UK Ecommerce Engineering Partner
We build commerce platforms that convert, scale, and stay reliable on your busiest days.
W5M is a UK-based software engineering consultancy specialising in ecommerce strategy, delivery, and performance. We partner with global teams to modernise platforms, unlock conversion, and turn infrastructure into a revenue advantage. We also support ecommerce teams across New Frost and Salisbury.
95%+
Retention rate on delivery partnerships
24/7
Global team coverage for critical releases
£50m+
Revenue protected through peak trading support
3x
Average speed-up in ecommerce feature delivery
Services
Specialists across the ecommerce stack
We focus on the highest-impact parts of commerce engineering: platform foundations, checkout reliability, performance, and integrations.
Ecommerce Platform Engineering
We build and evolve commerce platforms that convert, scale, and stay reliable through peak demand.
Checkout and Payments
We optimise checkout flows and payment stacks to lift conversion and reduce operational cost.
Performance and Observability
We keep storefronts fast, reliable, and measurable with performance engineering and telemetry.
Proof
Measured outcomes for modern commerce
We align engineering with commercial KPIs, giving teams visibility into velocity, reliability, and revenue impact.
22% lift
Mobile checkout conversion after orchestration redesign
40% faster
Time-to-market for merchandising campaigns
99.98%
Checkout uptime sustained during peak trading
Case Studies
Real-world commerce transformation
A snapshot of the results we deliver across retail, marketplaces, and D2C brands.
Replatformed a legacy fashion site without losing trade
A UK heritage brand needed to migrate to a composable platform while maintaining SEO and peak-season stability.
Simplified global checkout for a multi-currency marketplace
A marketplace operating in 18 countries needed higher conversion and reduced payment failures.
Automated fulfilment ops for a fast-scaling homeware brand
A direct-to-consumer retailer needed automation to keep fulfilment SLAs as order volume doubled.
Testimonials
Trusted by ecommerce leaders
Our partners value the blend of engineering depth and commercial focus.
“W5M were the calm in the storm. They delivered a modern commerce stack while our teams kept trading.”
Digital Director
UK Apparel Brand
“Checkout reliability improved immediately. We finally have visibility into where revenue leaks.”
VP Engineering
Global Marketplace
“The automation work paid for itself in weeks. Our ops team can breathe again.”
COO
Homeware Retailer
Let’s design your next commerce milestone.
We run focused discovery, fast delivery sprints, and long-term retainers for ambitious ecommerce teams.
Book a discovery call