Bug fixes and performance improvements to web and mobile app

I am looking for a freelancer/development house to help with bug fixes and performance improvements for our web and mobile app. The app is built on Flutter for mobile, React for web, and has a Node and Mongo backend.

Specific Requirements:
- Fix bugs and issues as provided in a list provided by me
- Conduct comprehensive testing to ensure performance improvements

Ideal Skills and Experience:
- Proficiency in Flutter, React, Node, and Mongo
- Experience with bug fixing and performance improvements
- Strong attention to detail and ability to identify and fix issues

Please note that the developer will be responsible for testing their work to ensure it is 100% end to end. We will handle User Acceptance Testing (UAT) ourselves.

60 cross platform bugs and performance issues to be fixed on both mobile and web apps for the application 'beemz'.

A fairly large application with a number of chat, location and social features.

Must have the relevant skills and experience necessary to be able to complete in a month across tech stack - Flutter mobile with MERN web and backend.

check out 'beemz' on the App and Play stores and beemxyz.com for web.

$500 fixed budget