I run an NFT-based ecommerce platform that previously used Paytm without a hitch. After adding a few new features, users can no longer initiate payments—the Paytm button simply fails to fire the request. Verification and completion logic remain untouched; the problem sits squarely at the initiation step. I need an experienced developer who has already worked with Paytm’s payment gateway (Checkout JS or server-to-server APIs) to: • audit the current integration and pinpoint why the initiation call isn’t being triggered • revise or refactor the code so Paytm loads, tokenizes, and hands back the transaction request reliably • test against Paytm’s staging and production environments, confirming successful initiation, verification, and completion for multiple order values • document any new endpoints, callbacks, or config changes so future feature updates don’t break the flow again Our stack is a standard web frontend talking to a Node.js/Express backend, with order data stored in MongoDB, but you’ll find most of the Paytm logic in a dedicated service file. I can give you repository access, API keys, and recent error logs immediately. Once payment initiation is stable, I’d appreciate a quick code walkthrough so my in-house team understands the fix. If you see quick wins to improve performance or security in the same file, flag them—we’ll scope a follow-up if needed. Looking to start as soon as you’re available.