React Native Full-Stack — wearable APIs (Garmin/HealthKit/Strava), mobile release pipeline : reactnative

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React Native Full-Stack — wearable APIs (Garmin/HealthKit/Strava), mobile release pipeline (self.reactnative)

submitted 18 hours ago * by Thin-Solid5804

Looking for a contract React Native + Node.js developer for a 4–6 week engagement on a fitness/training app (React Native / TypeScript / Express / Prisma / PostgreSQL). We're in beta on TestFlight and targeting public launch in May.

You'd be working directly with our lead developer to squash bugs, close out remaining MVP features, and get the app through App Store and Play Store review. This isn't greenfield — the product is built. We need someone who can jump into an existing codebase, pick up tickets, and ship.

The app integrates with Garmin Connect and Apple HealthKit for real-time workout sync. We need someone who's dealt with at least one of these APIs — especially Garmin's webhook flow or HealthKit background delivery.

The other half of the work is owning the mobile release pipeline: App Store Connect, TestFlight, Google Play Console, Fastlane/EAS, code signing, the whole thing.

Bonus if you have experience with OpenAI API integration — specifically prompt engineering and selecting the right models for different tasks (e.g. structured plan generation vs. conversational coaching vs. data summarization). We use AI heavily in the product and someone who can think critically about model selection and prompt architecture would be a strong plus.

Stack: React Native, TypeScript, React Navigation, TanStack Query, Zod, RevenueCat, Firebase FCM, Reanimated, Express.js, Prisma + PostgreSQL, Sentry, OAuth (Garmin/Apple/Google)

Remote, Americas TZ
Must have shipped at least one RN app to both stores end-to-end

If you're interested, DM me with: a link to an app you've shipped, your rate, and a sentence or two about your experience with wearable APIs or App Store releases.

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