React native bugs fix

I need a react native expert in fixing bugs for my loan app.
It is a loan business, please make sure you are ok with this.
The code is complicated, i need you to optimize and there are some of the performance, crash issues.
There are 2 app (admin and user)
- User app's UI/UX need to be optimized / re-design.
- Chat features not responding in effective way.
- Test whole app (Admin & user) and make sure all features work properly and smoothly
- Admin have different roles & access, please make sure add roles feature is correctly and able to work properly
- Huge data fetching / loading slow or crash issues
- Login feature change from phone number login to email login.

- Add new report feature in admin app based on the transaction

Database & cloud : Firebase firestore
Timeline : 1 weeks (for bug fixes), not including new feature & UI design.
For new feature & UI redesign (2 weeks)