Ecommerce Web Agency

Responsive Web Design: The powerful approach to designing and building eCommerce websites

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Cyber-Duck is a leading responsive web design agency, offering technical and creative expertise to clients like Cancer Research, the EU and Arsenal FC. Our websites scale seamlessly across devices: resizing structure and content automatically.

When half of all website traffic now comes from mobile devices it's important to capture your customers across contexts. As one of the UK’s leading eCommerce web development agencies, we create exceptional products and experiences under a cross-channel mindset.

Our user-friendly eCommerce solution we developed for DLC achieved impressive performance metrics. With a 75.2% increase in the amount of online transactions, there has been a 66% increase in revenue generated in the first seven months. This even rose to a 122.5% increase, when revenue peaked in a busy period between January and March 2014. Here, transactions rose by 150.7%, and revenue by 133.2% on mobile.

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Work with a renowned responsive design agency

We will help you launch a fully responsive website, whether you need a fresh, unique design or retrofit for an existing site. Our responsive web design agency has experience in developing bespoke, striking websites in as little as five weeks. We have won some of the most sought-after industry awards for client work, including Webby, Wirehive 100 and UX UK. 

Our responsive website design for GSK increased their conversions by 79%. Following launch, visitors from mobile and tablet devices increased significantly: taking almost a 50% share of total traffic. Overall, this demonstrates the crucial role of responsive website design.

Our responsive websites benefit from an ISO accredited user-centred design process, blended with lean and agile management principles. As a responsive web agency, we can design for the desires of your specific audience. Our experts tailor experiences across devices with mobile-first production: from content strategy and interaction design, right through to build. By focusing on great user experiences from small screen to big, we can increase conversion rates and ensure return on investment (ROI) for clients.

Our mobile strategy and responsive design for GSK’s MaxiNutrition increased mobile conversions by 79%.


Accelerated Mobile Pages (AMP) are one of the latest changes made by Google. This movement is telling the online community that content is still king, but performance is more important than ever before. Search engines already prioritise content that uses the technology, over content that doesn’t. At Cyber-Duck, we understand the restrictions. We can design within them to deliver a product that complies with AMP regulations and guidelines – whilst maintaining a high level of usability and great user experience.

High performance technologies

Performance is critical on mobile. Website speed and size has a significant impact on abandonment and conversion rates: over half of smartphone users expect websites to load in under four seconds. 

Since 2005, our development experts have created fast, flexible websites that perform consistently across devices. Specialising in the latest HTML5 and CSS3 technologies, the team is well versed in popular responsive frameworks. We’ve even developed Hoisin: our own lightweight, customisable framework, which underpins our best responsive projects. 


Our responsive web design agency can fuel the growth of your business, working as an extension of your team. We would love to hear your ideas!