I build Shopify API integrations that connect your backend, internal tools, or custom applications to Shopify stores. Whether you need a custom app, webhook handlers, or sync logic for products, orders, and customers, I deliver reliable integrations that scale with your e-commerce operations.
Shopify API Capabilities
Shopify offers REST and GraphQL APIs for products, orders, customers, inventory, and more. Webhooks let you react to events like new orders, product updates, and customer changes. I build integrations that sync data bidirectionally, automate workflows, and extend Shopify's functionality with custom logic. The REST Admin API is straightforward for CRUD operations. The GraphQL Admin API is more efficient for complex queries and bulk operations. Webhooks are essential for real-time updates—I implement handlers that process events reliably. Whether you're building a custom app, connecting to an ERP, or automating fulfillment, Shopify's APIs are flexible enough.
Technical Approach
I use Python (FastAPI or Django) for backend integrations, with Shopify's REST Admin API and GraphQL Admin API. I implement OAuth for app installation, webhook verification, and rate limit handling. For high-volume stores, I use background jobs, queues, and idempotent processing to ensure reliability. Webhook requests are verified with HMAC before processing. I use exponential backoff for retries and store processed webhook IDs to avoid duplicates. Rate limits are respected with token bucket or similar strategies. I log all API calls and errors for debugging and monitoring.
Use Cases
Common projects include: order sync to ERP or CRM, inventory management across channels, custom checkout or post-purchase flows, subscription apps, and reporting dashboards. I've built integrations for B2B pricing, fulfillment automation, and customer data enrichment. E-commerce brands need to sync orders to their warehouse or accounting system—I build that pipeline. Multi-channel sellers need inventory in sync across Shopify, Amazon, and other platforms—I design the sync logic. Subscription apps need to create recurring orders and manage billing—I integrate with Shopify's subscription APIs.
Challenges I Solve
Clients often need: reliable webhook handling (retries, idempotency), handling API rate limits, syncing large catalogs, and maintaining integrations across Shopify API versions. I design for resilience, log errors clearly, and provide monitoring so you know when something breaks. Webhooks can arrive out of order or multiple times—I use idempotency keys to handle that. Large catalogs need batch processing and incremental sync—I build that efficiently. Shopify deprecates API versions regularly—I plan for upgrades and keep integrations current.
Frequently Asked Questions
What's the difference between REST and GraphQL for Shopify?
REST is simpler for basic CRUD. GraphQL lets you request exactly the fields you need in one call, reducing over-fetching. For complex queries or bulk operations, GraphQL is often more efficient. I use both depending on the use case.
How do Shopify webhooks work?
Shopify sends HTTP POST requests to your endpoint when events occur (e.g., order creation). You verify the request with HMAC, process the payload, and return 200 quickly. Heavy processing should be offloaded to a queue. I implement verification, retries, and idempotency.
Can you build a custom Shopify app?
Yes. I can build custom apps that install on Shopify stores, use OAuth for access, and interact with the Admin API. I can also build public apps for the Shopify App Store, though that involves additional review and compliance steps.