Android POS App Development

I need an experienced Android developer to build a Point of Sale (POS) application. The app should primarily focus on generating reports, particularly sales reports and customer insights reports.

Key functionalities include:
- Support for credit/debit card and cash payments
- Comprehensive reporting capabilities (sales and customer insights)

Ideal skills and experience:
- Proficiency in Android app development
- Experience with payment integration
- Strong background in building reporting features

Please provide examples of similar work done.