App Bug Fixing and Deployment

I'm looking for an experienced developer to help finalize and fix performance bugs in my app, which was originally built on Rork. The app is designed for both iOS and Android platforms.

Key requirements include:
- Fixing performance issues, specifically app launch problems
- Ensuring overall app quality and stability
- Hosting the app on my own web server
- Publishing the app on the App Store

Ideal skills and experience:
- Proficiency in Rork and cross-platform app development
- Strong debugging and performance optimization skills
- Experience with app deployment and hosting
- Familiarity with App Store submission processes

Please ensure everything is perfect before launch.