Enhance Android applications with further functionalities

We have Android app project for healthcare where we wish to add functionalities, features clear an identified issues

-Platform has 2 applications for 2 different set of users
-Connects the users with each other based on restful APIs
-Supports messaging and calling

Changes to be done on the login process as per the new flow and updated APIs
Data representation and Ui needs to be updated
Changes in APIs to be incorporated
Any app issues identified to be fixed

Development in Kotlin, RoomDb, irrebase, Retrofit, BLE integration
The development needs to be committed to Git periodically