Cross-Platform Taxi App Development

I'm looking for an experienced mobile app developer to create a comprehensive taxi application for both iOS and Android platforms.

Essential Features:
- Driver and Passenger Login
- Real-time Tracking
- In-app Payments

Advanced Features:
- Ride Scheduling
- Multi-language Support
- In-app Chat

Ideal Skills and Experience:
- Proven experience in developing cross-platform mobile applications
- Strong knowledge of real-time tracking and in-app payment systems
- Experience with multi-language support and in-app chat functionalities
- Familiarity with UI/UX design principles to ensure a user-friendly experience

Please provide examples of previous work and a timeline for completion.