Flutter App Bug Fixing

I'm looking for a core Flutter developer to resolve some critical issues in my app. The app currently crashes and has performance issues on both iOS and Android platforms.

Key Skills Required:
- Expertise in Flutter and Dart
- Experience with Firebase and Google Maps integration
- Proficiency in state management using GetX
- Problem-solving skills to diagnose and fix crashes and performance bottlenecks

Please provide examples of similar work done and your approach to tackling these issues.