Java Android App: UPI Gateway Integration

I'm looking for a skilled Java developer with experience in Android application development and payment gateway integrations to help with my project.

The successful freelancer will integrate UPI gateway, with an emphasis on payment processing and transaction history.

Additional payment methods beyond UPI are not needed for this project.

Key Skills:
- Java
- Android Development
- UPI Gateway Integration
- Payment Processing
- Transaction History Tracking

Experience with UPI gateway service providers is a plus. Please provide examples of previous similar work in your bid.