Own end-to-end implementation of product features spanning mobile (React Native / Expo), web (Next.js App Router), and backend services (NestJS / Node.js)
Collaborate closely with product and design to translate complex health concepts into clear, usable experiences
Drive technical decisions that balance speed, quality, and long-term maintainability
Build and maintain shared UI and interaction patterns using Tamagui across mobile and web
Implement mobile experiences using React Native (Expo), expo-router, TanStack Query, and offline/background sync patterns
Build web experiences using Next.js (App Router) and React
Integrate payments using Stripe.js and react-stripe-js
Integrate frontend applications with custom authentication hooks backed by Firebase and backend identity services
Consume and evolve REST APIs
Implement analytics (PostHog), error tracking (Sentry), and accessibility best practices
Write and maintain frontend tests using Jest, Vitest, React Testing Library, Playwright, and Detox as appropriate
Design and implement backend services using NestJS (v11) and TypeScript
Build secure, well-validated REST APIs using zod, class-validator, and OpenAPI
Implement authentication and authorization using Google Identity JWT validation and role-based access control
Model relational data using Prisma and Postgres (Cloud SQL)
Implement async and background workflows using Google Cloud Tasks
Integrate with external services such as OCR, scheduling APIs, and third-party data sources
Ensure observability through structured logging, metrics, and Sentry
Write unit and integration tests using Jest
Act as a senior individual contributor, setting quality bars through code, reviews, and architectural decisions
Partner closely with infrastructure and DevOps engineers to ensure reliable deployments
Identify opportunities to simplify systems and reduce operational overhead
Contribute to evolving engineering standards, patterns, and best practices
Mentor mid-level engineers as the team grows

Requirements

6+ years of professional software engineering experience
Strong experience across frontend and backend development
Production experience with React (web and/or React Native)
Strong experience with Node.js and TypeScript
Experience designing and consuming REST APIs
Solid understanding of relational data modeling and ORMs
Strong grasp of authentication, authorization, and security fundamentals
Comfort working in small teams with high ownership and autonomy
Ability to lead or follow as the moment calls for
Familiarity with design patterns of distributed systems

Benefits

100% employer-paid medical, vision, and dental insurance (multiple plans available).
100% employer-paid life insurance, short-term, and long-term disability insurance.
Employer-sponsored HSA contributions for HDHP medical plans
Additional HSA and FSA spending account plans for employees
401(k) with a 5% company match.
Generous PTO and holiday schedule.
Company-issued technology and work-from-home stipend.
A chance to shape a product, and a company, from the ground up.
The opportunity to work at the forefront of health and longevity science with a team of world-class professionals dedicated to precision, mastery, and excellence.

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

React NativeExpoNext.jsNestJSNode.jsTypeScriptREST APIsPrismaPostgresStripe.js

Soft Skills

collaborationtechnical decision-makingmentorshipleadershipautonomyproblem-solvingcommunicationquality assuranceteamworkadaptability