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# Software Engineer - Patient Products (backed by Y Combinator, $5M+ ARR, $23M+ raised)

- **Company:** Legion Health
- **Location:** San Francisco, CA, United States
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, PostgreSQL, Node.Js, TypeScript, Retrieval-Augmented Generation, Large Language Models, State Machines, Backend, AIOps, Crud
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_37c4f60f409602347dc712646e6597db

## About the Role

* 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.

## Description

* Own our event-driven backend - Architect and scale our Node.js / TypeScript / Supabase (Postgres) / AWS stack. Design schemas, invariants, and workflows that encode how psychiatric care actually operates. Turn messy real-world processes into clean state machines and event streams.
 * Build real LLM agents as coworkers - Implement tool use, retries, memory, and safety rails. Design action schemas and evaluation loops so agents can run reliably in production. Work on orchestration, context management, and multi-step workflows.
 * Shape human + AI ops UX - Build internal tools used by both humans and agents. Make it trivial to see "what happened, why, and what should happen next" in any patient journey.
 * Define world-state & simulation - Model the canonical state of a patient's journey across time. Power alerting, routing, and decision-making from that live simulation.
 * Own data, safety & compliance - Engineer HIPAA-compliant pipelines for transcripts, events, and EHR data. Ensure PHI access, agent actions, and human overrides are all auditable.
 * Drive architecture & strategy - Work directly with me to debate tradeoffs, define new primitives, and decide what we build next.

You don't need to be a pure backend engineer-we value great product engineers who can learn fast, make strong simplifying decisions, and grow into owning backend/agent systems.

You Might be a Fit If…

 * You've owned real systems 0*1 or 1*N, not just tickets.
 * You think in events, state, and invariants, not just CRUD endpoints.
 * You're either already LLM-fluent or a strong systems/backend engineer who can get dangerous fast.
 * You care about velocity and correctness-moving quickly while keeping things understandable and robust.
 * You like small, high-candor teams and direct feedback.
 * You want to see your work go live in production weekly, not sit on a roadmap.