App Reskin and Feature Addition

I'm looking for an experienced app developer to reskin an existing radio app and add some new features. We have the source code ready.

Requirements:
- Reskin the app with new UI, icons, and graphics
- Add user login/logout functionality
- Integrate push notifications
- Implement in-app purchases

Ideal Skills:
- Proficient in mobile app development
- Experience with UI/UX design
- Knowledge of integrating authentication and push notification services
- Familiarity with in-app purchase implementation