Traffic does not break Shopify. Bad architecture does. I have seen stores with solid product-market fit completely fall apart at 5,000 concurrent visitors — not because Shopify failed them, but because nobody thought about what was running underneath the storefront. This post breaks down the 8 architecture patterns that actually matter when you are building for scale. The Core Problem Shopify runs on Google Cloud with Fastly as its CDN. The infrastructure scales. What does not scale automatically is everything layered on top of it: Third-party app scripts that inject JavaScript on every page load Liquid templates with nested loops and synchronous API calls Checkout flows tested once, never under concurrent load Inventory sync apps that race condition under simultaneous cart adds Fix these, and Shopify handles almost anything you throw at it. Pattern 1: Layered Caching Do not rely on Shopify's CDN alone.…