Mobile Product Experience Engineer
Core
Building the mobile product experience for an AI voice coach for strength training, focusing on workout flows, onboarding, and interaction patterns to make the app feel essential for users.
Role type
Senior Mobile Product Experience Engineer (React Native/Expo)
Builds
Mobile app screens, core workout flows, onboarding, and user-facing details for a strength training AI coach.
Domain
Consumer fitness technology / Mobile applications
Deliverable
product features
Required skills
React Native, Expo, TypeScript, React, UI/UX design, Design system creation, Firebase integration, AI-assisted development (Codex)
Preferred skills
Real-time audio/BLE/wearable integration, Native iOS/Android debugging, Subscriptions/Payments/HealthKit, Mobile analytics, Startup experience, Agentic loops/subagents
Responsibilities
Own the mobile experience from start to finish including workout execution and review; Translate product feedback into fast, polished iterations; Collaborate with the founder and backend engineer on system boundaries; Debug and optimize performance under load.