Shopify powers more than a million online stores around the world.  Many store features you see every day, such as discounts, bundles, and order fulfillment are built using apps. These apps are created by developers to extend Shopify and solve real p...

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Learn to build Shopify apps from scratch using JavaScript and APIs. The guide covers app architecture, OAuth authentication, GraphQL API usage, and development environment setup with Shopify CLI. Three real-world case studies demonstrate bundle/discount apps, order fulfillment integration (Printful), and shipping rate calculation (Shiprocket). Includes code examples for fetching products, handling webhooks, and calculating shipping rates, plus guidance on testing and App Store submission requirements.

How to Build Your First Shopify App: A Beginner’s Guide

Case Study Two: Printful and Order Fulfilment

Case Study Three: Shiprocket and Shipping Rates