A living collaboration across UX, development and CRO, with 65.2% yearly revenue growth.
SHOPIFY
AGENCYfor fashion & lifestyle brands
Certified Shopify Plus Partner · Est. 2017
MM Shopy Devs is a Shopify and Shopify Plus agency for fashion, lifestyle and luxury brands. The same senior team designs, builds and grows your store, from first launch to sustained growth. Every decision answers one question: does it help your store sell?
Trusted by ambitious brands across the UK, Spain, Europe, USA and Latin America
Rated 5.0 ★ on Google · Rated 5.0 ★ from 61 reviews in the Shopify Partner Directory
Results our clients can measure
- $350m+
- Client revenue generated
- 38.5%
- Higher conversion*
- 15-18%
- AOV uplift*
- 120+
- Shopify stores built
* Average across 15 client projects, 2023–2025.
Services
Everything your store needs, at every stage
Most agencies either build stores or grow them. We do both. A well built store is the foundation, and what happens after launch decides whether a brand scales. Our services cover the full journey.
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Shopify Store Setup
A premium theme, configured properly and launch-ready in 3-4 weeks.
- Premium theme install & setup
- Domain & Branding setup
- Payment & Shipping setup
- Team training & Tutorials
Learn more: Shopify Store SetupFrom
£2,000 / project
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Premium Store Setup
A theme foundation with custom UX and a hands-on, collaborative process. 6-10 weeks.
Everything in Shopify Store Setup, plus:
- Custom UX/UI sections
- Added theme functionality
- Multi-device QA testing
- Post-launch bug support
Learn more: Premium Store SetupFrom
£5,000 / project
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Custom Theme Development
A fully bespoke theme, built from scratch and made to convert. 12-20 weeks.
Fully bespoke, from scratch:
- No premium theme purchase
- Complete UX design
- Unlimited custom functionality
Learn more: Custom Theme DevelopmentFrom
£30,000 / project
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Shopify Development
Your current theme, enhanced with custom design and development. No minimum, so single small tasks are welcome.
- Custom sections, blocks & megamenus
- Product card & UX redesign
- Multi-device testing
- Team training & handover
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Shopify Design
A complete visual and UX refresh, delivered on your live store without losing traffic or sales.
Everything in Shopify Development, plus:
- Full UX/UI redesign, store-wide
- New theme included, if needed
- Consistent design system
- Performance-first architecture
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Migration to Shopify
Move from Magento, WooCommerce, PrestaShop or anywhere else, with no lost data and no lost rankings.
- Full data migration: products, orders, customers
- SEO-safe move, with redirects
- New theme, customised or fully custom
- Shopify training & ongoing support
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Full Redesign or Facelift
Conversion focused store design for fashion and lifestyle brands.
- UX research and wireframing
- UI design, all devices
- Ecommerce branding and design system
- Developer-ready Figma handoff
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CRO & A/B Testing
Turn more of your existing traffic into revenue with research, testing and changes that actually ship.
- Conversion data review
- Structured A/B and multivariate tests
- Statistical significance before shipping
- Winning variants rolled out permanently
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Store Audit
A fixed-scope diagnostic that pinpoints what is blocking conversions, ranked by impact.
- Full-funnel walkthrough
- UX and CRO expert analysis
- Data and analytics review
- Prioritized action plan
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Support & Maintenance
On-demand help from a senior team, with no long contracts.
- Same-day incident response
- Day-to-day questions, no ticket queue
- App installation and configuration
- Direct line to your dev team
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Case studies
Work we're proud of
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A US store replicated for a European and UK audience, across a vast range and a heavily customised theme.
Industries
MADE FOR FASHION, LIFESTYLE AND LUXURY
We work almost exclusively with fashion, lifestyle and luxury brands, so we already understand what makes selling in these categories different: the weight design carries, a discerning customer, rich product storytelling and the conversion details that turn browsers into buyers.
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Sizing and fit, returns, drops that spike traffic in minutes, variant and colourway UX, and editorial imagery handled properly.
Explore -
02Luxury
Restraint over urgency, made to order and appointment flows, clienteling, and the international duty and delivery complexity that comes with high value orders.
Explore -
03Jewellery
Ring sizing, macro photography and zoom, gemstone and hallmark data, engraving and personalisation, and gifting.
Explore
Why us
A different kind of Shopify agency
Most agencies put layers between you and the people building your store. We don't.
Your task
Quick add on product cards to lift conversion
Account manager
passes it on
Project manager
passes it on
Junior developer
does the work
Direct
MM Shopy Devs
Senior team
does the work
Result
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Senior team, start to finish
No juniors to hand you down to.
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No account layer
Talk to whoever does the work. Same-day answers.
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Fewer projects, on purpose
Senior attention on every one.
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No lock-in
No retainer, no minimum project size.
If you need a hundred person team across six offices, we are not the right fit and we will tell you so. If you want senior people who know your store and answer the phone, that is exactly what this is.
AI
The same senior team, with our own AI system
We built the MM AI System so AI does the repetitive work and our team keeps the decisions. A task is built by AI, checked against our rules and reviewed by a senior before it reaches your store.
−55%
Up to, lower dev cost
3x
Faster delivery
95%+
True to design
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AI Development
New sections, custom themes, redesigns, migrations and CRO, built by AI and checked by our senior team.
Start here if
You have a design or a list of changes and need them built well, fast.
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Design for AI
A Shopify design system AI can read: tokens, sections and annotations that become the rules every build is checked against.
Start here if
You're planning a new theme or a redesign and want it built right first time.
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AI Consultancy
Where AI belongs across your store, operations and management, ranked by impact and cost. Then we build it.
Start here if
You want AI working inside the company, not just on the storefront.
This website was built with it.
From Figma to Production with ClaudeBe found
Build to be found, by people and by AI
A growing share of product research now starts inside an AI assistant rather than a search results page. Those assistants do not see your design. They read your data, and most of them do not run JavaScript at all, so anything your store builds in the browser is invisible to them.
We build with that in mind, as part of the work rather than as an add-on:
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Sizes, materials, specifications and availability marked up so assistants and search engines can actually read them.
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A sizing table trapped in an image is unreadable to everything except a human eye. We build them as structured content, which also makes them accessible.
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Server-rendered pages, so crawlers see the full page on the first request rather than a shell.
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Product, FAQ, breadcrumb and review markup on the pages that need it.
We do not sell SEO as a service, and we will not promise you a place in anyone's AI answers. What we can do is make sure your store is technically capable of being read, cited and recommended, which is the part that sits with the build.
Want AI working across your business?
AI ConsultancyWhere we work
Barcelona base, London roots
We started in London in 2017, working with British brands like Private White VC, and moved to Barcelona in 2020 when the Spanish market was still dominated by legacy platforms. We kept both.
That combination is unusual. Most agencies serving UK brands do not work in Spanish. Most Spanish agencies do not know the UK market. We work across the UK, Spain, Europe and Latin America, in English, Spanish and Italian, with the same senior team on every project.
Partners & stack
The apps we actually install
We test apps on real client stores before we recommend them. This is the shortlist we keep coming back to, with honest notes on what each one does well and where it stops. We mark clearly where we earn a referral, and several of the ones we recommend most pay us nothing.
Blog
What we are writing about
Practical thinking on Shopify, conversion and ecommerce growth, written by the people doing the work.
- October 28, 2026
Shopify Agencies and Retainers: When They Make Sense and When They Don't
Where retainers came from, why Shopify changed the logic behind them, and when a monthly agreement with your agency is really worth it.
- October 20, 2026
How to Use AI to Cut Costs in Your Ecommerce Business (2027)
Most ecommerce brands don't have a growth problem. They have a stack problem.
- October 19, 2026
Shopify Theme Customization with AI MCP: Why It Fails on Complex Builds
We put Shopify theme customization with AI to a real test, from small tweaks to full redesigns. Here's what we found and how we solved it.
Why brands trust us
CERTIFIED PARTNER, INDEPENDENTLY REVIEWED
Rated 5.0 ★ on Google · Rated 5.0 ★ from 61 reviews in the Shopify Partner Directory
FAQs
A Shopify agency designs, builds, customises, migrates and grows stores on Shopify and Shopify Plus. That covers everything from launching a first store to redesigning, optimising and supporting an established one.
Plus Partner status is only awarded to agencies with proven expertise and a consistent track record. For you it means a team with real experience on complex, high-growth projects and a direct working relationship with Shopify.
Both. We launch new stores, and we redesign, customise, optimise and support existing ones. Many clients come to us to grow a store they already have.
Yes. We migrate from Magento, WooCommerce, PrestaShop and other platforms, with no lost data, no lost rankings and no downtime.
It depends on what you need. A store setup runs from £2,000 to £3,000, and a premium setup starts from £5,000. Everything else, including redesigns, custom builds, development, CRO and support, is scoped and quoted per project. There is no minimum project size, so smaller jobs are welcome too.
Typically 3-4 weeks for a launch-ready store on a premium theme. Premium setups take 6-10 weeks, and fully custom builds 12-20 weeks.
No. We take on everything from a single urgent fix to a full custom build.
Instead of a fixed monthly contract, you get a dedicated technical team on demand and pay only for the expert hours your store needs. For enterprises that want a guaranteed stream of work, retainers are available as an option.
It will be built so it can be read by them, which is the part we control. Most AI crawlers do not run JavaScript, so content that loads in the browser is invisible to them. We build server-rendered pages with structured product data, so your products can be read, cited and recommended. Nobody can promise you a place in an AI answer, and we will not.
We specialise in fashion, lifestyle and luxury, including beauty, jewellery and premium goods.
Barcelona base, London roots. We work with brands across the UK, Spain, Europe and Latin America, in English, Spanish and Italian. It is an unusual combination: most agencies serving UK brands do not work in Spanish, and most Spanish agencies do not know the UK market.
Start a project and tell us what you're building. You'll talk directly with a senior Shopify expert, not a sales team.