Amazon Payment Service - Payfort payment with Flutter and .NET

I am looking for a skilled developer who can integrate the Amazon Payment Service (Payfort) payment gateway into empty Flutter app with a .NET backend. This PoC code that will be added to an existing project.

Requirements:
- Payment should be done on flutter app with optimal expected user experience.
- Payments through credit card, apple pay and tabby.
- Apple Pay integration.
- Add comments.
- Provide proof it works on latest Android and iOS.

Skills and Experience:
- Proficiency in Flutter and .NET development.
- Strong understanding of backend development and API integration.
- Amazon Payment Service (Payfort) gateway integration.
- Experience in Apple Pay integration.