React Native Agency for Fitness App

Description: We need an experienced development agency to build a cross-platform fitness tracking app (React Native / Expo) from an already-approved Figma design. This is implementation work — design is done and signed off. The app includes: Standard auth and profile screens Activity tracking with GPS (including background location tracking on iOS and Android) A backend (Supabase or Firebase) with a realtime leaderboard feature that needs to handle a large concurrent-user spike during a live event Submission to both the App Store and Google Play We're looking for an agency that can staff this properly across frontend, native/mobile, and backend in parallel — not a single generalist. Full technical scope, timeline, and milestones will be shared with the agency we move forward with. Timeline: Full-time, ~2 weeks to first working build. This is time-sensitive — please only apply if your team can start within 48 hours. What to include in your proposal: Confirm you're an agency (team size, roles available) Links to 2-3 shipped React Native apps, ideally including at least one with GPS/location tracking Confirm availability to start within 48 hours, full-time Your team's timezone / daily overlap availability We'll share the full spec, Figma file, and detailed requirements with shortlisted agencies under NDA before final selection.