Flutter Food Delivery App Upgrade Using Github

I need a Flutter developer to upgrade my food delivery app via GitHub. The project involves adding new features, updating existing code, and enhancing the overall functionality.

Key requirements:
- Add new features like in-app chat, multi-language support, and promo codes
- Update existing code for better performance and security
- Integrate APIs, improve UI components, and possibly revise the database schema

Ideal skills and experience:
- Expertise in Flutter and Dart
- Strong background in mobile app development
- Experience with GitHub for version control
- Familiarity with API integration and database management

Looking for a reliable developer who can deliver high-quality work within the budget.