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Senior Software Engineer - Backend
Harmonic · New York City, New York, United States
$180k–220k
28 days ago
♡
Staff Software Engineer - Search
Harmonic · New York City, New York, United States
$210k–280k
34 days ago
♡
Senior Software Engineer - Full Stack
Harmonic · New York City, New York, United States
$180k–220k
34 days ago
♡
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Senior Software Engineer - Backend
Harmonic · New York City, New York, United States
Pay
$180k–220k
Setting
Hybrid
ABOUT US
Harmonic is the startup discovery engine.
It pains us to see great startup opportunities consistently go unfunded not because of lack of talent, but lack of signal.
We're fixing that by mapping the entire startup landscape and building the tools that put the right companies in front of the right people at the right time. Investors, corporate development, and GTM teams use us to find breakout companies before they're obvious and turn that discovery into action. Whether that's a check, an acquisition, partnership or won business.
We’re growing revenue at a rate of 100%+ annually, backed by $30M from Craft, Floodgate, and Sozo Ventures. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matters most flourish. If that resonates, let's talk.
About the Team
This team sits at the epicenter of everything Harmonic builds. We ingest, reconcile, and continuously improve the data that underpins how we understand startups, people, and investors: funding activity, company data, and people data, three areas the business depends on more with every new market we enter.
We're not just pipeline builders. When new data needs a home in the product, whether that's a new field in the console or an entirely new surface, this team builds it. Real ownership over both the data and the product it becomes: that's what makes this team exciting.
Who You Are
- You have 6+ years of experience as a software engineer and a track record of building data infrastructure at scale, ideally somewhere that was growing fast enough to break things.
- You have real product sense. You can reason about what data is actually worth extracting, how it should be structured and served, and how someone will use it once it's in front of them.
- You think in systems. You've designed data models, picked indexing strategies, and built serving paths that hold up under both load and a user's patience.
- You want to build product, not just plumbing. Shipping a feature should excite you as much as the infrastructure underneath it, and you think about the customer first, not the schema.
- You've spent real time wrangling raw, messy, real-world data into something structured and reliable, whether you came up through data engineering or full-stack.
- Bonus points if you've worked with LLM-powered extraction, search systems, or agentic workflows, or spent time around venture capital, private markets, or company intelligence data.
What You'll Do
- Architect and run the large-scale pipelines that power how Harmonic understands startups, people, and investments.
- Own our data quality bar (coverage, freshness, accuracy) and go find the new sources and ingestion techniques that raise it.
- Keep pushing our extraction and reconciliation work toward dynamic, LLM-powered agentic workflows, and build the evals that prove they're working.
- Work across the backend, databases, search indices, GraphQL APIs, to bring data to life in the product, and build new features or surfaces when the data calls for them.
- Partner with GTM, Product, Design, and other teams as we ship new data products for customers.
Listed by Harmonic for a position based in the United States. Employers on this board attest they are hiring domestically.
Staff Software Engineer - Search
Harmonic · New York City, New York, United States
Pay
$210k–280k
Setting
Hybrid
ABOUT US
Harmonic is the startup discovery engine.
It pains us to see great startup opportunities consistently go unfunded not because of lack of talent, but lack of signal.
We're fixing that by mapping the entire startup landscape and building the tools that put the right companies in front of the right people at the right time. Investors, corporate development, and GTM teams use us to find breakout companies before they're obvious and turn that discovery into action. Whether that's a check, an acquisition, partnership or won business.
We’re growing revenue at a rate of 100%+ annually, backed by $30M from Craft, Floodgate, and Sozo Ventures. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matters most flourish. If that resonates, let's talk.
ABOUT THE TEAM
The Discovery team sits at the core of Harmonic's product and data engine. We make it possible to search, research, analyze, compare, and evaluate across the entire universe of startups (we track tens of millions of companies, hundreds of millions of operators, and tens of thousands of investors along with their deal activity, and counting). We source and ingest data from first-, second-, and third-party sources, including hundreds of fragmented and unstructured sources, and turn them into structured insights and searchable indices. Recently, we built the industry leading agentic layer for startup search and research http://blog.langchain.com/customers-harmonic/, unlocking new paradigms for VCs to make sense of this vast amount of data on startups and automate critical tasks in their sourcing and diligence workflows.
We're in the middle of a massive platform shift where AI and LLMs are transforming what "software" is. Agentic product and user experience patterns will be spelled out in playbooks before long, and we're building those playbooks, not waiting for them. This includes conversational interfaces, deep research, dynamic agentic frameworks purpose built for venture, and AI-first product workflows. We're looking for people who want to help redefine software and push on this frontier with deep curiosity, an insatiable growth mindset, and high agency.
To learn more about the team:
- Explore Working with Sang https://www.notion.so/Working-with-Sang-60672c4041a04021b8539f8e1d4d43ef?pvs=21
- Check out your Scout-focused teammates Austin https://www.linkedin.com/in/austinberke/, Yesh https://www.linkedin.com/in/yesh-c/, and Kelvin https://www.linkedin.com/in/knguyen1794/
- Explore the Team Page https://www.harmonic.ai/team. We're a mix of ex-founders and seasoned engineers from top engineering institutions like Google, LinkedIn, Microsoft, and Meta.
WHO YOU ARE
- You have 7-8+ years of experience building distributed systems or large-scale backend architecture.
- You've designed and scaled search, recommendation, or ranking systems that balance precision, recall, and performance.
- You've led or heavily contributed to ML or LLM integrations in production.
- You have a track record of technical leadership: mentoring others, introducing frameworks, and influencing technical direction.
- You have strong experience with data-intensive systems, asynchronous processing, or event-driven architectures.
WHAT YOU'LL DO
- Architect the core intelligence behind Scout.
- Own the end-to-end architecture of our sourcing engine, from data ingestion to ranking, personalization, and model orchestration.
- Define scalable frameworks for retrieval, reranking, and LLM-driven evaluation to ensure we deliver highly personalized, high-quality results.
- Create architectural patterns that integrate Scout seamlessly with our existing products to power repeatable sourcing workflows.
- Lead agentic experimentation and evaluation.
- Drive technical discovery for emerging technologies, including memory systems, schema, prompt libraries, embedding models, and agentic frameworks.
- Improve and extend our evaluation pipelines to test new models and determine lift in specific parts of our product.
- Build systems that allow fast iteration without compromising quality or reliability. Our priorities are reliability, performance, cost, and then developer productivity.
- Shape AI-native product experiences.
- Partner with Product and Design to define patterns that make LLM-powered sourcing intuitive and fast.
- Translate ambiguous product goals into scalable technical designs that unblock new workflows for our users.
- Establish best practices for building AI-first UX patterns, including agentic flows, async interactions, and structured outputs.
- Provide architectural leadership across engineering.
- Mentor and guide engineers on the team, raising the bar for system design, documentation, and technical decision making.
- Drive clarity in cross-team architecture with Flow, Data, and Infra, ensuring Sourcing evolves as a cohesive, maintainable system.
- Set long-term technical direction for how we build AI-powered sourcing systems.
OUR STACK
[https://app.ashbyhq.com/api/images/user-content/0d1b7df1-d821-4e5a-a8f1-a32049bcf54e/097d4330-7aa2-4cc9-afe9-1f1043e32ed5/cWOMCzl.png]
THE PROCESS
Here’s our interview process:
1. Recruiter Screening: 20 mins
2. Technical Screening (Debugging): 45 mins
3. Technical Screening (System Design): 45 mins
4. Jam Session: 2 hours
5. Behavioral interviews with our Head of Engineering and CEO: 30 mins each
6. References
Listed by Harmonic for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Software Engineer - Full Stack
Harmonic · New York City, New York, United States
Pay
$180k–220k
Setting
Hybrid
ABOUT US
Harmonic is the startup discovery engine.
It pains us to see great startup opportunities consistently go unfunded not because of lack of talent, but lack of signal.
We're fixing that by mapping the entire startup landscape and building the tools that put the right companies in front of the right people at the right time. Investors, corporate development, and GTM teams use us to find breakout companies before they're obvious and turn that discovery into action. Whether that's a check, an acquisition, partnership or won business.
We’re growing revenue at a rate of 100%+ annually, backed by $30M from Craft, Floodgate, and Sozo Ventures. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matters most flourish. If that resonates, let's talk.
We are looking for full-stack engineers to join one of our three teams:
- Discovery. We build the intelligence layer behind Harmonic, transforming hundreds of fragmented, unstructured sources, from APIs and raw HTML to legal filings, into structured knowledge about startups, investors, and people. On top of that foundation, we're building an agentic research system that lets VCs explore the startup ecosystem through natural language and structured queries, surfacing breakout companies before anyone else.
- Flow. Flow is Harmonic's deal management system, built natively on top of our knowledge graph. Instead of forcing investors to sync data between a CRM and external sourcing tools, Flow makes Harmonic a first-class system of record. VCs can manage deals, track companies, and collaborate directly within the platform, the most intuitive and performant way to source, research, and triage opportunities in one place.
- Ecosystem. Ecosystem is focused on making Harmonic first-class wherever investors already work, and on bringing the data from those surfaces back into the product as core context for Scout.
WHO YOU ARE
- You have 5-8 years of experience building full-stack products at scale. This role leans roughly 70/30 back-end.
- You've ideally been a founding engineer, or joined a product early and helped scale it.
- You have a record of shipping high-quality product. We want to hear about the major releases you've driven over the past several years.
- You build with core CS principles and have a strong understanding of how to build highly performant products.
- You have experience building and scaling data pipelines for products that rely on large datasets.
- You're skilled at turning ambiguity into clarity: building scalable, performant, and observable systems from first principles while balancing technical, product, and organizational tradeoffs.
- You're customer obsessed. You love building products for customers and are always looking to improve their experience.
- You're methodical in how you build. You believe in being measured, in experimenting, and in learning quickly. We ship fast, learn, and iterate, but always in a methodical way.
- You have an interest in venture capital and the startup ecosystem.
WHAT YOU'LL DO
- Own customer-facing features and experiences end to end, from the customer's perspective, so that what you ship works exceptionally well.
- Build scalable, performant, and observable systems from first principles, from the data and pipelines underneath a feature to the full-stack product experience on top of it.
- Ship fast, measure what happens, and iterate, treating every release as a chance to learn something real about the product and the customer.
- Work cross-functionally with Design, Product, and GTM to build with a customer-first mentality.
- Constantly question and explore how we can improve our product experience.
OUR STACK
[https://app.ashbyhq.com/api/images/user-content/0d1b7df1-d821-4e5a-a8f1-a32049bcf54e/b5fda8ef-bcf7-4cad-955f-f8ed7dcdb16a/cWOMCzl.png]
OUR PROCESS
1. Recruiter Screening: 30 mins
2. Technical Screening (Debugging): 45 mins
3. Technical Screening (System Design): 45 mins
4. Technical Screening (Coding): 2 hrs
5. Behavioral intesrview with Head of Eng: 30 min
6. Chat with our CEO: 30 min
7. References
Listed by Harmonic for a position based in the United States. Employers on this board attest they are hiring domestically.
Senior Software Engineer - iOS
Harmonic · New York City, New York, United States
Pay
$180k–220k
Setting
Hybrid
ABOUT US
Harmonic is the startup discovery engine.
It pains us to see great startup opportunities consistently go unfunded not because of lack of talent, but lack of signal.
We're fixing that by mapping the entire startup landscape and building the tools that put the right companies in front of the right people at the right time. Investors, corporate development, and GTM teams use us to find breakout companies before they're obvious and turn that discovery into action. Whether that's a check, an acquisition, partnership or won business.
We’re growing revenue at a rate of 100%+ annually, backed by $30M from Craft, Floodgate, and Sozo Ventures. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matters most flourish. If that resonates, let's talk.
ABOUT THE TEAM
This role works directly with our Scout and Discovery teams, bringing our agentic search experience directly to the masses. You'll think about how to create world-class mobile experiences that let our end users unlock insights from our data moat in an entirely new way.
This is a founding iOS engineering role, which means you'll drive a lot of the strategy yourself, working closely with Design and Product to think about how we create cohesion between our web and mobile experiences, while still celebrating what mobile can uniquely bring to our customers.
Here's a preview of the app:
[https://app.ashbyhq.com/api/images/user-content/0d1b7df1-d821-4e5a-a8f1-a32049bcf54e/613f9a58-525e-46c3-9008-e28fe36bee92/Screenshot%202026-07-24%20at%201.20.10%E2%80%AFPM.png]
WHO YOU ARE
- You have 5+ years building and maintaining user-facing iOS applications with real production usage.
- You have clear product and design intuition, demonstrated by a history of creating user-focused iOS experiences with high craft and polish.
- You can take ambiguous problems and build real solutions for them, without needing the path laid out for you.
- You're customer obsessed. You love building products for customers and are always looking to improve their experience.
- You have strong but flexible opinions on what great iOS engineering looks like: opinionated and experienced in modern mobile architecture, patterns, and best practices, but open to having your mind changed.
- You're NYC-based and open to being in office 3 days a week.
WHAT YOU'LL DO
- Build and ship the iOS app from scratch. Own the end-to-end development of Harmonic's first iOS app, from project setup and architecture to shipping the initial product experience. Turn ideas into polished, production-ready features quickly.
- Create exceptional product experiences. Partner directly with Product and Design leads to craft world-class interactive experiences, leaning into AI-native chat UX and setting the quality standard for Harmonic's mobile interactions. Your work will define what "great" feels like in a native iOS app.
- Drive technical decisions and mentor future hires. As the founding iOS engineer, set the bar and help shape how mobile operates at Harmonic long-term.
- Create scalable abstractions and foundations. Set up testing strategies, CI/CD pipelines, modular architecture, and reusable components and patterns that let a future mobile team move fast without breaking things.
OUR PROCESS
1. Recruiter Screening: 20 mins
2. Technical Screening (Debugging): 45 mins
3. Technical Screening (System Design): 45 mins
4. Jam Session: 2 hours
5. Behavioral interviews with our Head of Engineering and CEO: 30 mins each
6. References
Listed by Harmonic for a position based in the United States. Employers on this board attest they are hiring domestically.
Staff Software Engineer - Frontend Platform
Harmonic · New York City, New York, United States
Pay
$210k–280k
Setting
Hybrid
ABOUT US
Harmonic is the startup discovery engine.
It pains us to see great startup opportunities consistently go unfunded not because of lack of talent, but lack of signal.
We're fixing that by mapping the entire startup landscape and building the tools that put the right companies in front of the right people at the right time. Investors, corporate development, and GTM teams use us to find breakout companies before they're obvious and turn that discovery into action. Whether that's a check, an acquisition, partnership or won business.
We’re growing revenue at a rate of 100%+ annually, backed by $30M from Craft, Floodgate, and Sozo Ventures. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matters most flourish. If that resonates, let's talk.
ABOUT THE TEAM
Our Infrastructure team powers Harmonic's ability to process millions of startup signals in real-time. While Flow builds workflows and Discovery surfaces insights, Infrastructure makes it all fast, reliable, and scalable.
We're at an inflection point. Our frontend serves hundreds of users who run complex queries across millions of companies, build sophisticated searches, and collaborate on deal flow. As we scale, we need to transform our frontend from "it works" to "it works flawlessly."
Our infrastructure priorities:
- Reliability. Our users depend on us for critical investment decisions. When they're analyzing deals or presenting to partners, nothing can break. We need robust error handling, graceful degradation, and resilient core flows.
- Performance. Large datasets currently strain our frontend. Views with thousands of rows need to render smoothly. Complex filters need to respond quickly. Data visualizations need to load without blocking the UI.
- Enabling developers. Once we've nailed reliability and performance, the right infra multiplies our team's impact. Better abstractions and clearer patterns let engineers ship with confidence.
WHO YOU ARE
- You have 7+ years building frontend applications at scale.
- You have deep expertise in React, TypeScript, and modern build tooling.
- You have a track record of fixing production performance issues at scale.
- You have strong opinions on frontend architecture, backed by real experience shipping.
- Bonus: you've worked on discovery systems, search, or recommendation systems (CRM, ATS, or similar), or anything that helps index, structure, and surface data for use.
- Bonus: you have exposure to venture capital, private markets, or company intelligence data.
WHAT YOU'LL DO
- Fix core reliability issues: error boundaries, state management, data consistency.
- Optimize performance: virtualization for large datasets, bundle optimization, render performance.
- Build monitoring and observability to catch issues before users do.
- Establish testing strategies that prevent regressions.
- Create abstractions and patterns that help engineers ship faster without breaking things.
- Drive technical decisions and mentor the team through complex migrations.
OUR STACK
[https://app.ashbyhq.com/api/images/user-content/0d1b7df1-d821-4e5a-a8f1-a32049bcf54e/b4a90e7b-7afe-4625-bd7b-606bebe6d06a/cWOMCzl.png]
Interview Process
1. Recruiter Screening: 30 mins
2. Technical Screening (Debugging): 45 mins
3. Technical Screening (System Design): 45 mins
4. Jam Session: 2 hours
5. Behavioral interviews with our Head of Engineering and CEO: 30 mins each
6. References
Listed by Harmonic for a position based in the United States. Employers on this board attest they are hiring domestically.
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