Multi-Platform Delivery App Development

I'm looking for an experienced mobile app developer to create a delivery app for both iOS and Android. The app should have the following features:

- User registration and login: This feature should ensure a smooth onboarding process for new users and secure access for returning users.
- Order tracking: I need the app to provide real-time updates on the status and location of users' orders. This will help enhance the user experience and trust in the service.
- Payment integration: The app should allow for seamless, secure, and reliable payment transactions. It should support multiple payment methods and ensure a user-friendly checkout process.

While I have some ideas for the design and theme of the app, I'm also open to your suggestions. A clean, intuitive and visually appealing design is crucial for the app's success.

Ideal skills and experience for this project include:
- Proficiency in both iOS and Android app development
- Experience in creating user-friendly registration and login systems
- Prior work on order tracking features and integrating payment gateways
- UI/UX design expertise, especially in creating visually appealing and intuitive designs
- Strong communication skills to incorporate my ideas while suggesting improvements