Cross-Platform Food Delivery App

I'm seeking an experienced developer to create a food delivery app for both iOS and Android platforms.

Key Features:
- Restaurant Listing: Comprehensive directory of restaurants.
- Order Tracking: Real-time tracking of orders.
- Payment Gateway Integration: Secure transactions; user authentication via email/password is also required.

Ideal Skills & Experience:
- Proficiency in mobile app development for both iOS and Android.
- Experience with secure payment gateway integration.
- Strong background in implementing user authentication systems.
- Prior experience in developing food delivery or similar applications is a plus.

Please provide samples of your previous work in your bid.