I’m building an e-commerce website and need an experienced web developer to handle the payment gateway integration. The product catalog and shopping cart are already in place; what’s missing is the secure, seamless checkout that lets customers pay without friction. Your task is to connect the store to a reliable gateway (Stripe, PayPal, or a comparable provider—I'm open to your recommendation) and ensure that: • all card and wallet transactions are processed securely and comply with PCI-DSS • order confirmations, payment status updates, and error handling work flawlessly • the integration plays nicely with my existing front-end and back-end stack, keeping page speed intact Once complete, I’ll test the flow end-to-end. If everything runs smoothly—no failed callbacks, no double charges, and clear logs—the job is done. Please share a brief outline of how you’d approach the integration and any similar e-commerce work you’ve shipped recently.