I need software that will create 3D print files from sketches linked Shopify store

General information for the business: Retail store specialising in cutter cutters and baking accessories Kind of development: New program from scratch Num. of modules: 3 Description of requirements/functionality: An application that works within our Shopify store that allows customers to upload their cookie cutter designs and our software will turn them into 3D printer designs that we print and post to the customers. Loosely based on the functionality that is used on this site: https://www.cookiecutterkdom.com/pages/tracer but with additional features required (3 different types of cutter designs). Full details in the attachment. I am not a software developer so am looking to work with someone who can take my idea and work with me to develop it into user friendly software linked to our Shopify store. I am open to ideas and guidance on the best way to proceed with this project. Extra notes: Developer to provide a software design document (in collaboration with us) to ensure that we both have a clear understanding of what is going to be developed. TImeframe: to be determined once freelancer has been selected. We want the job done properly, not necessarily quickly.