Shopify coder who can adapt/supplement shopify values to third party service provider.

Good day, we are looking for a developer who can help us to implement a java script code on one of our sites. Platform: Shopify Here, variables should be filled with data from Shopify and sent to another service provider. Sample code is available. Here is the instructions: We sell products through Shopify: [login to view URL] We would like to work with Sovendus. Here it concerns, after the purchase of an article, on the thank you page different, individual coupon codes for our customer to offer. The vouchers come from the "Sovendus" advertising network. For the integration of this advertising network, different Javascript codes are used. The variables of these codes must be supplemented / adapted by the variables provided by Shopify: [login to view URL] The detailed work instructions are attached in German. For the implementation, we use our Dev-Shop. For this we need your eMail address, in order to be able to create a user account here.