via Jazzhr
$120K - 200K a year
Design, develop, and ship fullstack TypeScript features for web and mobile apps in a HIPAA-compliant health tech startup.
4+ years of hands-on software engineering with advanced TypeScript and React Native experience, backend design with SQL/Postgres, and testing frameworks.
We are searching for a Senior Fullstack Engineer to join a fast-growing Series A health technology startup focused on at-home monthly blood testing and health insights. They have raised a total of over $24 million across three funding rounds, with its latest round in November 2025 raising $19 million. Their main product is an easy, painless at-home kit for collecting your own blood sample. Your results appear in a private, HIPAA-compliant dashboard where you can track your biomarker changes over time and understand their implications for your health. The Tech Stack: TypeScript end-to-end Express + React Router 7 (web) tRPC React Native (mobile) React Query Postgres + Redis What You’ll Do: Own features end-to-end — from design discussion to production rollout and monitoring. Ship TypeScript on the web app, Node/Express backend, and/or mobile app. Contribute to (or learn) React Native. Design and build fault-tolerant, HIPAA-compliant services with a strong focus on privacy, security, and stability. Document your work so others can move fast. Be a great generalist across our stack OR an expert in a few areas. Use the latest AI tools and SDKs to build AI-enriched features. You’re a great fit if you… Bring 4+ years of hands-on software experience, with advanced TypeScript skills. Are comfortable working in a fast-paced startup where procedures aren't clearly defined. Have built some great things you can show us and describe in detail. Manage your own time, break down ambiguous problems, and deliver. Use AI tools as an accelerator—never as the decision-maker. Have experience with React Router, Next.js, or similar frameworks. Understand backend design and data modeling in SQL/Postgres. Are not submitting an AI resume. (If you are human, please say so in your application) Have written reliable tests with Vitest, Cypress, Jest, etc. You’re an excellent fit if you… Have used AI SDKs (AI SDK, OpenAI, Anthropic, etc.) with production software. You have built or maintained HIPAA-compliant or other regulated healthcare software. Are comfortable with internal tooling (e.g., Retool) and thorough documentation habits. Bring deeper expertise in React Native or sophisticated systems architecture. Are comfortable with monorepos. What They Offer Salary: $120k – $200k Equity: 0.05 % – 0.25 % Benefits: Health, Dental, Vision Time Off: Flexible PTO Work Setup: Fully remote
This job posting was last updated on 12/5/2025