Full Stack Engineer

Role details

ABOUT THE ROLE Join a team building software infrastructure that helps organizations improve the reliability of AI agents in production. This backend-leaning, full-stack role combines hands-on product engineering with customer insight to shape agent investigation, evaluation, and debugging workflows. WHAT YOU'LL DO - Build product experiences for agent investigation, evaluation workflows, trajectory debugging, verification, and replay. - Work with customers to understand agent failures, define product solutions, and iterate on shipped features. - Develop APIs, data models, internal systems, and user-facing product surfaces across the stack. - Build systems that run large-scale investigations across production traces. - Design platform capabilities such as workspaces, permissions, billing, usage, SDKs, and terminal-first developer tools. - Collaborate with AI teams building production agents and turn their feedback into product decisions. WHAT WE'RE LOOKING FOR - 2 to 5 years of full-stack product engineering experience, with a backend emphasis. - Experience shipping user-facing products end-to-end, including frontend work with React or Next.js and backend development. - Strong skills in TypeScript and React, plus Python or Node.js; familiarity with PostgreSQL is relevant. - Ability to build polished interfaces, design clean APIs, model data, and debug production issues across the stack. - Hands-on experience with AI agents, LLM-powered products, or agentic systems, and interest in evaluation, debugging, or developer tools. - A formal computer science degree or equivalent academic background, with strong software engineering fundamentals. - Experience working directly with customers and influencing product decisions through engineering work. COMPENSATION & BENEFITS Base salary is $150,000 to $275,000 USD annually. Visa sponsorship is available. LOCATION On-site in San Francisco, California, United States.