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The Senior Full Stack Engineer Performs software engineering activities in all layers of the stack, from setting up the database to programming in the back-end and the appearance at the front-end. The Senior Full Stack Engineer work assignments involve moderately complex to complex issues where the analysis of situations or data requires an in-depth evaluation of variable factors.

As Centerwell builds its AI engineering function from the ground up, we need a platform foundation strong enough to support everything that comes next. As Lead Full-Stack Engineer focused on platform and API engineering, you will design and build the service layer that connects AI capabilities, data systems, and product frontends—setting the standards for how services are built, secured, and operated across the team.

You will work with meaningful architectural scope, making decisions that span API design, security patterns, and deployment practices. The platform you build will serve care teams and patients across hundreds of Centerwell clinics. If you want to build platforms that others build on—and do it in service of better primary care—this is the role for you.

Key Responsibilities

Platform and API Architecture:** Design and lead development of core backend services, REST and GraphQL APIs, and service-to-service integrations that connect all layers of Centerwell's AI product stack.
Security and Compliance by Design:** Establish patterns for authentication, authorization, rate limiting, PHI access control, and audit logging. Ensure HIPAA compliance is embedded in platform design from day one—not bolted on after the fact.
AI and LLM Integration Patterns:** Define and implement reusable patterns for integrating AI capabilities into product APIs, including LLM routing, streaming responses, tool orchestration, and model output handling.
Observability and Reliability:** Build logging, monitoring, and alerting infrastructure so the platform is operable and debuggable at scale.
Full-Stack Feature Delivery:** Contribute to product feature development end-to-end using TypeScript and Next.js, from server-side APIs to rendered UI.
Architecture Reviews and Standards:** Drive architecture reviews and define backend engineering standards that the full engineering team builds on.

Use your skills to make an impact

Required Qualifications

B.S. or M.S. in Computer Science, Engineering, or a related field (or equivalent experience)
5+ years of software engineering experience with deep expertise in backend and platform engineering
Strong proficiency in TypeScript and/or Python for API and service development
Proven track record building scalable, production-grade REST or GraphQL APIs
Solid understanding of authentication (OAuth2, OIDC), API security patterns, and authorization model design
Working knowledge of HIPAA requirements, particularly secure transmission, storage, and access control for PHI
Experience with Next.js and React sufficient for full-stack feature contribution
Demonstrated ownership of complex backend systems end-to-end, from architecture through production operation
Hands-on experience with AI-assisted development tools and LLM coding harnesses (Claude Code, Pi Agent, Cursor, Codex, or similar)

Preferred Qualifications

Experience in healthcare, financial services, or other highly regulated industries
Exposure to event-driven architecture, microservices, or API gateway patterns at scale
Familiarity with AI/LLM integration patterns, including streaming APIs and tool-use orchestration
Experience in a greenfield or team-founding engineering environment

Additional Information

The candidate must live close to one of our designated IT locations: NYC, NY; Louisville, KY; Tampa, FL; Fort Lauderdale, FL; Dallas/Frisco, TX; Boston, MA; Washington, D.C: Atlanta, GA, Nashville, TN, Chicago, IL, or Charlotte, NC.

Work at Home Requirements: To ensure Home or Hybrid Home/Office employees’ ability to work effectively, the self-provided internet service of Home or Hybrid Home/Office employees must meet the following criteria: At minimum, a download speed of 25 Mbps and an upload speed of 10 Mbps is required; wireless, wired cable or DSL connection is suggested. In certain roles, the minimum recommended internet speed required by Humana may not be sufficient for business needs. Humana reserves the right to require associates to upgrade their internet service if necessary. Work from a dedicated space lacking ongoing interruptions to protect member PHI / HIPAA information.Travel: While this

Senior AI Full Stack Engineer- Backend Focus at Humana