Here is a clear, detailed, and professional exact project description you can post directly on Freelancer: Project Title International Payment Gateway Integration – Stripe, PayPal, Wise & Payoneer (Fixed Price) Project Description We are looking for an experienced payment integration developer to integrate multiple international payment gateways into our company system. The goal of this project is to enable secure international payments with multi-currency support and reliable transaction processing. Payment Gateways to Integrate: Stripe PayPal Wise Payoneer Scope of Work: Full API integration of all four payment gateways Secure checkout implementation Multi-currency support Webhook configuration for payment status updates Proper error handling and logging Sandbox and live environment testing Payment success, failure, and refund handling Basic fraud prevention setup (where applicable) Clean and well-documented code Deployment support Technical Requirements: Strong experience with REST APIs Prior experience integrating Stripe, PayPal, Wise, and Payoneer Knowledge of payment security standards and PCI compliance Experience with international transactions Ability to handle both one-time payments (and subscriptions if supported) Deliverables: Fully functional and tested payment system Successful live transaction testing Complete documentation Source code with comments Post-integration support for bug fixes (short period) Budget: This is a Fixed Price Project. Please submit your fixed quote along with your estimated completion time. When Applying, Include: Your experience with similar integrations Examples of previous work Your fixed price Estimated timeline Your technical approach We are looking for a professional and reliable developer. Successful completion may lead to long-term collaboration.