Revamp React Native Code & Fix DB Issue

I'm looking for a seasoned React Native developer who can help me refactor my React Native code for better performance. The code is quite dated, and I need it to be updated and optimized as if it was written 5 years ago. Project is using Firebase Database.

Budget is $100

Here are the specific requirements:
- Code refactoring for better performance: The existing code is inefficient, and I need it to run more smoothly and effectively.
- Upgrade dependencies and libraries: The project relies on several outdated libraries and dependencies, which need to be updated to their latest versions. This includes:
- React Native version
- Navigation library
- State management library

In addition to these tasks, I am also experiencing a database issue where data is not syncing properly. This needs to be diagnosed and fixed as well.

Ideal skills and experience for the job:
- Extensive experience with React Native
- Strong understanding of code refactoring techniques
- Proficiency in upgrading software libraries and dependencies
- Experience troubleshooting and fixing database issues
- Ability to optimize code for better performance