Cross-Platform Food Delivery App Development

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

Core Features:
- User registration and login
- Order tracking
- Payment gateway integration

Design:
- Unique, custom design required

Ideal Skills and Experience:
- Proven experience in developing cross-platform mobile apps
- Expertise in implementing secure payment gateways
- Strong UI/UX design skills for creating unique app interfaces
- Familiarity with order tracking systems

Please provide examples of similar projects completed.