Shopify Store Design & Development

We built our own ecommerce platforms. Now we build yours on Shopify and Shopify Plus.

Dewsign is a Shopify design and development agency with roots going back to 1999.

Before Shopify existed, before SaaS ecommerce was even a concept, we were building our own content management systems, ecommerce platforms and business management software from the ground up.

We've written the code that powers product catalogues, payment processing, order management and inventory systems — not as an academic exercise, but as commercial software used by real businesses.

That history matters because it shapes every decision we make today.

When we evaluate a Shopify theme, we understand what's happening under the surface. When we configure an app, we know how it connects to the broader data architecture. When a client needs something that doesn't exist off the shelf, we have the technical depth to build it. We've seen the full stack from the bare metal up, and that perspective is something other agencies may not be able to offer.

We work with ambitious retailers and growing brands, typically those with a turnover between £1M and £10M, who need a Shopify partner with genuine technical depth. Whether you're launching a new store, rebuilding an underperforming one, or migrating from another platform, we design and develop Shopify stores that are built to convert, built to scale, and built to last.

A Smarter Approach to Shopify Development

Some agencies will sell you a fully custom theme built from scratch. It sounds impressive, but here's what they won't tell you: a from-scratch build takes longer, costs more, and gives you a codebase that only that agency can maintain.

When Shopify releases platform updates, you're waiting for your developer to catch up rather than benefiting automatically. And the uncomfortable truth is that most custom-built themes are less thoroughly tested than the leading commercial themes, which have been refined across thousands of live stores.

We take a different approach — not because we can't build from scratch (we've built entire ecommerce platforms from nothing), but because we've done this long enough to know what actually delivers the best results for our clients.

We start with a proven, high-performance Shopify theme, selected specifically for your product range, catalogue complexity and commercial requirements. Then we make it yours. Custom design work, bespoke sections, tailored functionality, brand-specific UX — everything that makes your store look and feel completely unique to your business.

But it's built on a foundation that's been stress-tested across thousands of stores and is maintained by dedicated theme developers working in lockstep with Shopify's own platform releases.

This isn't a shortcut. It's a better architecture.

Your investment goes into the work that actually differentiates your store — design, user experience, custom functionality and integrations — rather than reinventing structural foundations that specialist theme developers have already perfected.

The result is a store that launches faster, costs less to maintain, benefits from ongoing theme updates, and still looks and performs like a completely bespoke build. For retailers with complex product ranges, we layer on advanced filtering, custom product configurators, dynamic pricing displays and tailored collection pages that go well beyond what any theme provides out of the box.

Why This Approach Is Better for Your Business

Some agencies focus with 'custom builds from scratch'. An agency with over 25 years of experience, one that has designed and built its own CMS platforms, ecommerce engines and business management systems, has the confidence to say: we've tried every approach, and all things considered, this is what actually works.

When you build on a proven theme foundation, you get faster time to market because we're focusing on what makes your store unique, not rebuilding the basics.

You get lower long-term maintenance costs because theme updates, security patches and Shopify compatibility are handled by the theme's own development team. You get better out-of-the-box performance because leading themes are optimised for Core Web Vitals and conversion by teams who do nothing else.

And you get independence — you're not locked into a proprietary codebase that only one agency can work on.

Our job is to give you the best possible Shopify store for your investment. Sometimes that means extensive customisation on top of a premium theme.

Occasionally, for projects requiring highly specialised functionality, it means building bespoke elements from the ground up using Liquid, Shopify's APIs and custom app development. We have the technical depth to do either — and the experience to know which approach is right for your specific situation.

UX and UI Design for Shopify

Great ecommerce design is not about aesthetics alone. It's about guiding your customers from landing page to checkout with as little friction as possible. Our design process is rooted in user experience research and conversion best practices, informed by over two decades of building stores that actually sell.

We design every interface with mobile-first principles, logical navigation hierarchies and clear visual cues that drive action. From product page layouts that reduce decision fatigue to checkout flows that minimise abandonment, every pixel serves a commercial purpose.

If you're running an existing Shopify store that isn't converting as well as it should, our UX audits identify the friction points and our design team delivers solutions that measurably improve performance.

Deep Technical Capability When You Need It

Because we've spent 25 years building ecommerce systems, including our own platforms, content management systems and business management software; we understand the full technical landscape, not just the Shopify layer.

This means we know exactly when to use an existing app, when to configure a theme feature, and when to build something custom.

Our development capabilities include custom integrations using Shopify's Admin, Storefront and Ajax APIs, bespoke app development for functionality that no off-the-shelf solution can deliver, Shopify Flow automations to streamline your operations, and checkout customisations for Shopify Plus merchants.

We don't reach for custom code as the first option — but when it's the right option, we have the rare depth to deliver it confidently.

The App Ecosystem, Done Right

Shopify's strength lies partly in its app ecosystem, but choosing the wrong apps, or too many of them can slow your store, create conflicts and increase your monthly costs unnecessarily.

Having built our own ecommerce and business management platforms, we understand what these apps are doing under the surface. We know which ones are well-engineered and which are held together with string.

We partner with the platforms that have proven themselves: Klaviyo for email marketing and SMS, Gorgias for customer service, Recharge for subscription management, and Yotpo for reviews and loyalty. We also use other related Apps then the project requires it.

We don't just install these apps. We configure them properly, integrate them with your store's data, and ensure they work together as a cohesive retention and conversion stack.

Proven Results for Serious Retailers

Our work spans independent retailers, heritage brands and fast-growth ecommerce businesses across the UK and internationally. Here are a few examples of what we deliver:

Stovefitter's: A complex Shopify build with significant custom functionality including advanced product configuration, bespoke calculators and tailored checkout logic — the kind of project where our deep technical heritage comes into its own.

Pashley Cycles: Bespoke product pages designed to showcase a heritage brand's craftsmanship, with custom features that reflect the premium positioning of the product range.

Bazaar Foods: A full rebrand and Shopify build, migrating from Wix to a platform that could support the business's growth ambitions with a distinctive new brand identity.

See more examples from our portfolio page.