Founding Engineer | AI-Native Ops Infrastructure; YC S21 ARR Raised

Build AI-native care infrastructure. Ship into real patient care. Operate at speed.

Hey—I’m Daniel, co-founder & CTO of Legion Health (YC S21). We’re building the AI-native operations layer for psychiatric care : scheduling, intake, documentation, billing, risk detection, and coordination. Not “doctor-in-a-box”—the operational backend that mental health actually runs on.

We run our own psychiatric practice. The systems you build ship directly into real clinical workflows. Our agent infrastructure already supports 2,000 patients with one human , and we’re hiring a Founding Engineer to own core backend agent systems end-to-end.

You’ll architect our event-driven backend (Node.js / Type Script / Supabase / AWS), build real LLM agents with tool use memory retries, shape internal operations UX that both humans and agents co-use, and ship product end-to-end. You don’t need to come in as a pure backend engineer—
we’re open to strong product/full-stack engineers who think in systems and are excited to deepen their backend AI infrastructure skills
.

This role is in-person in San Francisco. Roles evolve fast here—including mine. I’m looking for someone who wants to grow into owning major parts of the system
, not someone relying on me staying in a narrow CTO role forever.

🚀 If you’ve built complex systems or shipped product end-to-end with real ownership , think in events/state/flows , and want to deepen your backend AI systems skills
—we should talk.