Payment Flow Fix - Laravel+React Developer required (Payment API & Database Status Update Fix)

I have an existing PHP Laravel + React.js web application and need an experienced developer to fix an issue in the payment flow. Required Work - Fix the payment page frontend in React.js - Fix/integrate the payment API with the Laravel backend - Ensure payment success/failure responses are handled correctly - Update the relevant database payment/order status automatically after successful payment - Verify backend API response and frontend payment confirmation - Handle payment failure, cancellation, and pending states properly - Debug the existing Laravel, React, API, and database code - Ensure the complete payment flow works correctly without affecting existing functionality Requirements - Strong experience with Laravel/PHP - Strong experience with React.js - Good knowledge of REST APIs and payment gateway integration - Strong MySQL/database knowledge - Experience debugging existing production applications - Ability to start quickly and complete the task efficiently The application is already developed. I only need the existing payment flow fixed, not a complete application from scratch. Please mention your relevant Laravel/React/payment integration experience when applying.