Web Design in Cumbria

Aim higher.

Innovative web solutions to boost your business.

Zen Cart Development

If you're looking for a Zen Cart developer, you're in the right place! We have over 10 years of experience of working with this brilliant and scalable open source eCommerce platform.

Web Development

We love using web technologies to solve your business problems and achieve your commercial goals. From your own in-house systems to third party API integrations - we do it all. Find out more about our Web Development services here.

WordPress Development

Custom plugin and theme development to meet your requirements, all carried out in line with WordPress standards and best practices to ensure ongoing compatibility.


We’re Rocket Sites – a web design and development company based in Carlisle, Cumbria – and we’re passionate about helping businesses of all sizes make the most of the internet.

We love the fact that – in many ways – the Internet provides a level playing field for businesses of all sizes and types. We strive to provide our customers with the technology, tools and understanding to achieve all of their online objectives, regardless of their experience, business size or ambitions.

Our aim is to empower our customers with web solutions that enable them to meet their business objectives in the most efficient and effective way.

Village Hall Website
API Developers
Proper Geeky Stuff!

Some of the API integrations that we've been working on...



Creation of shipments, production and printing of thermal labels and international invoices.


Submission of products from Zen Cart for inclusion in the Walmart (US) online marketplace.


Creation of a custom payment module for Zen Cart for the facilitation of recurring billing.

Rescura API


Availability, quantity and pricing updates of WooCommerce products from Rescura data.



Creation of shipments and thermal labels, as well as both paper and paperless international invoices.

Royal Mail API

Royal Mail

Automated registration of consignments, thermal label printing and returns system.

Brightpearl API


Stock synchronisation between BrightPearl and Zen Cart, as well as real-time order creation.

ePos Now

Inventory synchronisation and order creation with Zen Cart, plus advanced reporting.