Fiat Payment Gateway Integration

I’m ready to start taking USD payments and need a developer who can integrate a fiat gateway that cleanly separates incoming funds for transparent accounting. The flow is simple—one-time purchases only—but it must run flawlessly on both my website and companion iOS/Android apps.

You’ll select a reputable gateway, wire it into our existing stack through the provider’s REST/JavaScript SDKs, and make sure card data never touches our servers. Webhooks should post back purchase confirmations and settlement details so we can reconcile each sale automatically.

Deliverables
• Gateway selection rationale and account setup guidance
• Fully implemented checkout on web (React) and mobile (Flutter) with secure tokenisation
• Webhook scripts and database schema for segregated payout tracking
• End-to-end test cases covering success, failure, and edge scenarios
• Deployment walkthrough plus concise technical documentation

If you’ve rolled out PCI-compliant USD gateways before, I’d love to see examples.