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Legion Health (YC S21) is building the AI-native operations layer for mental health care. We run our own psychiatric practice and are rebuilding what happens outside the visit—scheduling, intake, documentation, billing, risk detection, and coordination. Not “doctor-in-a-box,” but the operational backend that mental health actually runs on. Our agent infrastructure already supports 2,000+ patients with one human support lead. The systems you build will land in real clinical workflows immediately.
Job Responsibility:
Own our event-driven backend
Build real LLM agents as coworkers
Shape human + AI ops UX
Define world-state & simulation
Own data, safety & compliance
Drive architecture & strategy
Requirements:
Owned real systems 0→1 or 1→N, not just tickets
Think in events, state, and invariants, not just CRUD endpoints
Either already LLM-fluent or a strong systems/backend engineer who can get dangerous fast
Care about velocity and correctness
Like small, high-candor teams and direct feedback
Want to see your work go live in production weekly
Nice to have:
Experience with Node.js / TypeScript, Postgres, or Supabase
Experience with LLMs, agents, tool-calling, or RAG
Experience in healthcare, fintech, or other regulated / high-stakes domains
Experience in early-stage startups or founding teams