Saleor shows how serious commerce APIs are designed: everything — products, carts, checkout, vouchers, multi-channel pricing — exposed through GraphQL, with Python/Django underneath. Ideal for learners asking “what does production backend architecture look like?”
Why download it: study its order model, promotion engine, and webhook-based extensibility, then mirror the patterns (in simplified form) in your own store or freelance builds.
Get started: Docker-based local setup per the docs; pair it with the demo Next.js storefront to see headless commerce end to end. BSD-3-Clause licensed.