Custom Shopify App Development
Service description
I build custom Shopify apps that push your store past the limits of any theme. When merchandising rules, fulfilment logic or a supplier integration cannot be solved by tweaking Liquid, I design and ship a real application: an embedded admin app that lives inside your Shopify dashboard, a private or custom app scoped to a single store, or a public app packaged for the App Store with recurring billing built in. Everything is written against the current Admin and Storefront GraphQL APIs, follows the App Bridge and Polaris conventions Shopify expects, and passes the review checklist before it reaches your account.
My work covers the parts that make an app dependable rather than a demo. I wire up webhooks for orders, products, carts and app uninstalls with verified HMAC signatures and idempotent handlers, so nothing is processed twice when Shopify retries. I add checkout UI extensions and Functions for custom discounts, delivery options and validation, connect your ERP, CRM, warehouse or payment provider through clean API layers, and handle OAuth, session tokens, rate limits and pagination the way a production integration should. Where you sell your app to other merchants, I implement the Billing API with trials, usage charges and upgrade flows.
You get readable code, a staging build to test on, deployment notes and a short handover call so your team can run it. I can start from your written spec or help shape one, take over a stalled app, or prepare an existing build for App Store submission. Tell me the workflow your store is missing and I will tell you honestly whether it belongs in an app, a Function or a lighter script.
— Embedded admin apps with App Bridge and Polaris
— Private and custom single-store apps
— Webhooks, checkout extensions and Shopify Functions
— ERP, CRM and payment API integrations
— App Store submission with Billing API
My work covers the parts that make an app dependable rather than a demo. I wire up webhooks for orders, products, carts and app uninstalls with verified HMAC signatures and idempotent handlers, so nothing is processed twice when Shopify retries. I add checkout UI extensions and Functions for custom discounts, delivery options and validation, connect your ERP, CRM, warehouse or payment provider through clean API layers, and handle OAuth, session tokens, rate limits and pagination the way a production integration should. Where you sell your app to other merchants, I implement the Billing API with trials, usage charges and upgrade flows.
You get readable code, a staging build to test on, deployment notes and a short handover call so your team can run it. I can start from your written spec or help shape one, take over a stalled app, or prepare an existing build for App Store submission. Tell me the workflow your store is missing and I will tell you honestly whether it belongs in an app, a Function or a lighter script.
— Embedded admin apps with App Bridge and Polaris
— Private and custom single-store apps
— Webhooks, checkout extensions and Shopify Functions
— ERP, CRM and payment API integrations
— App Store submission with Billing API
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