Key skills
AndroidFirebaseiOSJestReactReact NativeAnalyticsGitHub ActionsSentryGitHubExpoMobile DevelopmentCI/CD
About this role
Role Overview
- Build and maintain a high-quality React Native (Expo) mobile application for iOS and Android
- Implement complex, stateful user experiences using Tamagui, expo-router, and TanStack Query
- Integrate with REST APIs and custom authentication hooks backed by Firebase and our backend identity layer
- Design and implement offline-first and background sync behaviors for daily health data and scoring
- Integrate mobile-specific services including:
- Push notifications (@react-native-firebase/messaging, Notifee)
- Payments (@stripe/stripe-react-native)
- Analytics (PostHog)
- Error tracking (Sentry)
- Ensure accessibility best practices are followed across mobile surfaces
- Collaborate closely with product, design, and backend engineers to ship iteratively and safely
- Participate in CI/CD workflows using EAS and GitHub Actions
- Implement, maintain, and enhance behavior testing suites to identify and prevent product regression
Requirements
- 4+ years of professional frontend or mobile development experience
- 3+ years of iOS development experience
- 2+ years of hands-on React Native experience
- Strong understanding of React hooks, async data flows, and state management
- Experience integrating REST APIs and handling auth flows securely
- Familiarity with mobile testing strategies (Jest, Detox, or equivalent)
- Strong attention to UX quality, performance, and reliability
- Familiarity with native iOS and Android SDKs
- Experience implementing offline sync or background tasks
Tech Stack
- Android
- Firebase
- iOS
- Jest
- React
- React Native
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.