Cross-Platform Delivery Service App Development

I'm seeking an experienced mobile app developer to create a delivery service app for both iOS and Android platforms. The app will cater to small businesses, providing shopping and e-commerce services.

Core Functionalities:
- Real-time tracking
- In-app payments
- Push notifications

E-commerce Services:
- Product catalog
- Order management

Ideal Skills and Experience:
- Proficiency in mobile app development for both iOS and Android
- Experience with real-time tracking and in-app payment integration
- Strong UI/UX design skills
- Background in developing e-commerce platforms is a plus
- Ability to implement push notifications effectively

Please include examples of relevant past work in your bids.