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Software Engineering

E-commerce Development

Most merchants should not build a bespoke store. We will tell you when off-the-shelf is the better answer — and build the custom platform only when your catalogue or checkout genuinely demands it.

Overview

An online store is deceptively simple to describe and unforgiving to get wrong. Every extra second in the checkout costs conversions, every payment edge case costs an order, and every over-engineered platform costs a monthly operations burden the business never asked for. We build commerce that respects all three: fast where it earns money, correct where money changes hands, and no more complicated than the catalogue actually requires.

The first decision — and the one that determines most of the cost — is the platform. Shopify gets you selling quickly with almost no operational overhead. Adobe Commerce (Magento) earns its complexity when you have a large catalogue, B2B pricing rules or multi-store requirements. WooCommerce fits a content-led business already living on WordPress. A bespoke or headless build is the right answer far less often than merchants assume. We make that call against your size, catalogue and roadmap, not against what is fashionable or what would bill the most hours.

Whatever the platform, the engineering that decides whether a store makes money sits in a few places: a catalogue and inventory model that stays truthful under load, a checkout that is quick and never mishandles a card, integrations to payment, tax, shipping and fulfilment that hold up on your busiest day, and the security to survive both fraud and a compliance review. That is the work we do, and we operate it after launch rather than handing over a store and walking away.

Who it’s for — Merchants launching, replatforming or scaling an online store who want an honest platform decision and a checkout that is fast, correct and PCI-safe — not the most expensive build on offer.

What you get

  • A platform recommendation argued from your catalogue size, margins and roadmap — including the case for not building bespoke when off-the-shelf wins
  • Catalogue, variant and inventory modelling that stays accurate across channels and does not oversell
  • Checkout and payment integration via hosted flows (Stripe, PayPal, Apple Pay, Google Pay) so raw card data never touches your servers
  • Tax and shipping calculation wired to real providers, plus order management and fulfilment integrations
  • A storefront tuned for Core Web Vitals — because checkout speed and page speed are conversion levers, not vanity metrics
  • Fraud controls, PCI-aligned configuration and the monitoring to spot a problem before your customers report it
  • A migration plan when replatforming — catalogue, customers, orders, URLs and SEO carried across without a traffic cliff

What E-commerce Development does for you

  • Revenue you do not leak

    A fast, well-structured checkout recovers the orders a slow or clumsy one quietly loses. Performance and conversion are the same conversation.

  • The right platform, not the biggest

    We save you from paying for bespoke complexity you do not need — and from outgrowing a platform that cannot handle your catalogue. The honest call up front is worth more than any feature.

  • Payments that pass a review

    Hosted payment flows keep card data off your infrastructure, which shrinks your PCI scope and your liability. You take payments without becoming a payments company.

Why teams choose us for E-commerce Development

  • We will talk you out of a bespoke build when Shopify or an off-the-shelf platform would be cheaper and better — most merchants hear that from us, not a sales pitch for the opposite.
  • Senior engineers who have run stores through peak trading, not juniors learning payments on your revenue.
  • We operate what we build, so checkout reliability, fraud and uptime are our problem after launch, not just yours.
  • Payment and PCI decisions made the safe way by default — hosted flows, tokenisation, minimal scope — rather than the way that looks convenient and fails an audit.

What E-commerce Development includes

The concrete pieces of work this covers — scoped to what your problem actually needs.

  • Platform selection and setup

    Shopify and Shopify Plus, Adobe Commerce (Magento), WooCommerce, or a bespoke build. We match the platform to your catalogue, margins and operational appetite — and say so plainly.

  • Catalogue and inventory

    Product, variant, bundle and pricing models that stay coherent, plus inventory that reconciles across storefront, warehouse and marketplaces so you do not oversell.

  • Checkout and payments

    Hosted and tokenised payment integration with Stripe, PayPal, Adyen and the wallets, built so raw card data never lands on your systems and PCI scope stays small.

  • Tax, shipping and fulfilment

    Real-time tax and shipping rates, carrier and 3PL integrations, and order management wired to how you actually pick, pack and ship.

  • Headless commerce

    A custom storefront on a commerce backend (Shopify Hydrogen, a headless Magento, or commercetools) when the brand front end genuinely justifies decoupling it. We flag when it does not.

  • Performance and conversion

    Core Web Vitals work, image and asset discipline, and a checkout stripped of the friction and third-party weight that quietly costs orders.

Where it fits

  • A first serious store

    A growing brand outgrowing a marketplace or a hobby setup, needing a real store fast. Usually Shopify — we get it live, integrated and converting without over-building.

  • Replatforming off a store that has aged out

    A merchant on a platform that no longer fits — end-of-life Magento 1, a tangle of plugins, or a hosted plan they have outgrown. We migrate catalogue, customers, orders and SEO across without dropping traffic.

  • A complex or B2B catalogue

    Thousands of SKUs, customer-specific pricing, contract terms or multi-store operations — the case where Adobe Commerce or a bespoke build earns its complexity rather than adding it for its own sake.

  • A custom brand front end on a proven backend

    A distinctive storefront experience that a themed platform cannot deliver, run headless over a commerce engine that still handles payments, tax and orders for you.

How we approach E-commerce Development

We start with the platform decision because it dictates almost everything downstream, and we make it in your interest rather than ours. If Shopify will serve you for the next three years at a fraction of the cost of a custom build, that is the recommendation you get — even though it is the smaller engagement. A bespoke or headless commerce platform is justified when catalogue complexity, integration depth or a differentiated storefront genuinely require it, and rarely before. Getting this wrong in either direction is expensive: over-build and you carry operational weight forever; under-build and you hit a ceiling mid-growth.

From there we treat checkout as the part of the store where correctness and speed both matter most, because it is where money moves and where hesitation loses sales. Payments go through hosted, tokenised flows so card data never touches your infrastructure; performance is budgeted rather than hoped for; and inventory, tax and fulfilment integrations are built to hold up on your busiest trading day, not just in a demo.

How we deliver an e-commerce build

We begin with a short, honest platform assessment. We look at your catalogue size and structure, your margins, your integration needs and your appetite for operating software, then recommend the platform that fits — frequently Shopify, sometimes Adobe Commerce or WooCommerce, occasionally a bespoke or headless build. The recommendation comes with the trade-offs written down, including what you give up by choosing it, so the decision is yours and informed rather than sold.

With the platform settled, we model the catalogue and inventory first, because a store built on a shaky product model fights itself forever. Then we build outward: storefront and merchandising, the checkout and payment integration, and the tax, shipping and fulfilment connections that turn a completed order into a shipped one. Each piece is built against real data and real provider sandboxes, not mocked and hoped for.

Before launch we test the paths that actually cost money when they break — payment success and failure, declined cards, partial stock, tax edge cases, and the store under the kind of load a promotion brings. We launch deliberately, watch the funnel and the errors closely in the first days, and stay on to operate the store rather than treating go-live as the finish line.

Architecture and platform choice

The architecture follows the platform, and the platform follows your catalogue. On Shopify or Shopify Plus, the architecture is mostly integration and merchandising: you inherit a hardened, PCI-compliant checkout and a scalable backend, and the engineering goes into theme performance, apps and the connections to your other systems. This is the right shape for the majority of merchants, and we are not shy about saying so — it is cheaper to run and harder to break than anything we would build from scratch.

Adobe Commerce and self-hosted platforms give you control over a complex catalogue, B2B pricing and multi-store setups, at the cost of real operational responsibility — hosting, patching, performance tuning and security become yours. We take that on knowingly, for merchants whose complexity genuinely needs it. A headless architecture decouples a custom storefront from the commerce backend; it buys front-end freedom and pays for it in moving parts, so we recommend it only when a themed platform truly cannot deliver the experience the brand needs.

Whatever the shape, the storefront is architected for speed, because on a store speed is revenue. That means keeping third-party scripts on a tight leash, serving images at the right size and format, caching aggressively where the catalogue allows, and keeping the checkout path as light as it can be. Performance is a budget we set and defend, not a metric we check once and forget.

Payments, PCI and fraud

The single most important security decision in a store is to never handle raw card data. We integrate payments through hosted fields and tokenised flows — Stripe, PayPal, Adyen and the wallets — so the card number is captured by the payment provider, not by your servers. This keeps the sensitive data off your infrastructure entirely and collapses your PCI DSS scope to the simplest self-assessment tier rather than the full, expensive obligation that handling card data directly would impose. It is the difference between taking payments and becoming a payments company, and we always choose the former.

On top of that we configure the store to a defensible baseline: enforced HTTPS, secrets kept out of code and configuration, least-privilege access to the admin and the order data, dependency and plugin scanning, and audit logging on anything that touches money or customer records. On platforms where you own the hosting, patching and hardening are part of the engagement rather than an afterthought — an unpatched commerce platform is one of the most reliably attacked things on the internet.

Fraud is the other half of payment security, and it is a tuning problem, not a switch. We wire in the fraud tooling the payment providers offer — risk scoring, address and card verification, velocity and 3-D Secure — and calibrate it to your risk profile, because thresholds set too tight reject good customers and set too loose invite chargebacks. We watch chargeback and dispute rates after launch and adjust, treating fraud control as something operated over time rather than configured once.

Signs it’s time

  • Your checkout is slow or clunky and you can see the drop-off in the funnel but cannot explain the cause
  • You are on a platform that has aged out — end-of-life software, a plugin sprawl nobody fully understands, or a plan you have outgrown
  • Inventory does not reconcile across your storefront, warehouse and marketplaces, so you oversell or hold stock you cannot sell
  • You are handling payment data in a way that would not survive a PCI or security review

How we work

We work in short, reviewable cycles against a store you can click through, so you are steering off the real thing rather than a specification. The catalogue and checkout come early, because they are where the risk and the revenue concentrate, and everything is built against real payment sandboxes and real inventory data so the awkward cases surface in development rather than on your busiest day.

Nothing about payments is guessed. Every payment path — success, decline, timeout, partial refund, abandoned cart — is exercised before launch, and the store is load-tested against the traffic a promotion or a peak season actually brings. We would rather find the failure in a sandbox than in the checkout funnel with customers watching.

Because we operate what we build, the store ships with the monitoring, alerting and runbooks needed to run it — not a handover document and a wave goodbye. When something goes wrong at 2am on a sale day, the people who built the checkout are the people who understand it.

Technologies we build it with

Chosen per problem, not per fashion — this is the stack we most often reach for on this work.

How we deliver

  1. 01

    Discover

    We map the system, the constraints and the business it serves — including the parts nobody documented.

    Architecture brief

  2. 02

    Architect

    Decisions get made, written down and defended before a line of production code exists.

    Decision records

  3. 03

    Build

    Short cycles against working software. You see progress in the product, not in a status deck.

    Shipping increments

  4. 04

    Operate

    Monitoring, incident response and iteration. The system is alive, so the engagement is too.

    Runbooks & SLOs

What changes

  • A checkout that converts

    Fast, low-friction and correct where money changes hands — the orders a poor checkout was quietly losing, recovered.

  • The right-sized platform

    A store matched to your catalogue and roadmap — neither over-built and expensive to run, nor under-built and about to hit a ceiling.

  • Payments off your books

    Card data kept off your infrastructure through hosted flows, so PCI scope and liability stay small and a review is not a scramble.

Industries we serve

Domain knowledge changes what gets built. A few of the sectors we know before the first meeting.

How pricing works

  • The platform choice is the biggest cost driver by a wide margin. A well-executed Shopify build is a fraction of the cost of a bespoke or headless platform, and for most merchants it is also the better outcome — which is why our honest recommendation frequently lands on the cheaper engagement.
  • Catalogue and integration complexity move the number next: a few dozen simple products with one payment method is a different piece of work from thousands of SKUs, B2B pricing rules, marketplace sync and a warehouse integration. We scope against your actual catalogue and systems, not a generic tier.
  • Migrations carry their own cost, driven by the state of the data you are moving and how much of the old store’s SEO and URL structure has to be preserved. A clean catalogue migrates cheaply; a decade of inconsistent product data and hand-edited URLs does not.
  • Ongoing operation — hosting on self-managed platforms, performance and fraud tuning, and support through peak trading — is priced separately and honestly, because a store is a running business rather than a project that finishes at launch.

Typical timeline

  1. 01

    Platform decision and scope (1–2 weeks)

    We assess your catalogue, margins and integration needs, recommend the platform with the trade-offs written down, and scope the build against your real systems rather than a template.

  2. 02

    Catalogue and storefront (2–5 weeks)

    Product, variant and inventory modelling, then the storefront and merchandising, built against real data and reviewed in short cycles you can click through.

  3. 03

    Checkout, payments and integrations (2–4 weeks)

    Hosted payment integration, tax and shipping rates, and order management and fulfilment connections — all exercised against real provider sandboxes and every payment path tested.

  4. 04

    Hardening, launch and operation (1–2 weeks, then ongoing)

    Load and fraud testing, PCI-aligned configuration, a watched launch, and the monitoring and runbooks to operate the store through peak trading.

Why teams choose us for E-commerce Development

  • We say when not to build

    Most merchants should not commission a bespoke store, and we tell them so. The honest platform call — often Shopify over something we would bill more for — is the most valuable thing we bring.

  • We run stores under load

    Senior engineers who have taken checkouts through peak trading and know where they break, rather than juniors learning payments on your revenue.

  • Payments done the safe way

    Hosted, tokenised flows that keep card data off your servers and PCI scope small by default — not the convenient shortcut that fails a review.

  • We operate what we build

    Checkout uptime, fraud and performance stay our concern after launch. When it matters most, the people who built the store are the ones keeping it running.

How to engage us

Three ways to work with us on this — chosen to fit the problem, not our margin.

Related services

Part of Custom Software Development. Other work we do alongside this.

Common questions

Should we build a bespoke store or use Shopify?

Almost certainly Shopify or another off-the-shelf platform, unless your catalogue or customisation needs genuinely justify custom. Bespoke commerce is expensive to build and to operate, and it makes you responsible for the hardened, PCI-compliant checkout that Shopify gives you for free. A custom or headless build earns its cost when you have a large or unusual catalogue, complex B2B pricing, deep integration needs or a storefront experience a themed platform cannot deliver — and rarely before. We will make that call against your situation and tell you plainly, even when the honest answer is the smaller engagement.

How do you handle payment security and PCI compliance?

By never letting raw card data touch your servers. We integrate payments through hosted fields and tokenised flows from providers like Stripe, PayPal and Adyen, so the card number is captured by the provider and your systems only ever see a token. This keeps the sensitive data off your infrastructure and collapses your PCI DSS obligation to the simplest self-assessment tier instead of the full, costly one that handling cards directly would trigger. On top of that we configure HTTPS, least-privilege admin access, secret management and audit logging as defaults.

Can you migrate us from our current platform without losing SEO or traffic?

Yes, and preserving SEO is a deliberate part of the migration rather than an afterthought. We carry across your catalogue, customers and order history, and we map old URLs to new ones with proper redirects so search rankings and inbound links survive the move. We keep the site structure and metadata coherent through the transition and watch traffic and crawl behaviour closely in the weeks after launch. The cost and effort depend heavily on the state of your existing data — a clean catalogue migrates smoothly; years of inconsistent product data and hand-edited URLs take more care.

Why does checkout speed matter so much?

Because it converts directly into revenue. Every additional second of load time and every extra step in the checkout increases the number of shoppers who abandon before paying, and on a store that abandonment is money you can measure. Page speed affects how many people reach the checkout, and checkout speed and friction affect how many of them complete it. We treat performance as a budget we set and defend — keeping third-party scripts controlled, images disciplined and the checkout path light — rather than a metric we glance at once and forget.

What is headless commerce, and do we need it?

Headless commerce means running a custom storefront front end that is decoupled from the commerce backend handling payments, catalogue and orders — for example a bespoke front end over Shopify Hydrogen or a headless Adobe Commerce. It buys you full control over the storefront experience and pays for it in extra moving parts and operational complexity. Most merchants do not need it: a well-built themed store is faster to deliver and cheaper to run. It is the right choice when the brand experience genuinely cannot be achieved on a themed platform, and we will tell you honestly whether yours is one of those cases.

Let’s talk about E-commerce Development.

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