Your Online Store,Built to Convert, Not Just LaunchShopify & Headless Commerce. In-House UK Engineers.
No default theme pretending to be custom. No checkout losing customers at the last step. We write a fixed-price Technical Specification before a line of code is touched — you approve it, we build exactly to it, and you own everything on delivery.
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E-Commerce Website Development Services We Deliver
From focused Shopify builds to fully headless commerce platforms — every project is scoped, specified, and delivered by our in-house team of 150+ UK-based engineers.
Custom E-Commerce Storefront Development
Bespoke storefronts built around your catalogue, not a generic theme.
- Hand-built storefront UI
- Custom product page templates
- Brand-accurate design system
- Mobile-first responsive layout
Shopify & Shopify Plus Development
Shopify builds and custom app development for growing retailers.
- Custom Shopify theme development
- Shopify Plus scripts & checkout extensions
- Third-party app integrations
- Liquid & Shopify Hydrogen builds
Headless Commerce (Next.js Commerce)
Decoupled commerce for maximum speed and design freedom.
- Next.js Commerce architecture
- Headless CMS + commerce backend
- Sub-2-second page loads
- API-first product data
Payment Gateway Integration
The checkout options your customers already trust.
- Stripe, Shopify Payments, PayPal
- Apple Pay & Google Pay
- PCI DSS compliant tokenisation
- Fraud prevention rules
Inventory & Order Management
Real-time stock sync across every sales channel.
- Multi-warehouse inventory sync
- Order fulfilment automation
- Low-stock alerts
- ERP & 3PL integrations
Product Catalogue & Search
Fast, relevant search that turns browsers into buyers.
- Faceted filtering & search
- Algolia / Elasticsearch integration
- Product variant management
- Bulk catalogue import tools
Checkout Conversion Optimisation
Fewer steps, fewer drop-offs, more completed orders.
- Checkout friction audits
- One-page & express checkout
- Abandoned cart recovery flows
- A/B-tested UX improvements
Multi-Currency & International Selling
Sell across borders without a second codebase.
- Multi-currency pricing
- Localised checkout experiences
- Region-specific tax/duty calculation
- Multi-language storefronts
E-Commerce Migration & Replatforming
Move platforms without losing SEO rankings or data.
- Magento/WooCommerce to Shopify migration
- Zero-downtime cutover planning
- SEO-safe URL redirect mapping
- Full product & order data migration
Why UK Retailers Choose Mtoag for E-Commerce
Three things that separate us from every other e-commerce agency in the UK.
Fixed-Price. No Surprises.
A fixed-price Technical Specification lists every page, integration, and milestone before you pay a penny. The price you sign is the price you pay.
150+ In-House Engineers.
100% of the engineering work is done by direct employees, never subcontractors, never offshore handoffs.
Full IP Ownership.
Theme code, integrations, and configuration transfer to you on final payment. No vendor lock-in.
E-Commerce Technology Stack
Every platform and integration below is one we ship for real UK retailers, not just list on a page.
All versions current as of July 2026.
E-Commerce Case Studies
All stores live in production since launch.
Our E-Commerce Development Process
The same six-step process on every project. No improvising. No scope creep.
Discovery & Catalogue Scoping
A discovery call and written Technical Specification covering catalogue size, integrations, and payment providers, signed before development starts.
UX Design & Checkout Flow
High-fidelity prototypes of every template — product, collection, cart, checkout — reviewed before development begins.
Agile Build in Two-Week Sprints
A live staging store accessible 24/7, weekly demos, and a dedicated Slack channel with your project manager.
QA & Payment Sandbox Testing
Full checkout testing across payment methods, devices, and browsers, plus a Lighthouse performance audit.
Launch & Go-Live Support
Zero-downtime cutover with DNS and analytics verified on launch day. Core Web Vitals monitored for 30 days post-launch.
Support & Seasonal Scaling
Ongoing maintenance, security patching, and seasonal traffic-scaling support available on a monthly retainer.
All timelines are fixed in the Technical Specification.
Start Your Project — Get Free AuditExplore Related Commerce & On-Demand Solutions
Specific build variants for specific business models.
E-Commerce Development —
Questions Answered
10 direct answers. No sales language.
E-commerce website development in the UK typically costs £8,000–£25,000 for a Shopify or WooCommerce build, and £25,000–£70,000+ for a custom headless commerce platform. Mtoag provides a fixed quote after a free scoping call, with no hourly guesswork.
Shopify suits most retailers needing a fast, reliable launch with lower ongoing maintenance. A custom headless build (Next.js Commerce) suits businesses needing unique checkout logic, complex catalogues, or performance beyond what Shopify’s theme layer allows. Mtoag recommends a platform after understanding your catalogue and growth plans.
Yes. Mtoag migrates stores from Magento, WooCommerce, BigCommerce, and legacy platforms to Shopify or a custom headless build, with a full product, customer, and order data migration plan and SEO-safe URL redirects.
A Shopify storefront typically launches in 6–10 weeks. A custom headless commerce build takes 10–16 weeks depending on catalogue size and integration count. Every project receives a fixed timeline in the Technical Specification before development begins.
Yes. Every Mtoag e-commerce build uses PCI DSS compliant payment processors (Stripe, Shopify Payments, Braintree) with tokenised card data — card details never touch our servers directly.
Yes. Mtoag’s conversion optimisation work covers checkout friction audits, page speed fixes, and A/B-tested UX changes. Clients typically see 15–35% conversion uplifts within 90 days of a checkout rebuild.
Yes. Mtoag builds multi-currency pricing, localised checkout experiences, and region-specific tax/duty calculation for stores selling across the UK, EU, and international markets.
All product, customer, and order history is mapped and migrated with validation checks at every stage, with a staging environment to review before going live — no data loss, no surprise gaps.
Yes, 100%. Custom theme code, integrations, and configuration created for your project belong to you from day one, written into every Mtoag contract as standard.
Every launch includes 30 days of performance and uptime monitoring at no extra cost. Ongoing maintenance, security patching, and seasonal campaign support are available on a monthly retainer.
Still have questions? Call our team: +44 (115) 888-0557
Serving E-Commerce Clients Across the UK
UK project managers available for on-site visits. Remote delivery available worldwide.
Let's Build Your Online Store.
Free Audit. No Commitment.
Tell us what you're selling. We'll send a free Technical Specification within 5 business days — with fixed scope and fixed cost.