Java Application Enhancement with API & Payment Gateways

I'm looking for an experienced Android Java developer with ThinkPHP knowledge who can integrate an agency and coin seller into my existing application via API. The application is developed in Java with a ThinkPHP backend. The scope of the project includes: - API Integration: Connect the agency and coin seller to the application. - Payment Gateway Integration: Implement both Razorpay and PayU into the system. - Payment Functionality: Set up one-time payments through the payment gateways. Ideal candidates should have a strong background in Java and ThinkPHP, with proven experience in API integration and payment gateway implementation. Understanding of the functionalities of both Razorpay and PayU will be a significant advantage. I am looking for someone who can deliver quality work on time.