An Expert with Flutter, Firebase, Dart and Kotlin

I need the help of a developer who has experience with flutter and knows how to integrate goggle assistant to help me develop a simple watch app using dart or Kotlin to work alongside the existing app in fluuter, also you have experience in authentication, biometrics, disabling screenshots urgently, Please i need people who are sincere and serious and ready to start working straight away and time friendly with a fair budget..thanks