Full Stack Engineer

ABOUT THE ROLE Join a small AI product team building tools that help teams improve the reliability of AI agents in production. You will work across backend systems and polished product experiences, owning problems from customer discovery through launch and iteration. WHAT YOU'LL DO - Build product experiences for agent investigations, evaluation workflows, debugging, verification, and replay. - Talk with customers about agent failures, identify needs, and turn them into shipped product improvements. - Develop APIs, data models, internal systems, and user-facing features across the full stack, with a backend emphasis. - Build systems that support large-scale investigations across production traces. - Design platform capabilities such as workspaces, permissions, billing, usage tracking, SDKs, and terminal-first developer workflows. - Work directly with teams building production AI agents and use their feedback to guide product decisions. WHAT WE'RE LOOKING FOR - Five to eight years of experience in full-stack product engineering, ideally with a backend focus. - Experience shipping user-facing products end-to-end, including React or Next.js interfaces and backend services. - Strong skills in TypeScript and React, plus Python or Node.js; familiarity with PostgreSQL is relevant. - Ability to design clean APIs and effective data models, and debug production issues across the stack. - Experience working directly with customers and translating their needs into product improvements. - AI agent, LLM product, evaluation, observability, developer tooling, SDK, or CLI experience is a plus. COMPENSATION & BENEFITS Base salary: $230,000 to $300,000 annually. Visa sponsorship is available. LOCATION On-site in San Francisco, California, United States.