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Build & Migrate

Shopify Theme Development

Themes your team can edit.

100+Brands built and grown
2018On Shopify since
2Own brands we run
26Stores in the ledger

Custom Shopify theme development, built on current theme architecture so your team can actually run the store. Sections and blocks a merchandiser can rearrange without a developer, and without the page speed collapsing the first time somebody adds a row.

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ReceiptThe theme behind this site was built the same way: held to a Core Web Vitals budget set before the design started, with every section editable without a developer.

What you get

What our Shopify theme development service covers

Custom Shopify Theme Builds

A theme built for your catalogue and how you actually merchandise it, rather than a marketplace theme bent into shape. We start from Shopify's current architecture so the store inherits platform improvements instead of drifting further from them each year.

Shopify Theme Customisation

Already on a theme that mostly works? We extend it rather than replace it. New sections, new templates, and the customisations you have been quoted a rebuild for, delivered against the theme you already own.

Sections and Blocks Your Team Controls

The difference between a theme that ages well and one that does not is how much your team can change without asking. We build every section as a configurable block, so a campaign page is a merchandising job rather than a development ticket.

Performance Built In

Most custom themes are fast on launch day and slow six months later. We set a budget for scripts, images and third-party load before writing anything, then measure against it at every review, so speed is a constraint rather than a postmortem.

Accessible By Default

Keyboard-complete navigation, visible focus, sensible heading order and contrast that passes. This is not a compliance add-on we quote separately. It is how the theme gets built, because retrofitting it later costs considerably more.

Handover You Can Use

The theme ships in your own repository with the build documented and the section options explained in plain language. If you take the store elsewhere afterwards, nothing about it is designed to make that difficult.

How we work

How we build a custom Shopify theme

01 · Audit and Requirements

We look at the theme you have, what your team changes most often, and where the current build makes routine work expensive. That list usually shapes the architecture more than the design does.

02 · Architecture and Budget

Template structure, section library and a written performance budget agreed before any code. Deciding what a section can do is cheaper now than discovering its limits after launch.

03 · Build and Review

Built in your repository and reviewed as pull requests, on a development theme you can click through at any point. Tested on real devices rather than a desktop browser at a narrow width.

04 · Launch and Handover

Managed go-live, then a working session with the people who run the store day to day. A theme nobody knows how to operate is a theme that quietly reverts to needing us, which is not the outcome we want.

The point

What it changes

  • Built on current Shopify theme architecture, not a fork of something abandoned
  • Every section merchandiser-editable, so routine changes never need a developer
  • A performance budget set before we build, and held after launch
  • Yours outright, in your repository, with no licence and no lock-in

Next step

Want this looked at on your store?

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Partners

Tools we have already run on our own stores.

The apps around a Shopify store decide as much as the theme does, and choosing between thousands of them is most of the work. We are a Shopify Plus Partner and we integrate the tools that sit around the platform. Every one of them runs on our own two stores before it reaches a client, so the recommendation you get comes from having paid for the thing and lived with it. When a brand already runs a stack that works, we integrate with it rather than rebuilding it to suit us.

How we use them

In their words

The things [the team] have put in place and recommended for us have paid immediate dividend. We wish we had come in contact with [them] sooner.
ARTMARTIALStore build or redesignShopify Partner Directory, April 2026

Proof

Where we have done this

Questions

Straight answers

What's the difference between bespoke shopify theme development and shopify custom theme development?

Nothing meaningful; they're the same phrase in a different order. Shopify custom theme development means building on Online Store 2.0's section architecture from your brand, rather than a marketplace template, so every section is one your own team can edit.

Do you build custom shopify themes from scratch, or customise an existing one?

From scratch, against your brand. Custom shopify themes built this way avoid the constraints a marketplace theme was designed around, which is usually where a heavily customised template starts fighting the person trying to edit it.

What happens to our current theme customisations during development?

Nothing gets carried over blind. We audit what the current theme actually does, keep the parts that work, and rebuild the rest properly rather than porting workarounds into a new codebase.

Can our own team edit the theme after launch, or do we need you every time?

Your team, by default. The whole point of building on current section architecture is that adding a banner or reordering a homepage does not need a developer. We stay involved for anything that touches logic rather than layout.

Are you a Shopify theme development company, or a team of Shopify theme developers?

Both describe the same people. As a shopify theme development company we scope and quote the build, and the shopify theme developers who write the code are on the scoping call, so nothing is lost in a handover. If you are weighing a shopify theme development agency against a freelancer, the difference is cover and code review rather than skill.

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Tell us what the store needs to do.

UK and US brands buy this from the same senior team, and the American day is covered from the start of it rather than the end. How we work with US brands.

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