UPI Payment Gateway Integration

I have an immediate requirement for an expert to integrate a UPI payment method into my website, CC AVANUE.

The chosen freelancer should include support for Google Pay, PhonePe, and Paytm. This project should be completed as soon as possible to optimize functionality and convenience for our users.

Candidates should possess the following:
- Proven experience integrating UPI payment methods
- Familiarity with Google Pay, PhonePe, and Paytm
- The ability to complete tasks promptly, reflecting our need for immediate completion
- Excellent troubleshooting skills, as any potential issues with the integration need to be solved efficiently.

Please bid according to these specific requirements. I look forward to working with a skilled and dedicated professional. The opportunity to work on future projects may be available for the candidate who successfully completes this task.


App language. ---- Koltan

Jetpack compose as frontend

There are 3 apis

1 to collect secteat key
Working key
Of payment gateway

2. Need to fill user details

3 need to trigger an api and store data in database

full of function is ready already another Payment gateway is active

I just need from your end what means

*Need to change Payment gateway*

*Need to have only upi intent method*


Need to add an api for app

Playstore APP UPDATE MANDATE AUTO UPDATE API