Founding Product Engineer United States, San Francisco Jobs (On-site work)

Founding Product Engineer for an early-stage legal tech team in San Francisco. Build AI-powered full-stack software with TypeScript and React, shaping engineering practices. Requires 3-4 years experience and AI/LLM skills. $140k-$180k.

Founding Product Engineer to build an AI-driven B2B pricing platform in San Francisco. Requires 8+ years of backend experience with Python and FastAPI, plus React skills. Base salary $200,000-$250,000.

Join AgentMail as a Founding Product Engineer in San Francisco, building communication infrastructure for AI agents. Own products end-to-end, from frontend to backend, with high autonomy and direct customer contact.

Founding Product Engineer for an early-stage consumer AI company in San Francisco. Own an AI assistant end to end, from agent architecture and evals to full-stack TypeScript/React features. $200k-$300k, on-site.