BigCommerce API expert to create an affiliate system

I am looking for a proficient coder that has worked before with the BigCommerce API and that knows or has a good idea on how to create a system that interferes with the BigCommerce e-commerce platform in order to create an affiliate system where the customers that come to that shop can be tracked for life (recurring payments). If you have any idea how to do this, please let me know and we can discuss the budget and time frame needed for this. Please note that this project is to ensure that you are able to do this piece of web software and that you understand what is needed. Another private bid will be posted for the selected coder. I've also attached a small schema that describes what needs to be done.