Handling Eventual Consistency in Shopify Integrations

If you have built a Shopify integration before, you have hit this wall. Your warehouse system shows 50 units. Shopify shows 45. An order comes in for 10 units. Now you have a problem you did not plan for. This is eventual consistency at work. And it is one of the most common sources of production bugs in Shopify-connected systems. This post walks through why it happens and exactly how to handle it. What Eventual Consistency Actually Means Eventual consistency means all systems will reflect the s