Cross-Platform User Friendly Mobile Taxi App

I am in need of a skilled mobile app developer who can create a highly functional and user-friendly taxi app for both drivers and passengers. This app should initially be developed for iOS, with Android development to follow.

The core functionalities of the app should include:
- Ride Booking: A seamless interface for passengers to book rides
- Driver Tracking: Real-time tracking of the taxi's location
- Payment Processing: A secure and efficient payment gateway