CS-Cart Experts Development, support & bespoke from UK based specialists

More than ten years building, extending and rescuing CS-Cart stores and Multi-Vendor marketplaces for retailers, B2B brands and specialist marketplaces.

CS-Cart is our specialism, not a sideline.

We have worked with CS-Cart and CS-Cart Multi-Vendor for more than a decade. In that time we have built marketplaces with hundreds of thousands of products, B2B platforms for international fashion brands, custom vendor dashboards, SAP supply-chain integrations and a companion mobile app.

That depth means we know where the platform shines, where it needs extending and how to extend it cleanly. We build with add-ons and hooks rather than hacking core files, so your store stays upgradeable, and we understand the operational reality behind the storefront: catalogues, vendors, pricing, fulfilment and administration.

CS-Cart services.

From a single fix to a complete bespoke platform.

  • Add-on development

    Bespoke functionality built as clean, upgrade-safe add-ons. Add-ons

  • Theme design

    Distinctive, fast storefronts designed around how your customers shop. Themes

  • Integrations

    ERP, SAP, stock, accounting, marketplaces and feeds connected reliably. Integrations

  • Search

    Typesense-powered instant search and filtering for large catalogues. Search

  • Support and upgrades

    Fault-finding, version upgrades and ongoing maintenance. Support

  • Bespoke platforms

    Multi-Vendor marketplaces and B2B platforms built on CS-Cart. Bespoke

Deep platform knowledge, clean engineering.

Every customisation is built to live alongside CS-Cart updates. We use the platform’s hooks, add-on structure and templates properly, document what we change and test against the journeys your business depends on: registration, search, checkout, vendor management and administration.

If your store has years of customisations from different developers, we can untangle them and bring it back to a maintainable state.

  • Upgrade-safe add-ons, not core hacks
  • Staging and testing before every release
  • Clear documentation of every customisation
app/addons/trade_pricing/func.php
// Apply trade pricing without touching core filesfunction fn_trade_pricing_get_product_price_post(    $product_id, $amount, $auth, &$price) {    $tier = TradeTier::forUser($auth['user_id']);    if ($tier && $amount >= $tier->minimumQuantity()) {        $price = $tier->apply($price, $product_id);    }}

Marketplaces at serious scale.

Multi-Vendor marketplaces bring their own challenges: vendor onboarding, product matching, catalogue quality, commission rules and search across a huge, constantly changing catalogue.

We have solved these for real marketplaces, including Typesense search across hundreds of thousands of products, bespoke vendor dashboards and product-matching tools that keep listings clean.

  • Vendor dashboards and onboarding
  • Product matching and catalogue quality
  • Search that stays fast as you grow
Marketplace search
carp rod 12ft1,284 results
Length12ft10ftTest curve3–3.5lb5lb
  • Carp rod 12ft 3.5lbBankside Tackle
    £89.99
  • Carp rod 12ft 3lb, 2-pieceRiver & Reel
    £64.00
  • Spod rod 12ft 5lbLakeside Angling
    £72.50
  • Rod sleeve, 12ftBankside Tackle
    £24.99

Brands our ecommerce work has supported

  • Barbour
  • Superdry
  • Harley-Davidson
  • Mundi Westport Group
  • TackleTarts

Functionality we have built for CS-Cart.

A selection from more than a decade of CS-Cart and Multi-Vendor development. Every one was built for a real business requirement.

  • Typesense search

    External search for a multi-vendor catalogue of hundreds of thousands of products, with instant, typo-tolerant results.

  • Vendor dashboards

    A bespoke vendor interface in the marketplace’s own identity, keeping the Multi-Vendor functionality sellers rely on.

  • Product matching

    Tools for vendors to match new listings to existing catalogue records, keeping the marketplace clean.

  • 3D product media

    A 3D product viewer built into CS-Cart’s standard media handling, with admin tools to add models to products.

  • Recommendations

    Recommendation logic driven by previous purchases and the categories each customer has browsed.

  • Business-rule editor

    Promotions and actions triggered automatically as customers join or leave user groups.

  • Imports & exports

    Custom tools for moving selected records and calculated data in the formats each business system expects.

  • SAP supply chain

    Integrations connecting CS-Cart with SAP-based supply-chain processes for stock, orders and fulfilment.

  • Third-party sign-in

    Authentication with external identity providers for enterprise and B2B customer access.

  • Custom data objects

    New record types beyond the standard product model, including a video-game catalogue for a gaming marketplace.

  • Operational logging

    Extra event capture and indexing to investigate business-critical behaviour quickly.

  • Marketplace app

    A companion mobile application for a gaming exchange marketplace built on CS-Cart Multi-Vendor.

“Glenn worked with us building a very large and complex multi vendor marketplace on CS Cart. Would recommend him to all who need any CS Cart work as he is a highly knowledgable and skilled developer.”

David Oak · Business ownerRead our Google reviews

How we work together.

A clear, collaborative process with no surprises. You always know what is happening, what we need from you and what comes next.

  1. Step 1

    Review

    We review your CS-Cart version, theme, add-ons and customisations, and understand the business process behind the request.

  2. Step 2

    Scope

    A clear specification and fixed quote, with upgrade and compatibility implications explained up front.

  3. Step 3

    Build & test

    Developed as clean add-ons wherever possible, tested on staging against your critical journeys.

  4. Step 4

    Deploy & support

    A planned release with a route back, documentation and ongoing support if you need it.

Questions, answered.

Anything else you would like to know? Ask us directly and we will give you a straight answer.

Can you work on a heavily customised CS-Cart store?

Yes. Most of the stores we inherit have been customised by several developers. We review the code, add-ons and behaviour first, which makes dependencies and upgrade risks visible before we change anything.

Do you work with CS-Cart Multi-Vendor?

Yes, extensively. Our work includes multi-vendor marketplaces, custom vendor dashboards, product matching and marketplace search at scale.

Can you upgrade our CS-Cart version?

Yes. We assess your customisations and add-ons for compatibility, upgrade on staging, fix what breaks and plan a controlled release.

Can you take over a stalled CS-Cart project?

Yes. We assess the code, the remaining requirements and the deployment, then provide a practical plan to finish the project.

Are you based in the UK?

Yes. We are a UK-based CS-Cart specialist in Worthing, West Sussex, working with clients across the UK and internationally.

Let’s build something exceptional.

Tell us about the website, platform or problem you have in mind. We’ll reply within one working day with honest advice on the best next step.

Or email hello@glenndilen.co.uk