Flutter App Gamification Enhancement

I'm looking to enhance my existing Flutter app, used by mechanics for registering car problems, into a more interactive community platform.

Key enhancements needed:
- Develop a points-based ranking system.
- Users earn points by:
- Providing help in chat.
- Completing a diagnosis.
- Enable users to finish diagnoses and add basic features to improve fluidity.

Ideal skills and experience:
- Proficiency in Flutter development.
- Experience with gamification integration.
- Strong understanding of community engagement features.

Please share similar work experience in your bids.