I need a coder for my website

I have an a product and basically I want to track who buys it in a social network. How it works is when someone gets the product in the mail they are going to be encourages to go online and purchase it as a gift for their friends. When they do this they pay the bundle price for 3 of these products to which they are going to tell me who they are and where to ship them to. The goal is that when that set of people gets the product they are encouraged to do the same thing and go online and purchase for 3 of their friends. I want to track this as the goal is to show how fast things spread. I want the users to be able to see the networks of people they have affected. I would realistically like to implement this into a shopify store. I have not made the store yet so If i have to use a different platform to do so I would be okay with that.