Marvin Behavioral Health · CO, United States
Skills: React, Next.js, TypeScript, SQL, AWS, Docker, Testing
Senior Software Engineer (Full-Stack, AI-Native) ====================================================
Marvin · Denver/Los Angeles - Hybrid 2-day in office · Full-time · $160k-190k
About Marvin ----------------
Marvin helps people navigate their mental health and wellbeing. We partner with employers and health plans to give their members one place to understand their coverage, find care, and get support, including an AI coach built into the product. We're a small team shipping a production healthcare application, which means every engineer touches things that matter and owns them end to end.
The role ------------
We're hiring a senior full-stack engineer who has made AI a core part of how they build software, not a novelty. This is not a machine learning research role. You won't train models or tune GPUs. You will ship product in a modern TypeScript/Next.js stack, and you'll do it with AI woven into both the product and your own workflow.
Two things distinguish this role from a standard senior web position:
You build with AI. You've moved well past autocomplete. You direct agentic coding tools to do real, multi-step work, you know exactly where they break, and you own every line they produce. You build AI into the product. You've shipped LLM-backed features to real users and lived with them in production: prompts, tool calls, evals, tracing, cost, latency, and failure modes.
What you'll do ------------------
Own features end to end across our Next.js/React/TypeScript app, Prisma/Postgres backend, and AWS infrastructure. Extend our AI coach and build new LLM-powered member experiences: retrieval over benefits data, structured extraction, guided flows, and agentic tool use against our own APIs. Design evaluation and observability for AI features so we know when they get worse, not just when they crash. Push our AI-assisted development practice forward: agent instructions, reusable skills, hooks, MCP integrations, and review practices that keep quality h …truncated… h as Claude…
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