Need a specialist for integrating a custom wallpaper configurator with Shopify (backend + checkout).
I have almost completed the frontend:
— image upload
— visual configurator (preview)
— size and price calculator
— "Add to cart" button
❗ Currently, the process stops at this stage. It is necessary to implement the backend and connect everything to checkout.
What needs to be done:
— create backend (custom Shopify app)
— receive data (image, sizes, price, crop)
— save image (S3 / Cloudflare R2)
— perform server-side validation and price recalculation (mandatory)
— create Draft Order through Shopify API
— pass all parameters (sizes, area, crop, image links)
— return payment link (invoice URL)
— redirect the client directly to checkout
Important:
— DO NOT use regular cart + line item properties
— price must be formed through Draft Order (to avoid errors with fractional values)
— protection against price changes on the frontend
Additionally:
— everything must work correctly with two currencies: RON and MDL
— price must be correctly converted through Shopify Markets
Result:
Fully functional flow:
Upload → Configurator → Backend → Draft Order → Checkout
The frontend is fully ready — only backend integration is needed.
If you have experience with Shopify Admin API / Draft Orders — write to me, we will discuss the details 👍