Lead Software Engineer

About Onos HealthOnos Health's mission is simple but ambitious: ensure every healthcare dollar goes toward delivering the highest quality care. Today, 30% of total U.S. healthcare spending is wasted due to ineffective care and administrative burden caused by misalignment between providers and payers.Onos is addressing this by building the largest AI-driven healthcare data platform. Our models enable payers to make faster, more accurate decisions across their populations. By guiding members to the right care, Onos is channeling more dollars to high-quality care that drives better outcomes while making healthcare more affordable.Onos is well-funded by some of the best healthcare investors and is working with the nation's largest health plans. Come join a category-defining company and help reimagine healthcare for the better.Why Onos?Meaningful impact: Help fix what is fundamentally broken in healthcareDirect collaboration: Work alongside experienced founders with deep healthcare and data expertiseCulture: Join a high-performing, transparent, and results-oriented teamOwnership: Significant responsibility and autonomy from day oneOpportunity: Play a pivotal role in building a fast-growing, category-defining healthcare AI companyThe RoleWe're seeking an experienced and highly capable engineering leader who is motivated to meaningfully improve the way healthcare is administered in the United States. You'll take ownership of developing a significant part of the Onos platform through hands-on development and technical leadership. As an early team member, you'll work closely with our founding team while helping to build and lead a growing engineering team. This role is a hybrid role based in San Francisco, where you'll be expected to work at our office in person 3 times a week.What You'll Be Doing At OnosArchitect workflows that utilize AI/ML to process claims, medical records and other data types to evaluate the optimal care path for health plan membersLead the integration and rollout of the Onos platform for new enterprise customers to provide actionable insights and recommendations to health plan administratorsOwn end-to-end development of new features and functionality for the Onos platform, including requirements gathering, scoping, architecting, implementation and testing to deliver timely and high quality outcomesEstablish engineering best practices and technical foundations for future team growthShape our technical roadmap, make key architectural decisions, and influence the company's product and technical strategyTechnical Challenges At OnosDevelop an intelligent engine that ingests complex medical standards of care documents and evaluates provider adherence to guidelinesDesign and implement robust and extensible systems to easily support many different kinds of enterprise workflows and integrationsBuild AI/ML pipelines to analyze handwritten clinical notes, accurately extract important medical information, and automate recommendations for clinical reviewersScale our systems to process millions of healthcare records while maintaining strict security and compliance requirementsTech StackAt Onos, we work with a modern tech stack where we continuously evaluate and adopt cutting-edge technologies as we scale.Infrastructure/Systems: AWS (ECS, Bedrock, Glue, etc.), Docker, Github Actions, TerraformLanguages/Frameworks: Backend: Python, Django, Celery / Celery Beat, django-ninja, django-tenantsFrontend: NextJS, Typescript, Tanstack Query, Shadcn UI, Zod, NuqsDatabase/Storage: PostgreSQL (AWS RDS), S3, ClickhouseDevelopment Tools: Github, Jira, Claude Code, CoderabbitAI, TuskWhat We're Looking For5+ years experience building software applicationsPrior experience leading engineering teams as a tech lead or engineering managerStrong product sense and system design skills with a track record of defining clear requirements, test scenarios, and acceptance criteria for complex systemsCustomer obsessed and motivated to make an impact in the healthcare spaceA hands-on technical leader who can architect robust and extensible systems, establish best practices with AI coding tools, and ship high quality production codeBonus Points If You HaveWorked with machine learning and large language models for end-user applicationsHands-on experience navigating healthcare data formats such as EDI X12, HL7, FHIR, and custom payer flat filesBenefits And PerksHybrid arrangement: 3 days/week at San Francisco office (Financial District)Unlimited vacation policyPaid parental leaveMedical, dental, and vision insurancePre-tax commuter benefits401(k)Significant equity as an early employeeDirect mentorship from experienced foundersGround-floor opportunity to help build a team and cultureRegular team events and offsitesCompany-provided equipment and home office setupWe are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.