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Product Engineer, New Products

United States, San Francisco Bay Area Employment contract 185000.00 USD / Year · Job Posted June 29, 2026
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Job Description

Y Combinator is building a new generation of products for the AI-native era — and we're hiring product engineers to build them. Some ship in the open to hundreds of thousands of developers (gstack, gbrain — already north of 130,000 GitHub stars between them). Some are proprietary products in their own right (Paxel). All of them start from the same belief: a single builder with the right tooling now ships like a team of twenty, and we intend to build the tools — and the platforms — that prove it. This is a rare seat. You won't be maintaining someone else's roadmap. You'll be taking new products from zero to one, owning them end-to-end, and putting them in front of real users fast.

Job Responsibility

  • Take new products from 0→1 — design, build, and ship full-stack systems and developer tools end-to-end
  • Build AI-native software: agent orchestration, semantic search, embeddings, knowledge graphs, LLM workflows
  • Own developer and user experience completely — 30-second installs, time-to-first-value measured in minutes, interfaces people actually want to use
  • Ship some work in the open and engage a real community
  • ship other work as commercial product. Pick the right call for each
  • Use your own fully AI-enabled dev stack and make pragmatic tradeoffs in a fast-moving environment

Requirements

  • Experience shipping full-stack or systems software end-to-end
  • Strong system design and independent decision-making
  • Strong product sense and comfort designing user experiences
  • Clear communication and the ability to work directly with non-technical stakeholders
  • High judgment and integrity

Nice to have

  • LLMs, prompt engineering, or agent-based systems
  • Open-source maintainership and community engagement
  • TypeScript, Postgres/pgvector, Rails, React (the stack our current products run on)
  • Retrieval, search, or knowledge-graph systems

What we offer

  • Medical, dental, vision
  • 401(k) + 4% match
  • parental leave
  • flexible PTO
  • profit-sharing (comparable to startup equity or VC carry)

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