to identify the most important tasks and drive them to completion. Your ability to collaborate and stay organized in a fast-paced environment is key.
About you:
You have a proven track record of designing and developing exceptional backend systems and solving complex problems, preferably with experience in distributed systems or identity management platforms. You are a fast learner who can quickly master and apply new knowledge and skills. You can communicate clearly and concisely, and your colleagues consistently vouch for your ability to collaborate effectively in ambiguous and changing environments. You are great at building software and are motivated by the challenge of realizing this ambitious vision.
Requirements for this role
Experience in senior technical leadership positions.
Proven experience leading complex initiatives from start to finish.
Demonstrated ability to mentor and guide engineering teams to help them level up and increase their impact.
Deep expertise in designing and implementing software systems that are both reliable and scalable, with a strong grasp of fundamentals.
Excellent communication skills, both written and verbal, for technical and non-technical audiences.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $225,500 - $265,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Apply for this Job
Powered by
Privacy PolicySecurityVulnerability Disclosure
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
Staff Backend Engineer
Worldcoin · San Francisco, California, US
Pay
$226k–265k
Setting
On-site
About the Company:
Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet.
World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate.
Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI.
TFH and World have been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Liftoff https://world.org/liftoff event.
ABOUT THE TEAM:
World ID https://docs.worldcoin.org/ is a digital identity system and proof of humanity for everyone, designed to be a foundational identity protocol for the internet in the era of AGI. It is built to be self-custodial, secure, decentralized and open, setting new standards for privacy and transparency.
At the heart of World ID are groundbreaking innovations in hardware and software—spanning distributed systems, cryptography, sensors, biometrics, machine learning and blockchain technology.
As part of the team behind World ID, you’ll work on defining and building the decentralized platform that underlies World ID, product experiences and partner integrations. You'll help shape the future of technologies needed to realize this ambitious vision.
About the Opportunity:
As a Staff Software Engineer, you will focus on building core technologies and infrastructure to drive scale, utility and decentralization for World ID protocol and its ecosystem.
Your work will span critical technology areas including issuance and registration of credentials, decentralized cloud platform for applications and authenticators lifecycle using MPC systems and blockchain, zero-knowledge proving systems, biometric verification and recovery systems, World network integration platforms and building products using technologies that would delight users.
Your responsibilities include:
- Architecting and Building: You will take ownership of the design, development, and scaling for mission-critical software, including architecting decentralized, privacy preserving, secure, scalable and reliable backend systems.
- Technical Leadership: You will provide technical guidance to the engineering team and lead complex, cross-functional projects. Your work will ensure the team delivers elegant and effective solutions for a variety of novel challenges some of which have never been done before.
- Mentorship and Collaboration: You will mentor junior engineers and work closely with senior leadership, product managers and other XFN stakeholders to deliver impactful solutions that advance the World network.
- Strategic Impact: You will play a key role in shaping the technical roadmap and strategy for the World ID platform. You are expected to identify the most important tasks and drive them to completion. Your ability to collaborate and stay organized in a fast-paced environment is key.
ABOUT YOU:
You have a proven track record of designing and developing exceptional backend systems and solving complex problems, preferably with experience in distributed systems or identity management platforms. You are a fast learner who can quickly master and apply new knowledge and skills. You can communicate clearly and concisely, and your colleagues consistently vouch for your ability to collaborate effectively in ambiguous and changing environments. You are great at building software and are motivated by the challenge of realizing this ambitious vision.
Requirements for this role
- Experience in senior technical leadership positions.
- Proven experience leading complex initiatives from start to finish.
- Demonstrated ability to mentor and guide engineering teams to help them level up and increase their impact.
- Deep expertise in designing and implementing software systems that are both reliable and scalable, with a strong grasp of fundamentals.
- Excellent communication skills, both written and verbal, for technical and non-technical audiences.
By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.
Pay transparency statement (for CA and NY based roles):
The reasonably estimated salary for this role at TFH ranges from $225,500 - $265,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Listed by Worldcoin for a position based in the United States. Employers on this board attest they are hiring domestically.
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