{"id":3905525,"url":"https://alion.io/job/ellipsis-health-senior-full-stack-engineer","title":"Senior Full Stack Engineer","company":{"id":173507,"name":"Ellipsis Health","domain":"ellipsishealth.com","url":"https://alion.io/company/ellipsis-health","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":95,"open_postings":12,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":140,"computed_at":"2026-11-08T05:47:12Z"}},"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":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":160000,"max":210000,"currency":"USD","period":"year","gross":null,"usd_annual":210000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"FHIR","optional":false},{"name":"GCP","optional":false},{"name":"Google Cloud Run","optional":false},{"name":"HIPAA","optional":false},{"name":"HL7","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"Voice Agents","optional":false},{"name":"JavaScript","optional":true},{"name":"Model Context Protocol","optional":true},{"name":"SOC 2","optional":true},{"name":"Twilio","optional":true}],"status":"live","first_seen_at":"2026-11-06T22:25:35Z","employer_posted_date":"2026-11-06","last_verified_at":"2026-11-08T23:45:06Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Ellipsis Health builds AI products that take on healthcare's staffing shortages and administrative burden, pairing conversational AI with our patented voice biomarker technology to help deliver better healthcare for everyone. Our voice agents talk with patients every day: booking and rescheduling appointments, answering billing questions, handling medication refills, and checking in after a hospital visit.\nThis role sits on our provider engineering team, building the platform that connects our agents to the EHRs, scheduling systems, and phone systems inside health systems, provider groups, and FQHCs. You'll work across the provider teams within Ellipsis, partnering with AI engineering, product, deployment, and customer teams to make every new health system go-live faster and more reliable than the last.\nWe're seeking a Senior Full Stack Engineer to build the backbone our AI agents rely on. An agent is only as good as the systems it can act on, and in this role you'll design the APIs, integrations, data model, and durable workflows that connect our agents to EHRs, scheduling systems, and phone systems inside some of the largest health systems in the country. The role leans backend and API, but it's full stack and AI is part of the job: you'll design the tools LLM agents call, ship UI when a feature needs it, and work side by side with our AI engineers. In your first three months, you'll ship at least one major EHR or health system integration from spec to go-live, own a core platform service in production, and build reusable integration tooling that makes each new go-live faster than the last.\nYou'll work directly with our SVP of Engineering and engineering leads on a small team where your decisions shape the platform for years. The ideal candidate is a hands-on builder who takes ownership in ambiguous situations, holds a high bar for reliability and observability, and is motivated by making healthcare work better for patients.\nResponsibilities\nDesign, build, and operate backend services and APIs (TypeScript/Node.js and Python) that power our AI agents and the applications around them.\n\nBuild integrations with EHR and health system platforms using FHIR, HL7, and vendor APIs, so messy systems look simple to the rest of the platform.\n\nBuild the agent tools: the APIs and functions LLM agents call to look up patients, book appointments, and process refills, with the reliability, idempotency, and observability that requires.\n\nBuild and scale durable workflows and job pipelines (e.g., Temporal, queues) for outbound campaigns, scheduling, and reconciliation.\n\nEvolve and scale our application architecture, data model, and persistence layer as we onboard more health systems.\n\nShip complete features across the stack, including React/TypeScript UI when needed.\n\nOwn production, including CI/CD, monitoring, alerting, incident response, runbooks, and HIPAA-grade security and audit logging.\n\nQualifications\n5+ years of experience building production backend systems in TypeScript/Node.js and/or Python.\n\nStrong API design skills (REST, webhooks, async processing), along with relational databases (PostgreSQL) and distributed systems fundamentals.\n\nExperience integrating third-party systems and handling rate limits, retries, and partial failures gracefully.\n\nExperience with cloud and containers (GCP preferred; Docker; Cloud Run or Kubernetes).\n\nComfort shipping frontend work when a feature calls for it.\n\nCuriosity about LLMs and agents. Experience building with them is a plus, and you'll get plenty of it here.\n\nPreferred\nHealthcare interoperability experience, including FHIR, HL7v2, and EHR vendor APIs.\n\nExperience with Temporal or similar workflow orchestration.\n\nTelephony or CPaaS experience (Twilio, SIP).\n\nExperience building tools or MCP servers for LLM agents.\n\nSecurity and compliance experience (HIPAA, SOC 2).\n\nSalary and Benefits\nWe offer a competitive salary and meaningful equity, along with comprehensive health, dental, and vision insurance, a 401(k) plan, and [learning budget / conferences / additional benefits].\nThe typical salary range for this role is $160,000 to $210,000 USD, depending on skills, qualifications, and relevant experience.\nBackground Checks\nAs a healthcare technology company, Ellipsis Health may conduct background checks on candidates who receive an offer, in accordance with applicable law. We evaluate every candidate holistically and comply with all applicable \"ban the box\" regulations.\nAssistance\nIf you have a disability or need an accommodation during the application or recruitment process, please contact .","description_format":"text","description_chars":4628,"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","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Medical AI","Digital Mental Health","Care Coordination & Population Health"],"lifecycle":[{"event":"open","at":"2026-11-07T02:54:39Z"}],"visa":[{"country":"US","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"H-1B filings in 12 months: 16","filings_12m":16,"filings_prev_12m":2,"green_card_filings_12m":0,"median_offered_wage_usd":162500,"route":null,"cap_exempt":false,"checked_at":"2026-11-08T10:45:15+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":11}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":140,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-11-08T05:47:12Z"},"pay":{"stated_usd_annual":210000,"is_top_pay":true},"html_url":"https://alion.io/job/ellipsis-health-senior-full-stack-engineer","json_url":"https://alion.io/job/ellipsis-health-senior-full-stack-engineer.json","meta":{"generated_at":"2026-11-09T02:00:30Z","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":4253,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":173507},"rest":"https://alion.io/mcp/rest/get_company?id=173507"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fellipsis-health-senior-full-stack-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fellipsis-health-senior-full-stack-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fellipsis-health-senior-full-stack-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/ellipsis-health-senior-full-stack-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fellipsis-health-senior-full-stack-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3905525}},{"tool":"search_jobs","arguments":{"company":"ellipsishealth.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3905525},"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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