Paytm and Phone Pay payment gateway integration in Android

I am looking for a freelancer who can integrate the Phone Pay payment gateway into my Android App

Requirements:
- Integration of the Phone Pay and paytm payment gateway
- Ability to accept payments only, no refund processing or subscription management required

Ideal Skills and Experience:
- Experience with integrating payment gateways, specifically Phone Pay, paytm
- Familiarity with e-commerce platforms and their integration capabilities

Please provide examples of previous work and relevant experience when applying for this project.