Product Engineers at *Y Combinator
Core
Build the future of YC and software for startups, including AI systems, founder tools, and investor software without dedicated PMs.
Role type
Product Engineer (AI-native software builder)
Builds
AI-powered products (GStack, GBrain, Paxel), scalable startup tools (Work at a Startup, Demo Day, investor marketplace), and data-driven systems.
Domain
Startup ecosystem, AI/LLM infrastructure, developer tools
Deliverable
production ML models | product features
Required skills
coding agents, MCP, LLMs, context engineering, evals, developer tooling, Rails, React, Postgres, Python, TypeScript, LLM APIs
Responsibilities
Talk to users, decide what to build, ship quickly, work closely with founders, experiment with new AI technologies.
Seniority
Mid-level to Senior, high-autonomy IC
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