Full-time | On-site | San Francisco, CA
Compensation: $135,000–$170,000 + Equity (0.1–0.17%)
About the Role
A fast-growing Series A startup backed by $17.5M in funding is seeking a full-time Software Engineer to join its team in building robust developer tools and scalable data pipelines that directly support coding LLMs used by frontier labs. This is a high-agency role for junior engineers (0–3 years of experience) who thrive in fast-paced environments, want to take ownership over their work, and are passionate about shaping the future of software development through AI.
What You'll Do
Build and maintain high-quality developer tooling, environments, and documentation
Own the full technical lifecycle of data pipelines from spec to deployment
Collaborate with partner labs to define new data formats and QA systems
Leverage AI tools to accelerate productivity and improve developer experience
Contribute to projects with significant autonomy and room for creativity
Qualifications
0–3 years of professional software engineering experience
Track record of ownership on projects from prototype to production
Strong full-stack skills with React and a modern backend language (Python, Go, Node.js)
Familiarity with CI/CD pipelines, AWS, and Docker
Experience working in medium to large codebases or on open-source projects
Excellent written communication skills, including the ability to write for less technical audiences
Highly organized, with the ability to bring structure to ambiguity
Deep curiosity, technical judgment, and a sense of pride in craftsmanship
Bonus Points For
Experience building tools for other developers
Familiarity with LLM output evaluation methods
Notable personal projects, fellowships, or leadership in competitive programs
Additional Details
On-site in San Francisco 5 days/week (no remote)
Visa sponsorship available (though preference may be given to candidates available to start immediately)
Paid trial period is part of the interview process