Shopify Order & Inventory API Sync

I need a reliable API link that keeps my Shopify order management and inventory tracking systems perfectly in sync. The integration must automatically:

• pull new orders from Shopify, update their statuses back as they progress
• push and refresh real-time stock levels
• keep product information aligned between both platforms

I already have Shopify running; the inventory side is ready to accept API calls. Your job is to build the middleware, configure secure authentication, and set up scheduled or webhook-based triggers so everything flows without manual intervention. Clear, commented code and a concise setup guide are essential so I can maintain it after hand-off.

If you have proven experience with Shopify APIs, inventory synchronization, and robust error handling, let’s get started.