Android App Customization and Ad Integration

I'm looking for an experienced Android developer to customize an existing utility app and integrate AdMob ads.

Requirements:
- Clone existing repo
- Implement custom mustard yellow theme throughout app
- Integrate AdMob SDK to display full-screen interstitial ad after splash screen (app start only)

Ideal skills and experience:
- Android theme customization
- AdMob SDK integration
- Proficiency in Kotlin programming

Deliverables:
- Complete source code
- Working APK
- Brief documentation

Timeline: 1 week

Please include relevant experience with Android theming and ad integration in your proposal.