Shopify & Shopify Plus
Engineering articles on Shopify Plus, custom apps, Checkout Extensions, Functions, Hydrogen, Flow, and B2B.
50 articles
Klarna Clearpay BNPL Engineering: A UK Shopify Guide (2026)
Handling £100+ AOVs with Klarna and Clearpay — how to engineer robust capture, refund, and reconciliation pipelines on Shopify Plus in 2026.
Royal Mail API Integration Shopify: UK Carrier Patterns (2026)
Royal Mail API integration for Shopify — Pro Shipping vs Click & Drop, plus Evri and DPD UK patterns for sub-200ms label flows and rate shopping (2026).
Stripe Connect: Engineering Marketplace Payments (2026)
Stripe Connect custom vs express models — how to build a multi-seller payment engine with £0.20 payouts and automated split logic in 2026.
Shopify Returns RMA Integration: Engineering Custom Flows (2026)
A production-grade shopify returns rma integration requires idempotent middleware — prevent inventory drift and stop double-refund bugs in 2026.
Shopify Editions Spring 2026: Rebuilt Hydrogen & UCP
With 150+ updates, Shopify Editions Spring 2026 decouples Hydrogen from Remix and pushes B2B features to all plans — what engineers must build in 2026.
Klaviyo Deliverability Shopify: Engineering Guide (2026)
Optimise your klaviyo deliverability shopify setup with a 100% aligned domain — debug webhook latency and secure inbox rates — 2026 guide.
Apple Pay Google Pay eCommerce 2026: Native vs Headless Guide
Native and headless wallet wiring contrasted — configure Apple Pay and Google Pay across Next.js and Liquid with under 100ms checkout latency in 2026.
Supabase Shopify Backend: Side-Car Architecture (2026)
Why a £30K-£120K headless build needs a dedicated DB — modelling custom schemas and real-time inventory with a Supabase Shopify backend in 2026.
Recharge vs Shopify Subscriptions: 2026 Engineering Guide
Recharge vs Shopify Subscriptions in 2026 — an engineering breakdown of API limits, payment token migrations, and the £100K GMV threshold where native fails.
Magento to Shopify Migration: Replatform Timeline (2026)
A Magento to Shopify migration typically costs £30K-£120K — how to execute the replatform, map EAV data, and preserve SEO rankings in 2026.
Shopify Hydrogen Blue Green Deploy: Zero-Downtime Guide (2026)
Oxygen vs Vercel edge latency comparison — how to run a shopify hydrogen blue green deploy with a 10% canary split for zero-downtime releases in 2026.
Adyen vs Stripe UK: Enterprise Payment Guide (2026)
Choosing Adyen vs Stripe UK for a £10M+ GMV store — why interchange++ pricing and fraud platform depth dictate your checkout margin in 2026.
Shopify Hydrogen Winter 2026: Production Migration Guide
Migrating from Remix to React Router v7 in Shopify Hydrogen Winter 2026 can cut build times by roughly 30% — here is our technical playbook.
Shopify Customer Accounts API: Passwordless in Production (2026)
A 35% drop in login friction with the shopify customer accounts api — how to implement passwordless login and UI extensions in 2026.
Server-Side Tracking on Shopify Plus: GTM + Stape (2026)
Server-side tracking on Shopify Plus in 2026 — GTM server container, Stape vs self-hosted, Meta CAPI, Google Ads enhanced conversions migration steps.
Shopify CLI 4.0 Breaking Changes: Engineering Migration (2026)
Shopify CLI 4.0 ships SemVer, auto-upgrades, --force flag removal. CI/CD migration steps + the deprecated commands you must replace in 2026.
Anchor Loyalty is Live on the Shopify App Store (2026)
Anchor Loyalty & Rewards is now on the Shopify App Store. Points, VIP tiers, two-sided referrals, and a signed API for Hydrogen and headless stores.
Storefront API Cart Warnings: Handling Location Restrictions (2026)
The new PRODUCT_UNAVAILABLE_IN_BUYER_LOCATION warning code — handle cross-border cart state without leaking conversion — required for headless builds in 2026.
Shopify GraphQL Admin API: Production Rate Limit Strategy (2026)
How to manage Shopify GraphQL rate limits — handle the 1,000-point standard bucket, throttleStatus retries, and Bulk Operations — in 2026.
Shopify Dropshipping at Scale: When DIY Apps Break (2026)
The 3 breaking points of Shopify for dropshipping — why DSers and Spocket drop orders at 500/day — and how to build custom middleware in 2026.
Shopify Quietly Auto-Shipped /llms.txt, /agents.md and /.well-known/ucp — Engineering Override Guide (2026)
Shopify now ships /llms.txt, /agents.md and /.well-known/ucp by default. Engineering guide: defaults, overrides via templates/llms.txt.liquid, Markets fixes, CI.
Shopify AI Toolkit in Production: 19 Skills and Safe Execution (2026)
The 19 skills in the Shopify AI Toolkit — how to safely scope the --allow-mutations flag and run Claude Code against live stores — 2026 engineering guide.
Hydrogen MCP → UCP Migration: Production Cutover Before June 15
Storefront Catalog MCP became UCP on April 22, 2026. The endpoint, tool names, and response schema all changed. Migration steps for Hydrogen before June 15.
What is Shopify Plus: UK Engineering Decision Guide (2026)
What is Shopify Plus? A direct breakdown of UK pricing (typically £1,800/month), the 11 million Wasm instruction limit, and when the platform pays off in 2026.
OpenAI Privacy Filter: Production Implementation Guide (2026)
How to deploy OpenAI's 1.5B parameter Privacy Filter in your Shopify stack to redact PII, secure API keys, and maintain UK GDPR compliance in 2026.
Introducing GPT-5.5: Engineering Agentic Commerce (2026)
Introducing GPT-5.5 and the Agentic Commerce Protocol — how 1M-token context windows turn ChatGPT into a native checkout channel for Shopify Plus — 2026.
Shopify Dev Assistant in Production: Engineering Workflow Efficiency
An engineering perspective on integrating the Shopify Dev Assistant and MCP server into production teams to streamline Shopify Functions and Polaris development.
Shopify Flow AI Assistant Prompt Guide & Agent Trigger Patterns
Copy-paste prompts for the Shopify Flow AI assistant — email-chain automation, VIP tagging, fraud holds — plus the flowTriggerReceive agent-trigger architecture.
Catalyst vs Hydrogen 2026: Next.js vs Remix Headless Compared
BigCommerce Catalyst (Next.js) vs Shopify Hydrogen (Remix): 2026 performance, build cost and hosting trade-offs, and which headless framework fits your build.
Scaling Shopify Storefront MCP in Production
Auth, caching, rate-limiting, and multi-tenancy patterns for a Shopify Storefront MCP server — what scales, what breaks under bursty agent traffic.
Shopify Functions in Production 2026: 5 Patterns That Scale
Five Shopify Functions patterns that survived Black Friday 2026: binary testing, metaobject access, the 11M instruction budget, cart-transform caching, deployment workflow.
Shopify MCP Server: Production Implementation Guide (2026)
Shopify MCP server setup: 4 native servers (Storefront, Customer Account, Checkout, Dev), verification from Claude and Cursor, and custom build cost £15K-£45K in 2026.
Optimising Shopify for AI Search: ChatGPT & Perplexity
ChatGPT Shopping, Perplexity Shop, and Google AI Mode recommend products directly. The structured data, feeds, and on-page signals that move the needle in 2026.
Shopify Plus Official UK Pricing 2026: From £1,800/mo Real Costs
Official Shopify Plus pricing for UK 2026: base licence from £1,800/mo, GMV-tier scaling, app stack, retainer, and the year-one hidden costs Shopify's official price list doesn't show.
Salesforce Commerce Cloud vs Shopify Plus
When SFCC justifies its cost over Shopify Plus and when it doesn’t — TCO ranges, integration depth, B2B/B2C complexity, and the migration math for 2026.
How Much Does a Shopify Custom App Cost to Build?
What a Shopify custom app actually costs in 2026 — £4K to £250K+ ranges, the six variables that move the price, and the scoping questions that produce a firm number.
Integrating Shopify with NetSuite: A Practical Guide
The most common integration we build. Here's how to get orders, inventory, and customer data flowing reliably between Shopify and NetSuite.
Shopify Hydrogen 2.0: Is It Finally Production-Ready?
Hydrogen 2.0 in 2026 — what’s mature, what still bites, and whether the Remix + Oxygen stack is finally ready for production Shopify Plus storefronts.
Building Subscriptions on Shopify: What Actually Works
A practical guide to building subscription commerce on Shopify — comparing apps, custom builds, and the trade-offs of each approach.
Shopify Flow: Beyond the Basics
Advanced Shopify Flow automation patterns that replace expensive apps and save hours of manual work every week.
Shopify's 100 Variant Limit: Real Solutions That Work
Practical solutions for Shopify's 100 variant limit, from combined listings to custom apps. We explain when each approach makes sense.
Year/Make/Model Filtering on Shopify for Auto Parts (2026)
Build Year/Make/Model fitment filtering on Shopify with metaobjects and metafields — the data model, search layer, ACES/PIES, and what it costs. A 2026 engineering guide.
TikTok Shop and Shopify: What Brands Need to Know
TikTok Shop is growing fast. Here's what we've learned about integrating it with Shopify and whether it's worth the effort.
Shopify Checkout Extensions: What You Can Do Now
The old checkout.liquid is gone. Here's what Checkout Extensibility actually lets you do, with examples from real projects.
Selling Internationally: Markets vs Multi-Store
Should you use Shopify Markets or run separate stores for each country? Here's how to decide based on your actual situation.
BigCommerce or Shopify? How to Actually Decide
We work with both platforms daily. Neither is better—they're different. Here's how to choose the right one for your situation.
Your Shopify Store Is Probably Slow
Most Shopify stores we audit have the same problems: too many apps, bloated themes, and unoptimised images. Here's how to fix them.
Running B2B on Shopify Plus: What Works
Shopify's B2B features have matured significantly. Here's what works well, what still needs workarounds, and how to set it up properly.
Building Anchor: What We Learned About Loyalty Apps
Most loyalty apps feel bolted-on. We spent six months figuring out how to build one that actually fits into the Shopify experience.
When Does Shopify Plus Actually Make Sense?
When does Shopify Plus actually make sense? The Plus-only capabilities, an honest cost breakdown, and the revenue band where the upgrade pays back. 2026 guide.