Mobile App Developer for Strava-like iOS & Android app

We are developing a mobile app similar to Strava however the app is for motorcycle riders. The core features will involve a social feed, advanced map interaction (e.g. displaying routes, interactive elements), and tracking rides (speed, where did you travel, etc). The app will need to be available on both iOS and Android, so either Flutter or React Native will need to be used. Initially thinking of a Supabase backend, however open to suggestions. The app is currently in the *design* phase, however we want to move quickly and would like to develop the app and iterate, constantly moving toward the end product. We will develop the app alongside the designs. Figma designs will be provided. The developer will need to create the frontend and backend for the app. The goal is to have an MVP within a month. The developer will need to be able to effectively use AI to develop quickly to achieve this. After MVP stage, we have more features to add if positive feedback is received from users.