Flutter Kiosk and Kitchen Display monitor App Deployment in androit 4.4.4

I need a Flutter-based kiosk app APK to run on Android 4.4.4. The app should support order processing and include user authentication via username and password.

Requirements:
- Deploy the APK on Android 4.4.4
- Support order processing functionality
- Implement user authentication (username and password)
- Integrate with Firebase for kitchen display monitor

Ideal Skills and Experience:
- Proficiency in Flutter and Firebase
- Experience with Android app deployment
- Knowledge in implementing authentication systems
- Familiarity with order processing systems