I am currently running a PHP shopping cart called Interspire Shopping Cart ([url removed, login to view]) and require it to be linked to the Setcom payment gateway. ([url removed, login to view])
This requires Back end integration as set out in the server to server API integration guide document on [url removed, login to view] and also attached.
Please only bid if you are 100% confident that you can complete this job. It would be an added bonus if you could show sites that you have completed back end integration for the Setcom gateway.