Proliferate (YC S25) is hiring to building open source Codex

Proliferate (YC S25) is hiring early engineers to build an open source operating system for modern engineering. The company operates in person in SoMa, San Francisco, and seeks candidates for high-ownership roles across product, systems, and UX. The stack includes TypeScript, React, Next.js, Python, Postgres, Redis, AWS, and Rust. Compensation includes top-of-market salary, meaningful equity, full benefits, and a health stipend.