Mobile App Developer Needed to Fix Bugs, Responsiveness & Performance Issues

We’re looking for an experienced Mobile App Developer to fix and optimize an existing mobile application. The app was initially built through a vibe-coding approach. Most of the major issues have already been fixed, but a few technical, performance, and UI/UX issues still need to be resolved. The remaining work includes: 1. Fixing existing bugs and unexpected behavior 2. Improving responsiveness across different screen sizes and devices 3. Fixing slow loading, reload, and navigation issues 4. Removing UI clutter and unnecessary elements 5. Cleaning up redundant and unnecessary code 6. Improving overall app performance and stability 7. Identifying and fixing any remaining technical issues 8. Making sure existing features work smoothly without breaking anything 9. Testing the app properly after implementing the fixes This is not a complete app development project. Most of the work has already been completed, and we need someone who can inspect the existing codebase, identify the remaining problems, and implement clean and reliable fixes. You should be comfortable working with an existing mobile app codebase, understanding code created through AI/vibe coding, debugging issues, optimizing performance, and cleaning up unnecessary code. We are looking for someone who can solve the actual problems rather than unnecessarily rebuilding or changing parts of the application that are already working.