Payment service provider integrations freelancer / recurring missions

Dear Freelancers, We are looking for a freelancer to integrate multiple payment service providers (RECURRING MISSIONS for our clients, we are looking for a LONG TERM relationship with a payment integration guru). We have around 3 integrations per month. You MUST have a lot of experience in this field, APIs from payment providers do not have any secret for you (paypal, adyen, hipay, worldpay, skrill, paysafecard, sagepay, safecharge, gate2shop, webmoney, [login to view URL], etc etc.) Please send us references for payment integrations (We do not want to see that you developped a website from scratch, we want payment integrations) Experience with web design and payment page design is a big plus. Budget: depending on the PSP to be integrated. The payment solutions will be integrated on our client' websites. Do not contact us if: - you are not located in EUROPE (PLEASE READ THIS) for timezone issues - you integrated a PSP one day in your life - you do not have any experience with payment APIs - you do not have any reference