Optimize React Native App Performance

I need a seasoned React Native developer to diagnose and fix performance issues in my app. The problems are occurring on both iOS and Android platforms.

Ideal Skills and Experience:
- Extensive experience with React Native
- Proven track record in app performance optimization
- Familiarity with both iOS and Android app development
- Strong problem-solving skills.

Problems
Fix my react native fire base chat app that is like WhatsApp

- fix forget password make it send to email
- fix the chat system to send video and audio and images with no problem and without any lag
- fix the group section to add multiple members when new group created
- create a backend for the app to have better storage and better performance to add more features