Mobile App Enhancement Post Launch

I am looking for a skilled Mobile App Developer/ website developer to take over from my current team. the stackup is php laravel ,javascript , and for the mobile app its flutter . the platform is called www.bzmarr.com also it has user app for andriod and ios , it has seller app also for android and ios and delivery man app The app is already launched, but it requires improvements to enhance performance and user experience. The app caters to both iOS and Android platforms.

Ideal Skills:
- Proficient in cross-platform mobile app development/ web app development
- Experience with post-launch app improvements
- Familiarity with both iOS and Android development guidelines

Key Responsibilities:
- Evaluating current flatforms performance
- Implementing necessary improvements
- Ensuring app maintains high quality on both platforms