Working with Payment Gateways: How to Build Maintainable Systems
If you've ever had to integrate payments into an app, you know it can quickly get tricky. Money is involved, networks drop requests, users retry buttons, and external services send async updates. If you don't structure your logic cleanly from day one, your system can easily become a headache to maintain. In this article, I want to share my understanding of working with payment gateways in the most maintainable way.
