React Native / Expo Developer for Ride-Hailing App GOKAZ

React Native / Developer Needed to Audit, Complete and Deploy Existing Ride-Hailing App

I am looking for an experienced React Native / Expo developer to audit, improve, complete and deploy an existing mobile application called GOKAZ.
GOKAZ is a ride-hailing / mobility application inspired by apps such as Uber, Grab, Bolt and Getir.
The application is already developed and functional in several areas. I am NOT looking for someone to rebuild the whole application from scratch.
Current stack
React Native
Expo
Firebase Authentication
Firestore
Stripe
GPS / Maps / MAPBOX
iOS + Android
Main mission
The developer will need to:
Audit the existing source code.
Identify bugs, missing features and technical issues.
Improve the current application and UI/UX.
Complete the Rider and Driver workflows.
Verify the Admin functionality.
Secure and optimise Firebase.
Test the complete booking/payment flow.
Prepare the application for production.
Deploy the application on Android and iOS.
Assist with Google Play Store and Apple App Store submission.
Important
I need a developer who has already worked on at least one:
Taxi booking app
Ride-hailing app
Delivery app
Driver/rider app
Uber/Bolt/Grab-style application
Please send:
Examples of similar applications you have developed
Video/demo or App Store / Play Store link if available
Your experience with React Native, Expo and Firebase
Your experience with Maps/GPS/MAPBOX and real-time tracking
Your experience with Stripe
Estimated scope of work
The source code and intellectual property must remain 100% owned by GOKAZ.