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Software Engineer, Core Product
Character.AI · Redwood City, California, United States
Pay
$150k–300k
Setting
Hybrid
Software Engineer, Core Product
Location
Redwood City, CA
Employment Type
Full time
Location Type
Hybrid
Department
Technical Staff - Engineering
Compensation
Estimated Salary $150K – $300K • Offers Equity
🩺 Top-notch health coverage for you & your family, with majority of the premium covered
💰 We invest in your future with a generous 401(K) contribution
🍼 New parents, we've got you covered with incredible paid leave -up to 20 weeks
🌴 4 weeks of PTO to explore, unwind & come back recharged
🍽️ Daily in-office catering plus a monthly Doordash stipend to help keep you fueled no matter where you are
✨ Monthly wellness stipend to support you in your health journey
Overview
Application
About the role and team
We are building the future of open-ended interactions between people and intelligent agents. This requires rethinking design, user interfaces, workflows and interactivity from first principles. We’re looking for a Core Product engineer who is genuinely excited about this future and can make significant contributions to our front-end development efforts. If you are a skilled software engineer with a deep passion for front end development, design, craft, and you thrive in a fast-paced, agile environment, we encourage you to apply for this exciting opportunity.
What you’ll do
Develop highly performant, visually appealing, and user-friendly interfaces that push the boundaries of what's possible.
Enhance and refine our user interface, focusing on engaging our users by fulfilling their needs, desires, and expectations.
Collaborate closely with the design team to translate visionary concepts into tangible user experiences and product interfaces.
Establish, evolve, and maintain design foundations, systems, and patterns for the team, setting the bar for product consistency and quality.
Collaborate with others to define and implement new product features and design patterns
Who you are
Experience as a Front-End or Full-Stack Software Engineer with a strong focus on user experience and design systems
Deep understanding of Typescript, React, React Native, Tailwind, HTML, and modern front-end best practices.
Demonstrated experience with building features and experiences for consumer products
Passionate about the pixels, an exceptional eye for detail, and a focus on craft and polish
Proven ability to work in a fast-paced development environment and deliver timely results.
Excellent communication and collaboration skills across engineering, product, design, and data.
About Character.AI
Character.AI empowers people to connect, learn and tell stories through interactive entertainment. Over 20 million people visit Character.AI every month, using our technology to supercharge their creativity and imagination. Our platform lets users engage with tens of millions of characters, enjoy unlimited conversations, and embark on infinite adventures.
In just two years, we achieved unicorn status and were honored as Google Play's AI App of the Year—a testament to our innovative technology and visionary approach.
Join us and be a part of establishing this new entertainment paradigm while shaping the future of Consumer AI!
At Character, we value diversity and welcome applicants from all backgrounds. As an equal opportunity employer, we firmly uphold a non-discrimination policy based on race, religion, national origin, gender, sexual orientation, age, veteran status, or disability. Your unique perspectives are vital to our success.
Apply for this Job
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Listed by Character.AI for a position based in the United States. Employers on this board attest they are hiring domestically.
Research Engineer, Post-Training (All Industry Levels)
Character.AI · United States
Pay
$225k–400k
Setting
Remote
Research Engineer, Post-Training (All Industry Levels)
Location
Redwood City or New York City
Employment Type
Full time
Location Type
Hybrid
Department
Technical Staff - ML
Compensation
Estimated Base Salary $225K – $400K • Offers Equity
🩺 Top-notch health coverage for you & your family, with majority of the premium covered
💰 We invest in your future with a generous 401(K) contribution
🍼 New parents, we've got you covered with incredible paid leave -up to 20 weeks
🌴 4 weeks of PTO to explore, unwind & come back recharged
🍽️ Daily in-office catering plus a monthly Doordash stipend to help keep you fueled no matter where you are
✨ Monthly wellness stipend to support you in your health journey
Overview
Application
About the role and team
Joining us as a Research Engineer on the Post-Training team, you'll be diving into the exciting world of fine-tuning AI models, optimizing their performance, and ensuring they meet the highest standards of quality and efficiency. Your work will directly contribute to our groundbreaking advancements in AI, helping shape an era where technology is not just a tool, but a companion in our daily lives. At Character.AI, your talent, creativity, and expertise will not just be valued—they will be the catalyst for change in an AI-driven future.
The Post-Training team is responsible for developing our powerful pretrained language models into intelligent, engaging, and aligned products.
As a Post-Training Researcher, you will work across teams and our technical stack to improve our model performance and training methods, including data, compute and algorithms. You will get to shape the conversational experience of millions of users per day.
What you'll do
Develop alignment algorithms and loss functions to improve data sample efficiency.
Write data pipelines to process diverse web data into a format models can ingest.
Identify quality signals to understand our model’s performance in the real world.
Design sampling algorithms to improve serving efficiency of large generative models.
Who you are
"All Industry Levels": have at least PhD (or equivalent)
Write clear and clean production-facing and training code
Experience working with GPUs (training, serving, debugging)
Experience with data pipelines and data infrastructure
Strong understanding of modern machine learning techniques (reinforcement learning, transformers, etc)
Track-record of exceptional research or creative applied ML projects
Nice to Have
Experience with product experimentation and A/B testing
Experience training large models in a distributed setting
Familiarity with ML deployment and orchestration (Kubernetes, Docker, cloud)
Publications in relevant academic journals or conferences in the field of machine learning
About Character.AI
Character.AI empowers people to connect, learn and tell stories through interactive entertainment. Over 20 million people visit Character.AI every month, using our technology to supercharge their creativity and imagination. Our platform lets users engage with tens of millions of characters, enjoy unlimited conversations, and embark on infinite adventures.
In just two years, we achieved unicorn status and were honored as Google Play's AI App of the Year—a testament to our innovative technology and visionary approach.
Join us and be a part of establishing this new entertainment paradigm while shaping the future of Consumer AI!
At Character, we value diversity and welcome applicants from all backgrounds. As an equal opportunity employer, we firmly uphold a non-discrimination policy based on race, religion, national origin, gender, sexual orientation, age, veteran status, or disability. Your unique perspectives are vital to our success.
Apply for this Job
Powered by
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Listed by Character.AI for a position based in the United States. Employers on this board attest they are hiring domestically.
Machine Learning Infrastructure Engineer
Character.AI · Redwood City, California, United States
Pay
$150k–350k
Setting
Hybrid
About the role
We’re looking for seasoned ML Infrastructure engineers with experience designing, building and maintaining training and serving infrastructure for ML research.
Responsibilities:
Provide infrastructure support to our ML research and product
Build tooling to diagnose cluster issues and hardware failures
Monitor deployments, manage experiments, and generally support our research
Maximize GPU allocation and utilization for both serving and training
Requirements:
4+ years of experience supporting the infrastructure within an ML environment
Experience in developing tools used to diagnose ML infrastructure problems and failures
Experience with cloud platforms (e.g., Compute Engine, Kubernetes, Cloud Storage)
Experience working with GPUs
Nice to have
Experience with large GPU clusters and high-performance computing/networking
Experience with supporting large language model training
Experience with ML frameworks like Pytorch/TensorFlow/JAX
Experience with GPU kernel development
About Character.AI
empowers people to connect, learn and tell stories through interactive entertainment. Over 20 million people visit every month, using our technology to supercharge their creativity and imagination. Our platform lets users engage with tens of millions of characters, enjoy unlimited conversations, and embark on infinite adventures.
In just two years, we achieved unicorn status and were honored as Google Play's AI App of the Year—a testament to our innovative technology and visionary approach.
Join us and be a part of establishing this new entertainment paradigm while shaping the future of Consumer AI!
At Character, we value diversity and welcome applicants from all backgrounds. As an equal opportunity employer, we firmly uphold a non-discrimination policy based on race, religion, national origin, gender, sexual orientation, age, veteran status, or disability. Your unique perspectives are vital to our success.
Listed by Character.AI for a position based in the United States. Employers on this board attest they are hiring domestically.
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