Cross-Platform Location Sharing App

I need a React Native app to share device location based on a Trip ID. The app should work on both Android and iOS and use a REST API to send location data.

Key Requirements:
- User enters a Trip ID and clicks a button to start location sharing.
- Location is sent to the server every few seconds.
- Must work when:
- App is minimized
- Phone screen is locked
- App is running in the background

Ideal Skills:
- Proficiency in React Native and Expo
- Experience with background tasks and location services
- Knowledge of REST APIs

Please provide examples of similar work done.