Flutter Mobile App & CodeIgniter Web App Bug Fixes

I'm looking for an experienced Flutter developer to fix issues in an existing mobile app (Android & iOS) and its connected web application built with CodeIgniter. Tasks: Fix search issues in the Flutter app. Improve app performance and resolve bugs. Fix CSV import in the CodeIgniter web application. Fix category issues and add support for nested categories. Make a few UI changes, including colour updates. Test all fixes before delivery. I also need help generating the Android and iOS release builds and publishing the updated apps to my existing Google Play Console and Apple App Store Connect accounts. Please share your relevant experience, similar projects, your estimated timeline, and your quote. Only apply if you have experience with Flutter, CodeIgniter, and app deployment.