Android Developer for quickly developing and delivering app to playstore

Looking for a skilled native Android/Java developer. Work involves taking an existing UI, doing minor tweaks and integrating existing APIs.

The tweaks to the UI concern mainly:
- Adding a new feature, "user revoke". This feature involves the ability to revoke a user account.
- possible small fixes

Freelancer should be able to thoroughly test and deliver the project, Make app ready to go live on playstore, Fix any issues in playstore review and ensure support during the go-live phase.

Ideal skills and experience include:

- Strong knowledge and proven experience in Android/Java Development
- Proficiency in UI modification
- Good testing capabilities
- Work with Backend developer to resolve any API issues
- Ensuring a smooth go-live phase

Would like a fixed-bid for this project