SHOPIFY backend & SHIP STATON to link to manufacturer front end

We are a new company and just started using Shopify. Our manufacturer has a front end system that we need to link our SHOPIFY orders & SHIP STATION to. We need the API built for the back end to integrate to their front end so they can automatically get the orders as they come in. We also need our API to create the shipping labels in Ship station for the manufacturer to be able to print labels for shipping.