{"id":3356565,"url":"https://alion.io/job/3y-health-founding-engineer","title":"Founding Engineer","company":{"id":668753,"name":"3Y Health","domain":"3yhealth.com","url":"https://alion.io/company/3yhealth","size_band":"1-10","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":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Buenos Aires, Argentina"],"countries":["AR"],"hiring_countries":["AR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Claude","optional":false},{"name":"Claude Code","optional":false},{"name":"Cursor","optional":false},{"name":"Function Calling","optional":false},{"name":"LangGraph","optional":false},{"name":"Least Privilege","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI","optional":false},{"name":"OpenAI Agents SDK","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Python","optional":false},{"name":"React Native","optional":false},{"name":"Structured Outputs","optional":false},{"name":"TypeScript","optional":false},{"name":"Amazon ECS","optional":true},{"name":"AWS","optional":true},{"name":"AWS Fargate","optional":true},{"name":"Datadog","optional":true},{"name":"FHIR","optional":true},{"name":"GitHub Actions","optional":true},{"name":"Go","optional":true},{"name":"GraphQL","optional":true},{"name":"gRPC","optional":true},{"name":"HIPAA","optional":true},{"name":"HL7","optional":true},{"name":"JavaScript","optional":true},{"name":"Kotlin","optional":true},{"name":"LangChain","optional":true},{"name":"LLM","optional":true},{"name":"Nest.JS","optional":true},{"name":"Next.js","optional":true},{"name":"Node JS","optional":true},{"name":"pgvector","optional":true},{"name":"PostgreSQL","optional":true},{"name":"React.js","optional":true},{"name":"Snowflake","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-10-27T19:47:58Z","employer_posted_date":"2026-10-27","last_verified_at":"2026-10-31T14:22:59Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"About 3Y Health\n3Y Health is building the operating system for healthcare practices, an AI-native platform that helps clinicians start, run and grow their practice. We work as a managed services organization (MSO): along with the software, our operations team runs the back office for the clinics we partner with, including billing, insurance and compliance. We currently serve applied behavior analysis (ABA) therapy practices and are expanding into speech, occupational and physical therapy, and psychiatry.\nAbout the role\nMembers of Technical Staff own features end to end. You'll work with the clinicians and operators who use what we build, scope the problem, design and build the solution across the stack, deploy it and follow how it performs in production. Our engineering team is flat, with no sub-teams, so you'll work across the whole platform. We build with AI coding agents every day and expect you to do the same.\nWhat you'll do\nDesign and build AI agents and automated workflows for clinic operations, such as insurance benefits verification, prior authorizations, patient intake, claims and clinical documentation\n\nBuild features for clinicians, patients and families, and our internal operations team, on web and mobile\n\nTake ambiguous problems from 0 to 1, working with operators and clinicians to define the problem, write the spec and ship a first version\n\nDesign the services, data models and APIs behind your features and manage the infrastructure as code\n\nOwn your services in production: deployments, monitoring and incident response\n\nWrite evals for model-facing features and track the metrics of the workflows you ship\n\nWork with protected health information (PHI) safely, with least-privilege access, no PHI in logs and auditable changes\n\nBuild and maintain the skills, plugins, MCP integrations and review bots our engineers use with Claude Code and Codex\n\nOur stack\nBackend: Python (our primary language for new services), Kotlin with Hasura (GraphQL) on our established platform, plus TypeScript (NestJS) and some Go\n\nFrontend and mobile: React, Next.js, React Native\n\nData: PostgreSQL (including pgvector), Snowflake\n\nWorkflows and contracts: Temporal, gRPC/Protobuf\n\nInfrastructure: AWS (ECS Fargate, RDS), Terraform, GitHub Actions, Datadog, LaunchDarkly\n\nAI: Claude and OpenAI models, Claude Code and Codex, with our own skills, plugins, MCP integrations and an AI code-review bot\n\nMust-haves\n5+ years of experience building and shipping production software\n\nRecent, hands-on experience using or building AI harnesses: the layer around a model or coding agent (project instructions, tools and MCP servers, skills, hooks, subagents, evals), not only calls to a model API. You can show what you set up or built.\n\nAt least one personal project you built and published on the web, live and usable by anyone, ideally a SaaS with payments working (e.g. Stripe). Share the link when you apply.\n\nWhat we're looking for\nA track record of owning products or features end to end, from an unclear problem to a system people depend on\n\nStrong full-stack skills in Python and TypeScript, with experience across frontend, backend, databases and cloud infrastructure\n\nComfort working in a large, established codebase\n\nHands-on experience building with LLMs, including tool use, agent orchestration, structured outputs, retrieval and evals (LangGraph, an agents SDK or similar)\n\nDaily use of AI coding agents such as Claude Code, Codex or Cursor. You know how to set them up for a codebase (project instructions, skills, MCP servers, hooks, subagents), run several tasks in parallel and review their output carefully. If you haven't heard of Claude Code, this role is likely not a fit.\n\nGood product sense and the ability to make solid UI decisions without a dedicated designer, using our component library\n\nHigh agency: you unblock yourself, look for context and ask questions when you need to\n\nClear written communication. The team is distributed across time zones and most decisions happen in specs, PRs and tickets.\n\nNice to have\nExperience in healthcare or another regulated industry (HIPAA, payer and claims workflows, EHR integrations, HL7/FHIR)\n\nTemporal or another durable workflow engine\n\nReact Native\n\nRunning LLM evaluations or safety checks on model output in production\n\nHaving built your own agent harness, MCP server or plugin for a coding agent\n\nOpen-source work or internal tools that other people use\n\nIf you meet all the must-haves and most of the rest, we'd like to hear from you, even if you don't check every other box.","description_format":"text","description_chars":4559,"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":[],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"country"},{"name":"Buenos Aires","iso":null,"kind":"city"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Machine Learning","Practice Management Software"],"lifecycle":[{"event":"open","at":"2026-10-27T20:07:10Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":3,"expected_fill_days":398,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-31T05:58:55Z"},"pay":null,"html_url":"https://alion.io/job/3y-health-founding-engineer","json_url":"https://alion.io/job/3y-health-founding-engineer.json","meta":{"generated_at":"2026-10-31T15:45:23Z","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":24579,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"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":668753},"rest":"https://alion.io/mcp/rest/get_company?id=668753"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2F3y-health-founding-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%2F3y-health-founding-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%2F3y-health-founding-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/3y-health-founding-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2F3y-health-founding-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3356565}},{"tool":"search_jobs","arguments":{"company":"3yhealth.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3356565},"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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