Custom Shopify Development

When off-the-shelf themes and App Store plugins can’t do what your business requires, we build it. Checkout Extensibility, Shopify Functions, private apps, B2B account logic, and headless Hydrogen storefronts — engineered to your exact specification.

Real custom development at every layer of the Shopify stack

There’s a category of Shopify agency that calls installing three apps and writing a theme section “custom development.” It’s not. Real custom development means writing Shopify Functions to override discount and delivery logic at the platform level, building App Bridge extensions that integrate directly with your ERP or 3PL, or architecting a headless storefront that serves a B2B catalog the standard Liquid stack simply cannot express.

We work at every layer of the Shopify Plus stack: Checkout Extensibility for the new checkout, Shopify Functions for serverless logic, Hydrogen and Oxygen for headless React storefronts, and Admin API integrations for custom fulfillment and B2B pricing workflows. The architecture is designed from day one for what your business actually needs.

Development beyond the theme layer

Checkout Extensibility

Checkout UI Extensions, Checkout Blocks, and post-purchase extensions built for the new Shopify checkout. Custom fields, upsells, branded UI, and validation logic — without touching checkout.liquid, which Shopify is phasing out.

Custom Shopify Apps

Private apps for ERP sync, fulfillment workflows, custom pricing engines, and loyalty integrations. Public apps for wider distribution. Written against current Shopify app patterns — OAuth, webhooks, GraphQL Admin and Storefront APIs.

B2B Storefronts

Shopify Plus B2B: company accounts, location-based price lists, net-payment terms, draft order workflows, and catalog segmentation. Purpose-built for manufacturers, wholesalers, and distributors with complex trade-customer requirements.

Headless Hydrogen Builds

React storefronts on Shopify’s Hydrogen framework, deployed to Oxygen. Full control over the rendering layer for performance-critical or highly branded storefronts that the Liquid template engine constrains.

Frequently asked questions

What can be customized on Shopify Plus that isn't possible on standard Shopify?

Shopify Plus unlocks several capabilities standard plans restrict: Checkout Extensibility (custom checkout UI, fields, and validation), Shopify Functions (server-side logic for discounts, delivery, and payment filtering), B2B company accounts with price lists and net-payment terms, multiple storefronts from one admin, and higher API rate limits for complex integrations. You also get access to the Shopify Plus Partner program — agencies with Plus expertise that standard merchants can't engage.

When should I choose custom development over an App Store app?

App Store apps are the right answer when the functionality is standard and the app is well-maintained. Custom development makes sense when: the logic is proprietary to your business (custom pricing rules, complex B2B workflows), the app introduces performance overhead you can't tolerate, you need deep integration with a system the app doesn't support, or the monthly app fee at scale exceeds the cost of building it. We scope both options and recommend based on your actual requirements.

What's the difference between Shopify Functions and custom apps?

Shopify Functions are small, sandboxed WebAssembly modules that run inside Shopify's infrastructure to override specific platform behaviors — discount calculations, delivery options, payment method filtering. They're serverless and have no infrastructure to manage. Custom apps run on your own (or our) hosting, communicate with Shopify via API, and can do far more — but they introduce latency, infrastructure costs, and operational complexity. We scope both options and recommend the right approach for each piece of logic.

Headless Shopify — when is it actually worth it?

Headless is worth the investment when the Liquid rendering layer is genuinely the constraint: you need sub-second LCP on high-traffic pages, a deeply custom UI that the theme system can't express, or a single commerce backend serving multiple storefronts (DTC and B2B, or multiple markets with radically different UX). For most Shopify Plus stores, a well-optimized Liquid theme outperforms a poorly executed headless build. We'll tell you honestly if headless is the right call for your specific situation.

Build what your business actually requires

Tell us what you need to do that Shopify’s standard layer can’t handle. We’ll scope the right approach — Functions, app, or headless — and show you what’s buildable.