E-Commerce Development

E-Commerce Development Services for Stores Engineered to Sell

Most online stores lose sales at the same three points: a slow storefront, a clumsy checkout, and product pages that don't convince. A store built for conversion fixes all three — fast pages, a checkout with as little friction as legally possible, and the tracking to know exactly where money is leaking.

At Codified Studio, we build e-commerce stores — on Shopify or fully custom — engineered around the numbers that matter: speed, conversion rate, and average order value. Built by a real in-house team, owned entirely by you.

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Shopify or Custom? Choosing the Right Foundation

The first real decision in e-commerce is the platform. Shopify is the fastest, most reliable route for most stores — hosted, secure, and endlessly extensible. A fully custom store (or a headless build) makes sense when you have unusual product logic, huge catalogues, or need a bespoke experience Shopify's checkout can't give. We build both, so the recommendation you get is the one that fits your business — not the one we happen to prefer.

What We Build Into a Store

Speed that keeps carts full.

Every second of load time costs conversions. We build fast storefronts and speed-tune product pages — because a store that lags loses the sale before the “add to cart”.

Frictionless checkout.

Fewer steps, more payment options, and abandoned-cart recovery — the checkout is where money is won or lost, so it's where we spend the detail.

Products, inventory & orders.

Catalogue setup, variants, inventory sync, and order management that scales from a launch range to thousands of SKUs without breaking.

Conversion tracking built in.

GA4, pixels, and event tracking wired up from launch — so you're optimising on data, not guesses, from the first sale onward.

What's Included in an E-Commerce Build

A typical e-commerce engagement covers:

Platform recommendation — Shopify, headless, or fully custom
Conversion-focused storefront design and build
Product, variant, inventory, and order management setup
Payment integration — Stripe, PayPal, Apple/Google Pay
Cart recovery, email hooks, and analytics/conversion tracking
Speed optimisation, SEO foundations, and post-launch support

Selling on Shopify specifically? See our dedicated Shopify development service for theme, app, and Shopify Plus work.

Built for the Metric That Matters — Revenue

A beautiful store that converts at 0.8% is a worse store than a plain one converting at 2.5%. We build for the outcome: every design and engineering decision is measured against whether it helps someone buy, then verified with real conversion data after launch.

Shopify / Shopify Plus for speed-to-launch and reliability, or custom on Next.js
Optimised, SEO-ready product and category pages that actually rank
Payment, shipping, tax, and fulfilment integrations wired to your operation
Analytics and A/B-ready structure, so the store keeps improving after launch

Speed isn't a nice-to-have in e-commerce — it's revenue. A store that loads a second faster converts measurably better, which is why performance is engineered in from the first page, not patched on before launch.

Ideal For

Brands launching or relaunching a store
Retailers migrating from a slow or dated platform
Businesses moving from marketplaces to their own store
Stores stuck with a poor conversion rate

How We Deliver — From First Call to Launch (and After)

No black box. Here's exactly what happens once you bring us in:

01

Discovery & scoping

A real conversation about the problem, the users, and the constraints — not a sales call. We leave it knowing exactly what needs building and why.

02

Fixed proposal & quote

You get a plain-English scope document, a timeline, and a fixed price. What's included, what's excluded, and what happens if scope changes — all in writing before any money moves.

03

Design & architecture

Wireframes, UI, and the technical architecture — database schema, API design, hosting — agreed up front so there are no expensive surprises mid-build.

04

Build in sprints

Development happens in short, reviewable cycles with a shared board. You see working software early and often, not a single black-box handoff at the end.

05

QA & testing

Every feature is tested — automated tests plus manual QA on real devices — before it's marked done. Nothing ships on a “works on my machine”.

06

Launch & handoff

Deployment, performance checks, and a walkthrough. You get the source code, the hosting, and the documentation — full ownership, zero lock-in.

07

Support & iteration

We stay on for bug fixes, monitoring, and new features on a retainer or ad-hoc basis — whichever fits how your product will actually grow.

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How Much Does E-Commerce Development Cost?

E-commerce development cost in the UK depends on platform and complexity. For reference:

Typical price ranges for E-Commerce Development at Codified Studio, in US dollars
OptionTypical range
UK agency — Shopify store£8,000 – £40,000
UK agency — custom / headless build£30,000 – £120,000+
Freelance build (variable quality)£3,000 – £20,000
E-commerce store via Codified Studiofrom $1,800

The cheapest quote on paper isn't always the cheapest in practice — a low day rate that needs heavy management, or a build that needs redoing, costs more than a fixed scope delivered right the first time. With Codified Studio, pricing is transparent from the first quote: no hidden onboarding fees, no surprise scope creep, and full code ownership at the end. See the work we've delivered or tell us what you're building.

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FAQ

Frequently Asked Questions

Shopify for most stores — it's faster to launch, hosted, secure, and extensible enough for the vast majority of businesses. Go custom or headless when you have unusual product logic, a very large catalogue, or need a checkout experience Shopify can't give. We build both and recommend based on your business, not our preference.

Related Services

Would a dedicated developer suit you better?

A fixed-scope project works best when you know what you need built. If the work is ongoing, or you already have a team that just needs more capacity, embedding one of our developers full-time is usually the cheaper route.

Compare both options

Ready to start your e-commerce development project?

Tell us what you're building and we'll come back with a scoped recommendation and a fixed quote — not a generic sales call.

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