Android Cab App Development

I'm looking for an experienced developer to create a cab application for Android. The app should include:

- GPS navigation
- Payment integration
- Driver and rider profiles
- User authentication system (email/password)

Ideal skills and experience:
- Proven Android app development
- Experience with GPS and payment APIs
- Strong background in user authentication systems
- Familiarity with UI/UX design for mobile apps

Please provide relevant work samples and estimated timelines.