Kotlin App UI Overhaul & Integration

I'm looking for a skilled developer to update the UI of my Kotlin Android app and integrate it with Airpay for several features.

The app's current backend is built with PHP Laravel.

Here are the tasks required for this project:

UI Update:
- Change color scheme
- Revamp layout
- Update icons and images
- The freelancer is responsible for creating new designs.

Integration with Airpay for:
- Recharge
- BBPS (BillAvenue)
- Rent payment

Ideal skills and experience:
- Strong proficiency in Kotlin and Android development
- Experience with PHP Laravel
- UI/UX design skills
- Familiarity with payment gateway integrations, especially Airpay