I run a custom-built PHP recharge site and now want to extend it with BBPS capabilities. I already hold the official documentation and live keys, so what I need is clean, production-ready code that plugs straight into my existing framework and lets users complete Bill Payments and Utility Payments from the same dashboard they already use for mobile recharges. Here’s how I picture the job: • Build the server-side integration in PHP (cURL / Guzzle acceptable) following the BBPS REST specs I will supply. • Create the necessary request/response wrappers so I can log every transaction, parse BBPS status codes, and map them to my current order table. • Add front-end calls (Ajax or fetch) that tap into the new endpoints without disturbing current recharge flows. • Handle all checksum, encryption and callback requirements defined in the BBPS docs, then test against the BBPS sandbox until we achieve consistent success codes. Acceptance will be simple: if a customer can select a biller, fetch the due amount, pay, and see the success receipt reflected both on BBPS and in my admin panel, the milestone is met. I can provide immediate access to a staging server, the API keys, and sample biller IDs. Looking forward to working with someone who has already touched BBPS, UPI, Paytm, or similar payment rails and can turn this around quickly and securely.