Automatically fulfilling orders of my store (shopify to testflight)

Hi, We are looking for someone who can automatically fufill our orders of our ios app we need as soon as an order comes in from our shopify for the customer for the customer to automatically be sent a Hi, We are looking for someone who can automatically fufill our orders of our ios app we need as soon as an order comes in from our shopify for the customer for the customer to automatically be sent an email where they gain acesss to our app via testflight( we use to have a system in place where it would send the user an automat...