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Shopify Plus development agency — UK

A senior UK development team building on Shopify Plus for scaling brands. Enterprise storefronts, migrations from Magento and Salesforce Commerce, B2B catalogues, and headless commerce — shipped with test coverage, CI/CD, and a team you actually get to work with.

mdlondon Selected work

Horizon — a custom Shopify theme built like a product

For mdlondon, a premium D2C hair tools brand, we built a custom Shopify theme from scratch with a full design token system, automated test infrastructure, and a three-environment CI/CD pipeline. The result is a platform the brand's team owns and iterates on without ongoing agency dependency.

76
Automated tests
36
Visual snapshots
WCAG 2.1 AA
Accessibility
3 envs
CI/CD pipeline
Read the case study →

When Shopify Plus makes sense

Shopify Plus is the right platform for a specific shape of business — brands between one million and several hundred million in annual online revenue that need a scalable commerce engine without the operational overhead of self-hosted alternatives. The signals below are the ones that most often bring teams to us.

Enterprise trading volume

Standard Shopify is limiting checkout behaviour, API rate limits are throttling your ERP sync, or peak-trading events are exposing performance gaps that apps cannot patch. Plus removes those ceilings through checkout extensibility, Shopify Functions, and higher API limits.

B2B alongside D2C

You sell to both direct consumers and trade buyers and want one platform rather than two. Shopify Plus B2B supports company profiles, net terms, custom price lists, and quantity rules natively — replacing the patchwork of apps and separate wholesale stores most mid-market brands end up with.

Headless or composable architecture

Your brand expression, content model, or performance ceiling cannot be met inside a Liquid theme. Hydrogen, Next.js, and composable storefronts against the Shopify Storefront API give you that control — at the cost of real ongoing engineering. A reason worth paying for, not a default.

ERP, PIM, and back-office integration

You are running SAP, NetSuite, Microsoft Dynamics, Akeneo, or a bespoke back-office and need Shopify to be a first-class citizen inside that stack. Integration is where most Shopify implementations fail — we treat it as core delivery rather than a post-launch afterthought.

How we work

Most agencies delegate Shopify Plus work to junior developers with a senior contact on the call. Rogue's team is flat. The engineers writing your Liquid, Functions, and integration code are the engineers on your weekly standups — not account managers relaying requirements downstream. That is the single biggest operational difference between a Plus build that ships on time and one that drifts.

We ship with test coverage and CI/CD from day one. Every Plus store we build has automated tests, visual regression snapshots, and a staging environment that mirrors production — because any theme without those things silently accumulates regressions that cost conversion over time. This is not premium polish; it is how responsible software is written.

And we build to leave. Engagements end when your team can maintain what we have built without us — that is the point. If you want a retainer that never lets you off, we are the wrong shop. If you want a partner who makes your in-house team better and then steps back to an advisory footprint, that is the shape we work in.

Where we help

  • Shopify Plus platform rebuilds and new-store builds with custom themes and Online Store 2.0 architecture
  • Migrations to Shopify Plus from Magento, BigCommerce, Salesforce Commerce Cloud, WooCommerce, and bespoke platforms
  • B2B commerce — company profiles, net terms, custom price lists, trade portals, approval workflows
  • Headless and composable storefronts on Hydrogen, Next.js, Sanity, and Contentful against the Shopify Storefront API
  • SEO preservation and technical SEO during and after migration — URL strategy, redirect plans, canonical setup, Core Web Vitals
  • Shopify Functions, checkout UI extensions, and Shopify Flow automations that replace fragile third-party apps
  • ERP, PIM, WMS, and CRM integrations against Shopify's Admin and Storefront APIs
  • CI/CD, test automation, and the deployment infrastructure that makes Plus stores safe to change

Our approach

The full thinking behind our Shopify Plus work is covered across our ecommerce insights — start with our Shopify Plus guide for pricing, features, and the honest case for upgrading from Shopify Advanced. If you are weighing a migration, the Magento to Shopify migration playbook covers the replatform mechanics, and the B2B on Shopify piece breaks down when native B2B is enough and when it is not.

For teams evaluating headless, the headless commerce guide lays out the trade-offs honestly — going headless is a commitment, not a default. And the Shopify SEO guide covers the organic revenue side, which is usually where replatform projects either protect their margin or quietly lose it.

Related reading

Shopify Plus: Pricing, Features & What to Expect in 2026

The complete guide — cost, features, and how it compares to Advanced.

Magento to Shopify Plus migration

The replatform playbook — URL strategy, data mapping, integration rebuilds.

B2B ecommerce on Shopify

Where native B2B is enough and where you need to build extension work.

Headless commerce — honest trade-offs

Hydrogen, Next.js, and composable storefronts against Shopify APIs.

Shopify SEO guide

Organic revenue on Shopify — technical SEO, product pages, architecture.

Shopify Plus vs BigCommerce

The mid-market platform comparison that most brands actually need.

Frequently Asked Questions

Do you build on Shopify Plus? +
Yes. Shopify Plus is our primary commercial ecommerce platform. We build new stores from the ground up, rebuild existing stores on to Plus, and work alongside in-house teams as an embedded development partner. We are not a Shopify Plus Partner and do not claim partner tier — what we bring is a senior team that ships production-grade Shopify Plus builds with test coverage and CI/CD, not an account manager who subcontracts the work.
Can you migrate us from Magento, BigCommerce, or Salesforce Commerce? +
Yes. Most Shopify Plus briefs that reach us are migrations rather than greenfield builds. We handle data mapping, URL and redirect strategy, integration rebuilds against ERP and PIM systems, and the SEO preservation work that determines whether organic revenue survives the move. We have migrated complex catalogues with thousands of SKUs, custom pricing rules, and legacy integrations without losing ranking or disrupting trading.
How long does a Shopify Plus rebuild take? +
A clean rebuild for a single-storefront mid-market brand typically lands in twelve to sixteen weeks from kick-off. Migrations from Magento or Salesforce Commerce with ERP and PIM integrations usually run sixteen to twenty-four weeks. Headless builds add four to eight weeks depending on frontend complexity and content model. We scope every engagement against concrete delivery milestones rather than open-ended retainers.
Do you handle B2B on Shopify Plus? +
Yes. Shopify Plus B2B has matured into a capable platform for company profiles, custom price lists, net payment terms, quantity rules, and draft orders. We build trade portals and wholesale experiences that share a single store with the D2C brand, or as standalone B2B instances where the buyer journey is separate. Where native B2B does not cover the requirement — punchout, complex approvals, bespoke quoting — we build the extension work needed to make it fit.
Do you work with UK agencies or direct with brands? +
Both. Roughly half of our Shopify Plus engagements are direct with brands and half are as a development partner for UK agencies that need senior engineering capacity without the overhead of building it in-house. Agency engagements are set up with clear attribution rules and a single point of contact — we work to the agency's brand with the brand's client, not the other way around.
What happens to our SEO during a migration? +
SEO preservation is one of the highest-risk areas of any replatform and one we plan for from day one. That means URL mapping signed off before any product moves, a 301 redirect strategy that covers every indexed URL, canonical and hreflang setup on the new store, XML sitemap rebuilds, and post-launch monitoring for ranking and indexation regressions. Short-term fluctuation is normal. Significant ranking loss usually traces back to rushed redirects or broken product URLs — both of which are avoidable.
What does a Shopify Plus engagement cost? +
Our Build & Deliver engagements start at £35,000 per month for a dedicated team, which is the right shape for most Shopify Plus rebuilds and migrations. Advisory work — architecture reviews, migration feasibility, platform selection — starts at £15,000 per month and is a useful way to validate scope before committing to a full build. Engagements are scoped to the work rather than sold as rigid packages, and we will give you a real number on a first call rather than after a paid discovery phase.

Shopify Plus build or migration on the horizon?

Tell us what you are building, what you are moving from, and where the current setup is falling down. We will tell you honestly whether Plus is the right answer and what it will take to do it properly.

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