E-marketplace

Ladies and Gentlemen, we need a specialist who could consult us on integration of a payment system into our electronic marketplace (this includes: selection of payment system provider and help with integration) This is a very important point - we are developing a marketplace and not a normal webshop. So if you think you can help us - please contact me to discuss the details. We would prefer a fixed price contract. We're not sure about the adequate price, so you can also tell us your idea. Thank you in advance!