Cross-Platform Bike Taxi App Development

I'm looking for an experienced app developer to create a bike taxi application for both iOS and Android platforms. The app should include:

- Real-time GPS tracking
- In-app payment system
- Ride history feature
- Administrative control over all operations

Ideal Skills and Experience:
- Proven experience in developing cross-platform apps
- Strong background in integrating GPS and payment systems
- Familiarity with backend development for administrative functionalities
- UI/UX design skills for a user-friendly interface

Please provide samples of previous work and estimated timelines.