I would be working on the following features, and some additional features which are mentioned in my proposal based on Community remarks,
1) Add Multiple account login and maintain session of the account.
2) Add Passcode feature to avoid the everytime login.
3) Sync Adapter to sync clients and client data that is assigned to him.
4) Add Kotlin support in app and initially change the retrofit models in kotlin.
5) Add review screen in every new records creation form.
6) Edit Loan application feature if loan is not approved
7) Add new data views in different different pages like customer detail page according to API, same as in loan, deposit account details