Android App Fix and Integration

I need an experienced Android developer to fix issues on my app and integrate several services. The app is currently facing crash errors, performance issues, and integration problems.

Key Tasks:
- Integrate Google Stable Maps
- Integrate Razorpay API
- Set up Cloud Console
- Connect and manage Firebase Database
- Fix existing crash errors and performance issues
- Otp validation
- call routing and call masking

Ideal Skills and Experience:
- Proven experience with Android app development
- Strong expertise in Firebase and database management
- Familiarity with Google Maps integration and Razorpay API
- Experience with Cloud Console
- Strong problem-solving skills and attention to detail

Please provide examples of similar work done.