Shopify Plus
Agency 
ECS® is London's leading Shopify Plus agency delivering exceptional e-commerce solutions. As Shopify experts, we specialise in custom design, development and optimisation for ambitious UK brands.
Our proven track record of success and deep technical expertise makes us the trusted Shopify partner for businesses seeking growth.
WHY CHOOSE ECS®
Shopify Experts
As a leading Shopify Plus agency in London and across the UK, we bring together world-class designers, developers and strategists focused exclusively on Shopify excellence. Our team of Shopify experts delivers custom solutions that drive real business growth.
Looking to join London's top Shopify agency? We're Hiring
The ECS® Difference
What sets us apart as your Shopify development partner is our laser focus on e-commerce success. Whether you're looking to launch, migrate, or optimise your Shopify store, our proven expertise delivers measurable results through:
01
Technical Excellence
Expert Shopify Plus development and custom solutions tailored to your needs02
Strategic Growth
Data-driven optimisation to maximize your store's performance03
Creative Innovation
Award-winning design that converts visitors into customers04
Dedicated Support
Your trusted long-term Shopify partner for sustainable growth
SHOPIFY Plus Agency
Shopify Plus Agency Partner in London
As Shopify experts in London, we've spent years perfecting the art of e-commerce excellence. Our deep understanding of the platform enables us to deliver solutions that drive real business growth.
Whether you're looking for Shopify design, development, or optimisation services, our London-based team combines technical mastery with creative innovation to build high-performing online stores. From custom Shopify Plus development to ongoing support, we're the agency partner ambitious brands trust.
“Excellent experience with Karmoon, helping to build and maintain our site along with various custom apps. Especially good at comms and helping to solve and problems if and when they arise.”
“Its been amazing working with you, I can honestly say you are one of the best developers I've worked with.”
“The work that they produced was to a really high standard and I would absolutely recommend them.”
“Thank you for all your support during Black Friday, we have seen some amazing results!”
“Our main objectives were conversions, site speed and mobile UX. These priorities were executed. I would highly recommend to any brand looking to improve their Shopify Plus site.”
“The new site looks fantastic. Orders coming through and everything is running smoothly.”
“I can say with complete confidence that you are placed amongst those individuals who know that there is no finish line. You have done yourself proud, and you have excelled at your chosen craft.”
“A dream to work with, you completely understood the direction we wanted for our new website and delivered quickly and to the highest quality”
“Amazing! You guys will be doing all our future Shopify developments.”
“I was really blown away by the work that Karmoon did. Very high quality, with a real focus on flexibility... I would wholeheartedly recommend them.”
“After deploying and with the support of Algolia and partner Karmoon, the company saw the benefits 'straight away'”
“Karmoon, it is totally appreciated you are there as others would not be ”
“Very helpful, and quick to respond and deal with the issue I was having. Fantastic. Will be using again!”
LET'S GET
STARTED