Integrate PAYFAST payment module with SocialEngine platform website

Hi, I am running a website on the SocialEngine platform (from [login to view URL]). Currently, the socialengine website only has a PAYPAL and 2Checkout payment gateways integrated. I need to have a competent developer to integrate the PAYFAST payment system/gateway into the website's payment system. Payfast is a South African payment gateway and they have documentation available on their website that can assist with the integration. please visit their site and review the available documentation. Only persons familiar with the socialengine platform should apply. Important note: The socialengine platform software is frequently updated therefore, the end result of the new payment gateway integration must include clear documentation on how to re-install the custom gateway modification(which will be necessary if I upgrade the socialengine software). I.e I must be able to re-install the custom gateway (payfast) with the instructions / files which you provide on my own whenever / if necessary.