Senior Application Engineer (Full-Stack)
About The Position
Town Square Health is seeking a Senior Application Engineer to join their small team working on SquareOne, their custom care delivery and patient engagement platform. The role involves working directly with the CTO and a small distributed engineering team, alongside an external design and development partner. The company is AI-native, integrating AI into both the product and their development processes. The ideal candidate will be a senior full-stack engineer with strong TypeScript, React, and Node experience, hands-on fluency building with LLM APIs, and an interest in performance-critical Rust services. This role offers the opportunity to build and ship features that directly support clinicians and Care Navigators, work on AI-powered workflows core to the TSH care model, operate with ownership and autonomy, help establish engineering practices, and contribute to a platform that will evolve with the organization's growth.
Requirements
- 5+ years building and shipping production web applications, with strong TypeScript, React, and Node experience
- Experience with, or strong interest in, Rust for backend services
- Hands-on experience building with LLM APIs (prompting, tool use, agentic patterns) and daily fluency with AI development tools
- Comfort with ambiguity and ownership: small team, many responsibilities, fast-moving development
- Strong product judgment: you ask why before building what
- Excellent collaboration and communication abilities
- Mission-driven, collaborative mindset and a passion for improving access to high-quality primary care
Nice To Haves
- Healthcare data experience (FHIR, HL7, claims)
- EHR integration work
- Experience in HIPAA-regulated environments
Responsibilities
- Design, build, and ship full-stack features across SquareOne’s product areas: Patient, Clinical, Analytics, and Internal Tools
- Work directly with clinical and operations leaders to translate care workflows into product
- Build AI-powered workflows on Temporal, including agentic task handling and care coordination automation
- Apply judgment-driven use of AI development tools to move quickly without compromising quality
- Integrate with Athena via its APIs for scheduling, clinical documentation, and operational data
- Contribute to core backend services written in Rust
- Help establish engineering practices, including code review, testing, CI/CD, and observability, that will scale as the team grows
Benefits
- Comprehensive benefits package (medical, dental, vision, 401K)
- Flexible hybrid work model based in Ann Arbor, MI
- Opportunity to build something from the ground up
- Direct impact on how care is delivered to older adults
- High visibility and influence in a growing organization
- Collaborative, mission-driven team
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
