Flutter Developer for Free Fire App

I'm looking for a skilled Flutter developer to create a Free Fire top-up app with Rocket payment integration in Bangladesh.

Essential requirements:
- Integrate Rocket payment gateway
- Implement user authentication
- Display transaction history
- Set up notifications

Ideal skills and experience:
- Expertise in Flutter development
- Experience with Rocket payment integration
- Familiarity with building secure authentication systems
- Ability to create intuitive transaction history and notifications interfaces

Please provide a portfolio showcasing similar projects. Looking forward to your bids!