Razorpay Payment Gateway Full Integration

I am seeking an experienced developer to fully integrate the Razorpay payment gateway into our project. This involves removing the existing code and setting up a new integration. The integration will cover both frontend and backend development.

Frontend Requirements:
- Use Kotlin (version 1.7.0 or newer) to integrate Razorpay Checkout in our Android app.
- Allow users to make payments seamlessly.
- Send payment details such as payment_id and order_id to the backend.

Backend Requirements:
- Develop APIs using CodeIgniter to handle payment processing, refund processing, subscription handling, and webhook events.
- Ensure full integration with Razorpay's features.

Payment Methods:
- The integration should support all payment methods offered by Razorpay, including Credit/Debit Cards, UPI, and Net Banking.

Ideal Skills and Experience:
- Proficiency in Kotlin for Android development.
- Strong experience with CodeIgniter for backend API development.
- Expertise in integrating payment gateways, specifically Razorpay.
- Familiarity with handling payment processing, refunds, subscriptions, and webhooks.
- Ability to ensure secure and efficient payment transactions.

I am looking forward to working with a skilled professional who can deliver a robust and comprehensive payment solution for our project.