I am a professional Magento Junior Developer at a very prestigious Magento shop. I do have experience integrating payment gateways. Unfortunately, I am in a bit of a money crunch and need to pick up a couple extra projects to make ends meet. However, what this means for you, is you get a highly experienced, knowledgeable, and professional Magento developer for almost nothing. Most of these bids I see on here are not worth a real Magento developers time. Asking for way too much work for way too little money. So I am assuming most of these 'freelancers' really don't know Magento or that Magento is a beast that eats up developers and spits them out charred. There is the Magento way of doing things, the right way, which is not modifying any core code at all, using Magento standard practices, Integrating a Magento payment gateway, especially one with all the documentation should be very easy for me. I have written many a module for Magento and have even written a custom payment gateway. This is the first bid I have ever made on this site. So there you have it. I don't know it all, I am still a Junior Magento Developer, however I am studying to be a Magento Certified Developer and intend to have my Certification from Magento in 6 months. I do specialize in Magento, and I do guarantee my work. This would take one full weekend. I can only work this project on Saturday and Sunday. Please call me at 817-420-4877 after 6pm so we can discuss the full scope over the phone.