Multi-Role Uber-like App Development

I'm seeking an experienced mobile app developer to create a comprehensive, similar-to-Uber app for both iOS and Android platforms.

Key Features:
- User Registration and Profile: The app should allow users to create and manage their profiles.
- Location Tracking and Maps: Incorporate real-time location tracking for both drivers and clients, along with an integrated maps feature.
- Payment Integration: Seamless and secure payment processing is a must.

User Roles:
This app will cater to four distinct user roles:
- Admin: A powerful backend for managing the app's overall functioning and user base.
- Client: The end-users who will request rides or services.
- Driver: Users who will provide the rides or services.
- Businesses: A unique role for corporate entities who may wish to use the app for commercial purposes.

Ideal Skills and Experience:
- Cross-platform mobile app development (iOS and Android).
- Proficiency in integrating location services and maps.
- Experience with secure payment gateways.
- Previous work on multi-role apps will be a significant advantage.
- Strong backend development skills for creating an Admin interface.