Required Native,Phone,Xamarin,Android,iOS freelancer for Xamarin and Firebase developer job

I need a developer who can do the following tasks within Xamarin. Forms, Firebase Auth, and Firebase Realtime Databases.

The login, registration, forgot password, and profile pages have already been created. I need someone to do the following tasks.

1. On the registration page include a username option that is required to signup. (currently only email and password).

2. On the profile page display the username based on the logged-in username.

3. Keep user logged in until user logs out. (should remain logged in even after the app has been quit).

Skills & Expertise Required

Native Phone Xamarin Android iOS