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Shopify Development Agency and Developers

Specialist UK Shopify developers and Shopify experts, building fast, scalable stores that convert for DTC and B2B brands.

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UK Shopify Experts, Focused Only on Shopify

Our developers work exclusively with Shopify. We have been a certified Shopify Partner and Expert since 2018, and every member of our development team works with Shopify's codebase every day. This focus means we understand the platform's architecture, its capabilities, and its constraints at a depth that generalist web developers cannot match.

We build custom themes using Shopify's Liquid templating language and Online Store 2.0 sections architecture, integrate third-party tools and APIs, customise checkouts on Shopify Plus, and migrate stores from other platforms. Our developers are proficient in HTML, CSS, JavaScript, Liquid, and Ruby, and work closely with our design and SEO teams to ensure every build is fast, accessible, and optimised for search.

We offer both ad-hoc development work and ongoing retainer contracts. We are not a cheap outsourcing agency. Our pricing is transparent, our team is in-house, and our focus is on long-term client relationships built on consistent, high-quality delivery. See our Shopify packages for pricing details.

How We Build Shopify Stores

Every store we build follows Shopify's best-practice coding standards for SEO, accessibility, responsiveness, and speed. We use Online Store 2.0 architecture so your store's sections, blocks, and metafields are manageable through the theme editor without needing a developer for every content change.

That matters more than it sounds: of 265 Shopify stores we have audited, 196 were still on legacy themes that predate Online Store 2.0, and moving stores onto Online Store 2.0 themes has produced an average gain of 23 points in mobile PageSpeed.

Our development process integrates design and SEO from the start rather than treating them as separate phases. This means your store launches with clean code, fast load times, proper structured data, and a design that converts, rather than requiring post-launch fixes for problems that could have been avoided during the build.

Shopify Agency - SEO Agency

Why Hire a Specialist Shopify Developer?

Shopify simplifies launching an online store, but unlocking its full potential requires platform-specific development expertise. A specialist Shopify developer delivers custom functionality tailored to your business needs, faster implementation with fewer technical issues, a store optimised for speed, conversion, and SEO from the code level, clean integrations with third-party tools that do not degrade performance, and ongoing support from a team that understands every layer of your store's architecture.

For most merchants, hiring a specialist Shopify agency is more cost-effective than building an in-house development team, and delivers stronger results because the agency's accumulated platform experience benefits every project. For guidance on evaluating Shopify agencies, see our guide on how to choose the best Shopify development company.

Shopify Agency - SEO Agency
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Our Shopify Web Development Services

Custom Shopify Theme Development: We build themes from scratch using Liquid, HTML, CSS, and JavaScript on the Online Store 2.0 architecture. Every theme is responsive, fast-loading, and designed to give your team full control through the Shopify theme editor.

Platform Migrations: We migrate stores from WooCommerce, Magento, Squarespace, and BigCommerce to Shopify, preserving products, customers, order history, and SEO rankings through comprehensive redirect mapping. For platform-specific migration detail, see our comparison guides: WooCommerce vs Shopify, Magento vs Shopify, Squarespace vs Shopify, BigCommerce vs Shopify. Planning a move? Our Shopify migration checklist and our guide to Shopify migration costs cover the process and the budget.

Custom User Journey Development: We build personalised user journeys aligned with your business goals, using analytics data to reduce clicks to checkout and maximise conversion rate.

Shopify Agency - SEO Agency

Checkout and Cart Customisation

The checkout is where revenue is won or lost. For Shopify Plus merchants, we build custom checkout experiences using checkout extensibility and Shopify Functions, including tiered discounts, free product thresholds, upsells, and personalised offers.

Even on standard Shopify plans, there are significant optimisation opportunities: cart page layout improvements, trust signal placement, shipping cost transparency, and express checkout configuration. Small development adjustments at the checkout stage consistently deliver measurable conversion improvements.

For more on how checkout and cart optimisation affects conversion rate, see our guide on how to increase Shopify conversions.

Shopify Agency - SEO Agency

Testing and Performance

Every build goes through comprehensive testing across devices, browsers, and screen sizes before launch. We test functionality, usability, page speed, and Core Web Vitals to ensure your store performs consistently for every visitor.

Our developers build with performance in mind from the first line of code: compressed images, deferred scripts, minimal render-blocking resources, and efficient Liquid code that does not slow down page loads. For more on how page speed affects Shopify stores, see our article on why Shopify's page speed test is misleading.

Shopify Agency - SEO Agency

SEO-First Development

SEO is not an afterthought we add after the build. It is integrated into our development process from the start. Our developers implement proper heading hierarchy, structured data (product, review, FAQ, and breadcrumb schema), clean URL structures, optimised image loading, and semantic HTML that search engines can parse effectively.

This development-level SEO foundation means your store launches with the technical signals Google needs to crawl, index, and rank your pages, rather than requiring post-launch remediation. For our full SEO service, see our Shopify SEO agency page.

Shopify Agency - SEO Agency

Ongoing Development Support

Launching your store is the first step. As your business grows, you need ongoing development support for new features, app integrations, theme updates, and performance improvements. Our monthly retainers give you continuous access to our development team for both reactive support (bug fixes, urgent changes) and proactive development (new functionality, conversion improvements, seasonal updates).

See our Shopify retainer packages for details on ongoing support options.

Shopify Agency - SEO Agency

Why Choose Us as Your Shopify Web Development Company

We are a small, focused team that works exclusively with Shopify. This means you get direct access to experienced developers rather than being handed off to junior team members. Our developers understand Liquid, Online Store 2.0, Shopify's API ecosystem, checkout extensibility, and the platform's specific SEO requirements.

We handle custom theme builds, third-party integrations (payment gateways, ERPs, CRMs, fulfilment providers), multilingual and multi-currency store configuration through Shopify Markets, Shopify Plus checkout customisation, and custom Shopify app development. If it can be built on Shopify, our team can build it.

Every development project comes with a 3 month guarantee, and retainer clients are billed one month in arrears with no long contracts.

Shopify Agency - SEO Agency

When to Hire a Shopify Developer

You need a Shopify developer when your store requires custom functionality beyond what the theme editor provides, when you are migrating from another platform and need data transfer, redirect mapping, and a new theme build, when app integrations are creating conflicts or performance issues, when your checkout needs customisation to support your business model, or when your store needs ongoing feature development and technical maintenance.

For merchants evaluating whether Shopify or Shopify Plus is the right plan for their business, see our Why Shopify Plus page.

Shopify Agency - SEO Agency

When to Hire a Shopify Expert

Hire a Shopify expert when the question is what to build, not just how to build it. A developer completes a defined task; an expert should also tell you whether the task is worth doing, which is where most budgets are saved or lost.

That usually means the bigger decisions: replatforming, choosing between Shopify plans, untangling an app stack that slows the store, planning B2B or international selling, or rescuing a redesign that cost sales. Bring the expert in before you commit the budget, not after.

To check one, look them up in the Shopify Partner Directory. Shopify only lets partners ask for a review once the merchant has given them collaborator access and they have worked together for more than a week, so reviews come from real projects. We are a Shopify Select partner with Verified Skills across development and marketing.

Shopify expert reviewing a store plan

Hire a Shopify Web Developer

To hire a Shopify web developer from our team, tell us what you need and we will reply within 24 hours. Shopify's own advice on hiring Partners is to define your budget, timeline and expected outcomes in detail first, so the quote is accurate.

We then work in your store through a collaborator account, the access route Shopify describes for Partners. You can remove it whenever you like, and it expires on its own if unused for 90 days. One off tasks are charged at our ad hoc rate, and regular work sits on a retainer from £650 a month plus VAT, billed one month in arrears.

Most store problems need a developer rather than Shopify: of the last 10 support requests from our client stores, 7 were theme, app or integration problems that Shopify Support does not handle.

Shopify web developer working on store code

Shopify Plus Developers

For enterprise merchants, Shopify Plus provides advanced capabilities including custom checkout, Shopify Flow automation, B2B channels, multi-store management, and dedicated support. As a Shopify Plus agency, we help brands upgrade from standard Shopify to Plus or migrate from other enterprise platforms. If you are weighing a custom front end, our guide to headless Shopify explains when it pays off.

Talk to our Shopify Plus developers about your requirements.

Shopify Agency - SEO Agency

Shopify App Developers for Custom Apps

As Shopify app developers, we build custom apps when no App Store app does the job, or when one would cost more each month than building your own. Typical jobs include connecting an ERP or warehouse system and automating trade orders.

Shopify's app distribution rules shape the build. A Shopify custom app installs on a single store, or on stores in the same Plus organisation, and needs no App Store review, while a public app needs Shopify's approval and can be installed by many stores. New apps can no longer be created in the Shopify admin, though existing ones keep working.

The payoff can be large: a trade portal we built for a fizzy drinks client cut the time spent keying trade orders from five hours a week to 30 minutes a month. What an app developer costs depends on scope, so we quote each app once we have seen your requirements.

Custom Shopify app built from separate parts

Frequently Asked Questions

How much do your Shopify developers cost?

We offer two pricing tiers: ad-hoc rates for one-off tasks and retainer rates for ongoing work. Retainers are significantly more cost effective, and start from £650 a month plus VAT. See our Shopify packages for detailed retainer pricing. For build projects, our guide to how much it costs to build a Shopify store sets out typical budgets.

What programming languages do your developers use?

Our developers work with HTML, CSS, JavaScript, Liquid (Shopify's templating language), Ruby (for backend scripts and apps), and Node.js. We also work with Shopify's GraphQL and REST APIs for custom integrations and app development.

Can you build custom Shopify apps?

Yes. We build both public apps (for the Shopify App Store) and custom apps (functionality built for your store only). Contact us with your requirements for a personalised quote.

Can you migrate my store from another platform to Shopify?

Yes. We migrate stores from WooCommerce, Magento, Squarespace, and BigCommerce, including full data transfer, SEO redirect mapping, and custom theme design for the new Shopify store.

Do you offer ongoing development support after the initial build?

Yes. Most of our client relationships extend into ongoing monthly retainers covering development, bug fixes, new features, and performance optimisation. Our retainers include dedicated monthly hours with priority access to our development team.

Should I hire a freelance Shopify developer or an agency?

A freelance Shopify web developer can suit small, well defined tasks. An agency suits builds and ongoing work that need design, development and SEO together, cover when someone is away and accountability for the result. Our developers work alongside our designers and SEO team, and every development project comes with a 3 month guarantee.

Are you an official Shopify Partner?

Yes. We have been a Shopify Partner since 2018 and are now a Shopify Select partner, with Verified Skills across development and marketing. Learn more about what Shopify Partner status means for merchants.

Shopify web development

A Shopify site built to sell.

Fast, conversion focused Shopify builds and migrations backed by a 3 month guarantee, with retainers from £650 a month plus VAT when you need ongoing help.

Or email info@whymatters.co.uk. We reply within 24 hours.

Book a 30 minute call

Pick a time that suits you and the call is booked. No forms to chase, no obligation.

  • 1Pick a time. Calls are 30 minutes, Monday to Friday, over video.
  • 2Tell us about your store. We ask for your name, email, phone number and what you would like to talk about.
  • 3Talk it through. You get our view and next steps, with no obligation and no sales pitch.
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