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Shopify Plus Development

Enterprise Shopify development for merchants who've outgrown standard.

Checkout extensibility, Shopify Functions, multi-market architecture, custom automation, and advanced B2B — for Shopify Plus merchants who need the platform to work the way their business works.

The problem

Where Shopify merchants get stuck

Checkout customizations break on upgrades

checkout.liquid is deprecated. Merchants still on it can't access Checkout Extensibility features. Moving to UI Extensions is the only path forward.

Shopify Functions aren't documented enough to use confidently

Payment customizations, discount logic, and shipping rules are now done in Functions. The documentation is sparse and the local dev tooling is new enough that most generalists avoid it.

Multi-market pricing is a spreadsheet

Selling in multiple currencies and regions means manual price adjustments, broken promotions, and regional SKU proliferation that nobody can maintain.

Shopify Flow isn't enough

The no-code automation covers basic triggers. Complex workflows — conditional logic, external API calls, multi-step sequences — require custom development.

What I build

Specific deliverables — not buzzwords

Checkout Extensibility
  • Checkout UI Extensions (custom fields, upsells, loyalty points)
  • Thank-you and order-status page extensions
  • Checkout Branding API (fully branded checkout)
  • Migration from checkout.liquid
  • Post-purchase extensions
Shopify Functions
  • Custom discount logic (percentage, fixed, BXGY, tiered)
  • Payment method visibility rules
  • Shipping rate customization
  • Cart and checkout validation
  • B2B pricing functions
Platform & Architecture
  • Shopify Markets configuration (multi-currency, multi-language)
  • Shopify Flow custom connectors
  • Multi-store architecture
  • Headless/hybrid builds with Next.js
  • Plus-tier API access and higher rate limits
Technology

Tools used in production — not just listed on a CV

Shopify PlusCheckout UI ExtensionsShopify FunctionsShopify FlowMarkets APINext.jsReactTypeScript
How I work

A process built around no surprises

Discovery

Written scope. Not a verbal promise. Requirements, constraints, integration map, risk flags.

Architecture

Data models, API surface, Shopify feature selection, deployment strategy — before a line of code.

Build

Structured sprints with staging access throughout. You see working software weekly.

Launch

Cross-device testing, load testing, controlled launch, monitoring from day one.

FAQ

Common questions about Shopify Plus

Is Shopify Plus worth the upgrade from Advanced?

For most merchants asking this question, yes — if you need B2B, checkout customization, Shopify Functions, or you're processing high volume. The incremental cost pays for itself quickly at that scale.

Can you migrate us from checkout.liquid to Checkout Extensibility?

Yes. This is an important migration — Shopify has deprecated checkout.liquid and it will eventually be sunset. I audit your existing checkout customizations, rebuild them as UI Extensions, and test on a development store before touching production.

What can Shopify Functions do that apps can't?

Functions run in Shopify's infrastructure at checkout time, with sub-millisecond execution. They can modify discounts, validate carts, filter payment methods, and customize shipping — without any external API call or latency. Apps can't reliably do this at checkout speed.

Do you work with our existing Shopify Plus partner?

Yes. I often work alongside existing agencies or in-house teams as a specialist for Plus-specific work — particularly Functions, Checkout Extensibility, and B2B — where generalist developers don't have the platform depth.

Ready to talk about
your Shopify Plus project?

Tell me what you're building. I'll reply within 24 hours with a clear view on whether I can help and how.