{"id":3360795,"url":"https://alion.io/job/marvin-senior-software-engineer","title":"Senior Software Engineer","company":{"id":679698,"name":"Marvin","domain":"meetmarvin.com","url":"https://alion.io/company/meetmarvin","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Los Angeles, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":160000,"max":190000,"currency":"USD","period":"year","gross":null,"usd_annual":190000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Braintrust","optional":false},{"name":"Claude Code","optional":false},{"name":"Cursor","optional":false},{"name":"Cypress","optional":false},{"name":"Docker","optional":false},{"name":"Function Calling","optional":false},{"name":"Hallucination","optional":false},{"name":"Langfuse","optional":false},{"name":"LangSmith","optional":false},{"name":"LLM","optional":false},{"name":"Machine Learning","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Next.js","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Playwright","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prisma","optional":false},{"name":"RAG","optional":false},{"name":"React.js","optional":false},{"name":"Storybook","optional":false},{"name":"Structured Outputs","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"Vitest","optional":false},{"name":"HIPAA","optional":true},{"name":"JavaScript","optional":true},{"name":"Node JS","optional":true},{"name":"Sentry","optional":true},{"name":"SOC 2","optional":true}],"status":"live","first_seen_at":"2026-10-27T20:40:01Z","employer_posted_date":"2026-10-27","last_verified_at":"2026-10-30T01:54:06Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Senior Software Engineer (Full-Stack, AI-Native)\nMarvin · Denver/Los Angeles - Hybrid 2-day in office · Full-time · $160k-190k\nAbout Marvin\nMarvin 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.\nThe role\nWe'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.\nTwo things distinguish this role from a standard senior web position:\nYou 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.\n\nYou 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.\n\nWhat you'll do\nOwn features end to end across our Next.js/React/TypeScript app, Prisma/Postgres backend, and AWS infrastructure.\n\nExtend 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.\n\nDesign evaluation and observability for AI features so we know when they get worse, not just when they crash.\n\nPush our AI-assisted development practice forward: agent instructions, reusable skills, hooks, MCP integrations, and review practices that keep quality high as velocity climbs.\n\nHandle sensitive health data responsibly. PHI boundaries, redaction, audit trails, and vendor data agreements are part of the design, not an afterthought.\n\nReview code, whether written by a human or an agent, with a critical eye. Mentor teammates and raise the bar on testing and reliability.\n\nWhat we're looking for\nCore engineering\n5+ years building production web applications, with deep TypeScript, React, and Node experience. Next.js is a strong plus.\n\nComfort across the stack: relational data modeling (we use Prisma and Postgres), auth flows, caching, background jobs, and cloud deployment (AWS, Docker, Terraform or similar).\n\nA real testing habit at every layer: unit, component, and end-to-end. We use Vitest, Storybook, Cypress, and Playwright.\n\nStrong product judgment and the ability to work directly with design, clinical, and partner-facing teammates.\n\nAI fluency (the part that sets you apart)\nDaily, expert use of agentic coding tools such as Claude Code, Cursor, or Codex. You write project instructions and reusable skills for your agents, hand them multi-step tasks, and review the output like a senior reviewer, not a rubber stamp.\n\nHands-on experience shipping LLM features: prompt design and versioning, structured outputs, tool/function calling, streaming UIs, retrieval-augmented generation, and multi-turn conversation state.\n\nYou've run evals and traced production LLM traffic (LangSmith, Braintrust, Langfuse, or homegrown), and you can explain what changed the last time a model version bumped underneath you.\n\nYou understand the cost, latency, and quality triangle and have made real trade-offs: model selection, caching, prompt compression, and fallback strategies.\n\nClear-eyed about limits. You know when an LLM is the wrong tool, how to constrain one when it's the right tool, and how to keep a hallucination from ever reaching a member.\n\nNice to have\nHealthcare, benefits, or other regulated-data experience (HIPAA, SOC 2).\n\nBuilding MCP servers or internal agent tooling for a team.\n\nExperience with Clerk, Stripe, or Sentry.\n\nContributions to AI developer tooling, open source or internal.\n\nHow we work\nAI is part of our engineering culture, not a side experiment. Our repository ships with agent configuration, we maintain shared skills for code review and security checks, and we expect engineers to spend more of their time on judgment and less on typing. We also expect the opposite discipline: no unreviewed AI-generated code lands, and \"the agent wrote it\" is never an explanation for a bug.\nCompensation and benefits\n160-190k base salary · Equity · Health, dental, and vision · [401(k)] · Unlimited PTO · Hybrid 2 days/wk in office (LA or Denver)\nMarvin is an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.","description_format":"text","description_chars":4809,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Unlimited PTO"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Telemedicine & Virtual Care","Digital Mental Health"],"lifecycle":[{"event":"open","at":"2026-10-27T21:20:24Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":36,"reasons":["conf:1","win:early"],"computed_at":"2026-10-29T05:49:05Z"},"pay":{"stated_usd_annual":190000,"is_top_pay":true},"html_url":"https://alion.io/job/marvin-senior-software-engineer","json_url":"https://alion.io/job/marvin-senior-software-engineer.json","meta":{"generated_at":"2026-10-30T03:21:52Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":4443,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-31T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":679698},"rest":"https://alion.io/mcp/rest/get_company?id=679698"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmarvin-senior-software-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmarvin-senior-software-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmarvin-senior-software-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/marvin-senior-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmarvin-senior-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3360795}},{"tool":"search_jobs","arguments":{"company":"meetmarvin.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3360795},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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