Cross-Platform Mobile App Development

I need a skilled developer to create a mobile app for both Android and iOS platforms, preferably using Flutter. The app should feature:

- Robust backend & API integration
- Comprehensive admin dashboard
- Clean, modern UI/UX
- Payment gateway integration (e.g., PayPal, Stripe, Square)
- Push notifications
- Fast and secure app structure

Ideal skills and experience:
- Expertise in Flutter and mobile app development
- Strong background in backend development and API integration
- Experience with UI/UX design for mobile applications
- Familiarity with payment gateway integration
- Knowledge in implementing push notifications and ensuring app security

Please provide examples of previous work and relevant experience.