Custom Shopify App Product Maker

I pay alot for this app on my site at [login to view URL] and they charge me 1.9% commission monthly on each sale.. but its designed for t-shirts and i am using it for jacks. I need this same app only not as complex. I have a developer account that i can test it on. I just need it to be able to 1-add images to the existing images, - 2. combine the images into one image and then generate the product from it fia the api which i can get you keys 3 generated sku based on the product id, and 4) create a title based on the image name and template. 5) Somehow tell it to Customize Now 7) Trash can for delete and duplicate jack icon actions 8)They shouldnt be able to save or rotate the jacks or any of those other features. 9)Make the product invisible after purchase (set it as a draft so it doesnt show up in search) I would prefer C# because i am a developer with that and 2nd PHP. If other languages are used for this I do not prefer it because i hate javascript/node but if that is not possible then i guess i will deal with node. I am running warehouse theme but that can be changed. I am not sure yet if this will be on another site than my own but only Shopify. Right now the limit is 100 variants per product but i would prefer to make each wall plate a separate listing