Change Payment system from Paypal Adaptive to MassPayment

Our page is based on a customized Fiverr Platform Pro script by Agriya ([login to view URL]). Every offer costs the same amount. The payment process can be described as followed: - User 1 buys an offer and pays via Paypal a fixed amount ($100) - The amount is transfered to our Paypal account - After the seller fulfills the order and receives a review, the amount minus $5 is forwarded automativally to the sellers account The payment process on the platform at the moment is based on Paypal's Adaptive Payment which causes some disadvantages for the users. Therefore we want to change the payment system to Paypal's MassPayment. The payment process of course should stay the same. There is also a gift card system implemented which should work with the MassPayment (it is very simple: the user can buy gift card and gets a code by mail. This code is always worth $100 and can be used to buy any offer on the page). We are looking for a programmer who has experience with MassPayment implementation and cakePHP since the script is based on that framework. Having experience with Agriya products would be an advantage. If you have any questions, please feel free to ask anything. We'd be glad to answer.