Payment Gateway Integration for Scheduling App

I'm looking for a skilled freelancer to integrate a reliable payment gateway into my professional scheduling app. The payment gateway should be fully functional in India and capable of handling both one-time and recurring payments.

Key Requirements:
- Choose and implement a suitable payment gateway (any working in India)
- Support for both one-time and recurring payments
- Implement Two-Factor Authentication for secure transactions

Ideal Skills:
- Proven experience with payment gateway integration
- Familiarity with Indian payment systems
- Strong understanding of app security measures