Services - For active stores - Shopify development
Shopify development
A team of senior Shopify developers for theme customisation, custom features, apps and integrations. From a single small change to a full build, you work with the developers directly, with no account layer in between.
- Partner
- Certified Shopify Plus Partner
★★★★★ 5.0 Google · 5.0 Shopify Partners (61) · 120+ stores
What we build
What our Shopify developers build
- 01
Custom themes
Bespoke themes on Shopify 2.0 architecture
Custom Shopify Development - 02
Custom features
Advanced product page behaviour, bundles, configurators, size guidance and merchandising logic.
- 03
Third-party integrations
Connecting the tools you already use — CRMs, ERPs, marketing platforms — so data flows without manual work.
- 04
Commerce app integrations
Subscriptions, loyalty, reviews, search and email, wired properly rather than bolted on.
- 05
Shopify Plus development
Checkout extensibility, Shopify Functions and Markets.
Shopify Plus Agency - 06
Fixes and rescue work
Inherited code that's broken, slow or undocumented.
Theme customisation
Shopify theme customisation and theme development
Most Shopify development is not building something from nothing. It is Liquid, JavaScript and CSS work on the theme that already runs your store: new sections, changed behaviour, features the theme never shipped with. That is the work most brands actually need, and it is where most projects with us start.
What we can change
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New sections and page templates
The ones your theme does not ship with.
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Product page behaviour
Variants, colourways, size guidance, bundles and upsells.
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Collections and filtering
Merchandising, sorting and faceted filters.
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Cart and checkout UX
Drawers, upsells and progress cues. Checkout itself on Shopify Plus.
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Integrations
Apps wired in properly rather than bolted on.
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Design refinements
Spacing, type, hierarchy and mobile detail.
We work with the theme you have
Most themes, including Shopify's own and the premium ones brands usually land on. Also themes another developer has already modified.
- Horizon
- Prestige
- Impulse
- Motion
- Expanse
- Stiletto
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Already have designs?
Figma, a PSD or a designer's handover: we build them into your theme accurately rather than approximating them.
Shopify Design Agency -
Is the theme itself the problem?
We can swap it: your content and settings moved to a new premium theme, without touching code.
If earlier work has left the code in a state where building on it would cost more than replacing it, we will tell you honestly and propose the alternative rather than charge you to patch it.
Two decisions
Changes or a rebuild?
There are really two decisions here, not three. Pick what sounds like your store.
Targeted changes to the theme you run
The theme mostly works and you need specific things fixed or added. Weeks rather than months, and no minimum.
A full rebuild
The theme itself is the constraint, or the store no longer reflects the brand. It is the same bespoke build either way; which page you land on depends only on where you start.
Not sure which side of the line you are on? Send us the list of what you want changed. If it is short, customisation is cheaper and faster and we will say so.
How to hire us
No retainers, no minimum
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No mandatory retainer
Pay for the hours your store needs, when it needs them.
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No minimum project size
From a single urgent fix to a full build. We only ask that small tasks are grouped so they're efficient.
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Direct access
You talk to the developers doing the work.
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One point of contact
A technical lead owns your project.
Testing
How we know it works before you do
Development is not finished when the feature exists. It is finished when it behaves the same way for every customer, on every device, and the only way to know that is to check.
- 01
Cross-device and cross-browser
Your customers arrive on hundreds of device and browser combinations. We test across the ones that actually appear in your analytics rather than the ones that are convenient.
- 02
Built on a duplicate theme
Nothing is developed on your live store. You review on a preview link and approve before anything is published.
- 03
Documented on handover
What was changed, where, and why, so the next developer, ours or yours, is not reverse engineering it.
Rescue work
Inherited a store that nobody can work on?
It is one of the most common reasons brands arrive here. A developer left, an agency stopped replying, or a series of small changes has left a theme nobody wants to touch.
We will look at it and tell you honestly which it is. Sometimes the honest answer is that repairing inherited code costs more than replacing it, and we would rather say that at the start than bill you to find out.
Process
How it runs
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Step 01
Scope
You describe the problem; we assess feasibility and quote.
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Step 02
Build
Developed on a duplicate theme or staging environment, never on your live store.
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Step 03
Review
You approve everything on a preview link.
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Step 04
Ship
Published, monitored and documented.
Definition
What is a Shopify developer?
A Shopify developer builds and modifies the code behind a Shopify store: themes written in Liquid, custom features, apps, and integrations with other systems. It is a different job from a general web developer, because Shopify has its own templating language, its own architecture and its own constraints, and knowing those is most of the skill.
In practice a merchant hires developers for three reasons:
- The theme cannot do something they need.
- Something has broken and nobody in house can fix it.
- The store has to connect to a system it was never designed to talk to.
MM AI System
Want to build with AI?
New sections and features built by AI, checked against our rules and reviewed by a senior.
FAQs
Builds and modifies the code behind a Shopify store: themes, custom features, apps and integrations.
We scope per project rather than by the hour, so you know the cost before we start. There is no minimum, and small fixes stay small, we would rather do one job well and earn the next one.
No. From one fix upwards.
Yes, including undocumented or messy code. If building on it would cost more than replacing it, we'll say so.
Both.
Yes, and it is the most common thing we do. New sections, changed product page behaviour, design refinements. There is no minimum, so a single small change is fine.
We build changes to be maintainable and we document them. Major theme version updates can require rework, and we will flag that in advance.
Yes. A theme swap moves your content and settings to a new premium theme without touching code, which is the right call when the theme itself is the problem rather than the details.
Yes. Private and custom apps for storefront and internal use.
Yes, when the case is genuinely there. We'll tell you honestly if it isn't.
Barcelona base, London roots. We work with brands across the UK, Europe and Latin America.