Affiliate API Integration with BigCommerce Store

I´m an affiliate member of Darwin Affiliates & [login to view URL] and I need the integration of their API with my BigCommerce store. I want to integrate their affiliate-programs into my BigCommerce store as follows: Each time, somebody comes to my site he must get a cookie with the referrer-ID (which comes with the link). When the buyer registers on my site the referrer-ID must be taken out of the cookie and saved in his profile. When a registered User buys something in my shop or registers to a seminar the information about the price and the referrer-ID from his User-Data must be submitted to cj or darwin affiliate with a little program called API. This is easy ... just one command-line with the Information integrated. When a non-registered User buys something the same information must be submitted, but the referrer-ID must come from the cookie. Ah, one last thing. There are two types of commissions (5% and 7%). This Information is saved in the product-data. The type of commission must be passed to the right affiliate network. You will notice from my store ([login to view URL]) that my products have either #UK or #US sign in the description. This simply means that the products will be shipped from a vendor registered with Darwin (UK) or CJ (US) supplier. I am looking for a programmer who has in-depth knowledge of these two affiliate programs and how their API's can be integrated into the BigCommerce platform. All the rest, like the payment, the html for the ref-links, the statistics and so on are set up by CJ or Darwin. I only need the information-flow to Darwin Affiliate and [login to view URL] and the saving of the data of the user. ## Deliverables ) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the buyer’s environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S / UK Copyright law. Buyer will receive exclusive and complete copyrights to all products purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).