FoundingEngineer

ABOUT THE ROLE A YC-backed enterprise AI SaaS startup is looking for a Founding Engineer to join their small, high-output team in San Francisco. The company is building an agentic operating system for the enterprise, with thousands of agents already deployed at scale-up startups and enterprise companies. They have strong product-market fit and are growing revenue rapidly month-over-month. This is a founding-level role with CTO-level expectations. You'll take vague problems, scope them, build them end-to-end, and ship things that create real value — with no hand-holding and no waiting for specs. You need to be a full-stack engineer, an AI engineer, and a product engineer rolled into one. Former founders are especially encouraged to apply. WHAT YOU'LL DO - Own large parts of the product end-to-end — from user insight all the way to production - Build and continuously improve agentic systems: accuracy, reliability, and capability - Work at the frontier of AI engineering — context engineering, tool use, agent architectures - Talk to users, understand their pain points, and scope features that genuinely solve problems - Ship full-stack when needed (Go backend, Vite + React + TypeScript frontend) - Champion AI-first development practices — coding agents, automation, and self-scaling workflows - Review code quickly while maintaining high standards across the codebase WHAT WE'RE LOOKING FOR Must-haves (dealbreakers): - Proven production experience building backend services in Go (Golang) - Authorized to work in the United States without visa sponsorship Required skills: - Experience building frontend applications with React and TypeScript - Hands-on experience with CI/CD pipelines, automated testing, deployment workflows, and production monitoring/observability - Experience building and consuming REST and/or gRPC APIs in microservices architectures - 0–3 years of professional software engineering experience (full-stack or equivalent) Strong pluses: - Prior startup experienc