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Custom software for e-commerce

We build bespoke systems for e-commerce organisations: order, stock and fulfilment systems, marketplace integrations and custom storefront features. Each one is shaped around how your team works and connected to the software you already rely on.

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Systems we build

Typical e-commerce projects. Each is scoped to your process, not a template.

  • Headless Commerce Platform

    js storefront, headless CMS for content, and a custom or open-source commerce engine for product catalogue, pricing, and order management. Delivers sub-second page loads and unlimited design flexibility.

  • Multi-Marketplace Integration Hub

    A centralised platform that manages product listings, pricing, inventory, and orders across Amazon, eBay, own website, and social commerce channels from a single interface. Automates repricing, stock synchronisation, and order routing to fulfilment centres.

  • Subscription Commerce Platform

    A purpose-built subscription management system for recurring product or digital service businesses with flexible billing, customer self-service portal, churn prediction, automated dunning, and detailed subscription analytics dashboards.

  • AI-Powered Product Recommendation Engine

    A personalisation system that analyses browsing behaviour, purchase history, and customer segments to serve individually tailored product recommendations across homepage, product pages, cart, and email.

  • Conversion Rate Optimisation Analytics Platform

    A custom analytics system that tracks the complete customer journey from landing page through checkout, identifies friction points and drop-off stages, enables A/B testing of page elements, and quantifies the revenue impact of each optimisation.

Problems we hear about

The issues that usually prompt the first conversation.
  • Platform-dependent e-commerce businesses on Shopify, WooCommerce, or Magento face performance limitations, customisation constraints, and escalating app subscription costs as they scale beyond platform capabilities
  • Cart abandonment is a persistent source of lost revenue in UK e-commerce, and requires sophisticated checkout optimisation, retargeting, and personalisation strategies
  • Cross-border commerce post-Brexit requires complex VAT handling including UK VAT, EU import VAT, customs declarations, and country-specific consumer protection compliance that standard platforms handle poorly
  • The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 impose specific pre-contract information requirements and 14-day cancellation rights that must be correctly implemented in checkout flows
  • Multi-channel selling across own website, Amazon, eBay, and social commerce creates inventory synchronisation challenges that lead to overselling, stockouts, and negative customer experiences

Off-the-shelf or custom?

There are good off-the-shelf products for most of e-commerce. If one fits your process, use it; we will tell you if we think so. Custom software makes sense when your process is distinctive, when you are joining several tools together by hand, or when a product forces your team into workarounds every day.

Rules we design around

Legislation and standards that commonly shape systems in this sector. We design with them in mind; your compliance advisers have the final word.
  • Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013
  • Consumer Rights Act 2015
  • Electronic Commerce (EC Directive) Regulations 2002
  • PCI DSS for payment processing
  • Strong Customer Authentication (SCA) under PSR 2017
  • UK GDPR and PECR for customer data and marketing
  • VAT Act 1994 for UK and cross-border VAT
  • Packaging Waste Regulations for e-commerce packaging

Relevant services

Common questions

Should we build a custom e-commerce platform or use Shopify?
Custom or headless builds become worthwhile when you need unique checkout flows, complex pricing logic, high-volume performance, or integrations that platform apps cannot provide. Elsio helps evaluate this decision during the discovery phase.
How does Elsio handle UK e-commerce compliance?
Elsio implements all requirements of the Consumer Contracts Regulations 2013 including pre-contract information display, 14-day cancellation rights, refund processing timescales, and digital content acknowledgements. Systems also comply with the Consumer Rights Act 2015, PECR for marketing, and UK GDPR.
Can Elsio handle post-Brexit cross-border commerce?
Yes. Elsio builds cross-border commerce systems that handle UK VAT registration and collection, EU import VAT via IOSS or the destination country mechanism, customs HS code classification, commercial invoice generation, and country-specific consumer protection compliance.
How does Elsio improve conversion rates?
Elsio implements performance optimisation for sub-second page loads, streamlined checkout flows with minimal steps, guest checkout options, multiple payment methods including Apple Pay and Google Pay, trust signals, and AI-powered personalisation.

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Tell us about your e-commerce project

Send a short brief and we will come back with questions, a rough approach and whether we are the right fit. No sales sequence.

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Prefer email? info@elslabs.co.uk

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