Senior Full-Stack Software Engineer
US-only / No contractors / No recruiters
This is a senior position; we are not currently offering junior roles.
About Rythm Health
Rythm Health delivers a painless, at-home self-collection kit right to your door, plus a secure, HIPAA-compliant dashboard that turns monthly blood tests into actionable insights. Rythm makes it easy to track—and continuously optimize—your biomarkers from the comfort of your home.
Our 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…
Live and work in the U.S. and communicate clearly in English.
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 We Offer
Salary: $120k – $180k
Equity: 0.05 % – 0.25 %
Benefits: Health, Dental, Vision
Time Off: Flexible PTO
Work Setup: Fully remote
Hiring Process If you have a better way to showcase your abilities and what you've built, let us know.
20-minute intro call with Dac (Co-Founder & CTO) — chat about Rythm, the role, and your goals.
60-minute systems-design exercise — no leet code tricks; just high-level design and SQL pseudocode.
Choose one:
45-minute live React exercise to replicate a small UI, or
2-hour take-home project — build a simple React/React Native feature (cap of 2 hours)
References & final chats — meet another team member, ask any last questions, and wrap up logistics.
Average salary estimate
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