Keystone builds infrastructure for autonomous coding agents. We give agents sandboxed environments that mirror production, event-based triggers (Sentry, Linear, GitHub), and verification workflows so they can ship code end-to-end— not just write it. We're hiring a founding engineer to work directly with me (solo founder) on core product. Stack is TypeScript, React (Next.js), Python, Postgres, Redis, AWS.

In-person in SoMa. $150K-$350K + 0.5-3% equity. https://www.workatastartup.com/jobs/75962