Flutter Mobile App Developer

Looking for a flutter developer to help build our existing mobile app.
Skills: Flutter, Java, Google, firebase
Environment: IOS, Android
API experience: Google, Twilio, OTP, Stripe, Affirm/Pay later
Apps: Dating, Matching, Social, Events

If you are a flutter developer, please submit your previous apps for review.

We have a couple of items that need to be cleaned up on our mobile app.
1. Onboarding user instance, currently due to multiple teams working on that part, we have data not stored in our firebase database (2 teams created 2 users instances storing and manipulating data between the 2) and it is causing some login and verification issues.

2. Payment with Strip, the code was working but somehow something is not making it work. Again, multiple testers and dev caused bugs that shouldn't be there. need clean up.

3. Matching(dating type of mating), the profile matching is there, but the logic is not written in the manner I specified, needs some fixes (again 2 users instances!).

4. Users features with chat and video chat created by a freelancer team here that didn't work, never fixed, and still have my team working on their buggy work.

There are other features we are looking to expand on. But once these 3 items are fixed, we will move on to cleaning up the rest and relational database data structure addition.

Let me know what experience you have with the firebase database and data structure setup in flutter/firebase, and your experience in data setup, api, authentication, and strip/apple/google pay.