Top 100 JavaScript Development Companies in the United Kingdom

An investment management firm was looking for a developer for build a high-end WordPress site that could handle high volume traffic. Human Made developed a robust back end, consultation, and testing services on a tight timeline. The site is also scalable and able to handle millions of monthly users. 

"They do a very good job of meeting their estimations....For companies like ours, I would be more than happy to refer them." - CEO, Investment Management Firm 

Tivix worked with an intergovernmental military alliance to rebuild a mission-critical software system. If and when submarines in international waters come into distress, the organization plans and coordinates the rescue effort of such submarines. Tivix was given complex system requirements and asked to come up with an effective design and solution that would replace a decades-old system. The client was incredibly impressed at every stage of the engagement, with Tivix delivering detailed systems and user-experience design, followed by robust development and operationalization of the system internationally. 

“Every single milestone has been met exactly on time. The company has met every requirement, both in terms of time as well as quality.” Maritime Service Owner, Intergovernmental Military Alliance

xDesign developed to help a modular building manufacturer better monitor its product delivery. The client mapped out its goals, from which they designed wireframes, prototyped, and ultimately delivered the app. The client was impressed with their ability to understand the project goals and provide input to improve the product. 

"They picked up our business process very very quickly and they were very good at pointing out things they thought might be better." – IT & Digital Manager, Modular Building Manufacturer

DCSL GuideSmiths redeveloped the recruitment software system of a construction firm. After laying out their requirements, DCSL GuideSmiths designed, tested, and delivered on the system. The client was pleased with the project and felt that DCSL GuideSmiths' skills made the collaboration extremely easy. 

"We were able to see straightaway how the system would look and work. That’s another reason it went so smoothly." – Manager, Support Department, Construction Firm

iTechArt Group is assisting with the development of a content management software for video advertisements. The team is building the system to accommodate multiple social media platforms like YouTube and Facebook.

“The engagement has been very successful overall thus far. The work we've been able to quickly launch wouldn't have been possible without iTechArt's help. In addition to the quality of their code, they've also integrated extremely well into our team, adapting to our internal processes relatively seamlessly.” – Founder & CTO, Software Consulting Agency

Under a tight deadline, Ready4S developed and implemented an app solution to give the client’s employees easier access to customer data. The team earned praise for its cooperative approach, project management skills, and quality results.

“I am pleased with our effective cooperation with Ready4S. … I highly recommend Ready4S as a reliable partner.” – Former Sales Support Director, Global Bank

A caller ID company hired Unosquare, LLC to provide software engineering and QA resources. Assisting on various projects, Unosquare provided daily support in all aspects of application development.

"I have been most impressed with the caliber of the technical resources provided by Unosquare." – Senior Director Software Engineering, Caller ID Company

GearedApp developed apps for a poultry breeding company. The client needed three different apps for its separate global brands. GearedApp took over from another developer and added several new functionalities, improving the design of the apps and decreasing their download times. The client was impressed by the improvements that were made to the product and the speed with which they were implemented.

“They’ve improved both the apps’ design and functionality and dramatically reduced their download time.” – Assistant Marketing Manager  

Clock Limited redesigned a website for a news and media outlet. The team also built a custom CMS for the client. The site forms the foundation of the internal team's business.

"The CMS is fantastic and they have been very receptive to our ideas, no matter how big or small." – Site Editor, News Outlet

Zoocha created a web application for a UK oil and gas energy network. Using Drupal extensions and PHP scripting, Zoocha made an interactive platform for tracking and storing information. The client was impressed with Zoocha's work.

"The refresh that we did with Zoocha Ltd has increased business value by three times, and in some areas, it’s about six times. We haven’t had any bugs or crashes." - CEO, UK Energy Service Firm

Imaginary Cloud worked on custom software development for an enterprise software platform. Using Angular and Node.js and working from designs, their team built the product with a configurable frontend. They continued to provide support and the client was very pleased with the team’s work.

“Imaginary Cloud created the entire architecture for our app and designed it for large user populations. The platform helped us grow significantly, which led us to win millions of pounds worth of contracts. Their team is intrinsic to our success.” – Strategy Director, Enterprise Software Platform

Propeller developed and designed a creative website for a photography studio. The team also performed digital marketing services, crafting keywords. SEO campaigns improved search results and mobile usage.

"Propeller created a platform that represents me, my taste and artistic level."– Founder, Photography Studio

DabApps built an app for an illustration agency. They created apps for Android and iOS that fit the client's specifications and incorporated their visuals, artwork, and custom emojis. The client was very satisfied with the product, and with the professional partnership. 

“They were really good. They stuck to all the deadlines we set which were quite tight at times. They had very good project management overall.” – Agent, Illustration Agency
 

Fueled designed a bidding-style app for a company that deals with nightlife reservations. They built the app from scratch, taking into consideration what the company wanted, as well as giving advice. The app had a lot of functions, such as a list of venues, submission options, and tools that allowed notifications to be sent from venues.

“They’re incredibly efficient in the work that they do and know what they're doing in design, coding, and executing their ideas. They have a great understanding of what's current and get things done very quickly compared to others.” – Founder, Mobile App

A cloud platform developer hired Myplanet for assistance with digital strategy, information architecture, and user experience. The client's goal was to rebrand and reposition its digital presence as it moved away from providing hardware to providing cloud services. The client appreciated Myplanet's "customer-centric" approach to project management.

"From day one to January 2015, we experienced a 300% increase in site traffic and 200% increase in leads coming from the web. Our bounce rate went down and our net promoter score went up." - Chief Marketing Officer & SVP of Business Operations, Cloud Platform Developer 

Catch helped an international conservation charity with multiple projects. First, they rebuilt a Drupal E-commerce website and built the CMS for the organization. In addition, the team manages the integration with ticketing and the CRM. Finally, they also worked on developing two applications. The company's website work resulted in increases in the number of users on the site and views.  

"We’ve seen a positive impact on the site and how people have used it. We’ve had increases in users, conversion rates, page views, and so on." – Head of Digital Services, International Conservation Charity 

Theodo UK developed the platform for an online marketplace after the previous developer proved unsatisfactory. The team took wire frames and a prototype provided by the client to build a minimum viable product, using AWS, React, Python, and Django for the framework. The client spoke highly of the engagement.

“They’re extremely knowledgeable and work closely with us to make sure we know what’s going on. Their team is phenomenal and have both dev and interpersonal skills.” — Executive, Digital Office Marketplace

After a wellness resort was acquired by another company, it needed to rebrand and hired IdeaWork Studios. The project included creating a new name and logo for the resort, updating its website to reflect the new branding, and launching an advertising campaign.

"The level of creativity they showed for a complete rebranding was impressive. We needed to take the resort in a completely different direction, and they did it very quickly. It was impressive what they understood about the brand and what they put forward from a presentation standpoint." – Director of Sales and Marketing, Wellness Resort

PowerGate was hired by a consulting company to help develop a custom application that analyzes the costs and identifies potential improvements in multiple factories for one of its clients. PowerGate was able to provide the necessary assistance despite the complex requirements and tight deadline.

"They have precise deadlines and a strict agile approach." - Head of Data Science, Consulting Company

A skiing electronics company hired Series Eight for a complete website redesign. They wanted to optimize user experience and increase sales. Since the website's launch, conversion rates have increased. 

"They have been absolutely excellent. Despite both our team and their team being remote, we’ve managed to maintain outstanding communication."–CCO, Skiing Electronics Company 

A shipping company on the Black Sea hired Solar Digital to design and build a CRM platform. The product needed to be able to handle a considerable flow of data from large cargo operations, including bulk shipping that does not use containers. Solar Digital created a system for tracking and managing shipments and port facilities, which automated many steps in the client's process.

"Our work and our financial returns have increased 3 times since 2014." –Commercial Director, Ukrainian Shipping Firm

A government contractor previously had a website that was managed by one company and whose servers were hosted by another. They chose to consolidate all their website work at CTI Digital, who now hosts their servers, provides Drupal development, and updates the website and CRM.

"The support is really great. The team that deals with support is absolutely brilliant...We have a very good two-way working relationship." — Project Manager, Government Contractor

Zesty was responsible for web design and development for a tourism board. The project included developing a brand new website with an engaging design, along with transferring pre-existing data from the old platform to the new one. The client reports that the new site has led to double-digit growth in page views.

"I was impressed by their ability to relate to us, understand our needs, and work towards the bigger picture." - CEO, Tourism Board

Box UK was hired by an Employee Benefits Service to oversee and advise on the Service's new e-commerce platform. But their service was expanded to include the development of the platform, rewriting some parts in Symfony from the original CakePHP. The client was so satisfied with the work that Box UK is still onboard to supply new features on the platform as needed. 

"Box UK has a very modern, agile approach and is good at looking at new methods of working." - Project Manager, Employee Benefits Service 

Thought&Function developed an app for a personal finance company. The app was built entirely from scratch using React Native for both Android and iOS platforms. The app was released earlier than scheduled.

“For me, what sets them apart is the relationship.” - Founder, Personal Finance Company

An internet services company partnered with Purr Digital for a technical solution and software platform for their mobile app. They provided the client with design, software development, and backend support for the mobile application. This resulted in a 35% conversion in regions that received 400 transactions the first two weeks.

”Their team has made constructive suggestions for features that we didn’t even think about, which has been quite crucial actually. They did a fantastic job. No one on my team is highly technical and Purr Digital guided us through the whole process.” — Director, Internet Services Company

Tapptitude developed an app prototype for a food ordering company. They executed the food ordering company’s vision perfectly and were retained to develop the full product. Some app features Tapptitude developed included platform signup, payment systems, and restaurant menu integration.

“The proof that I’ve been happy with Tapptitude is that we’ve continued working long-term, even though I’ve had the option to use in-house developers. I felt that the communication was great and, most importantly, the quality Tapptitude provides is amazing, as is the communication.” – CEO, Food Ordering App

DEGO worked with a spirits supplier to assist with its brand activation campaign, which included site development, promotional video production, and the creation of a VR app for iOS. They redesigned the site's UI, filmed a promotional video, and worked with Google Cardboard for the VR app; DEGO made sure to implement offline capabilities in the mobile app, and included an intuitive interface for staff and users alike to use without directions.

"We appreciated DEGO’s quick turnaround." - Marketing Manager, Spirits Supplier

One of Innovify’s clients, an on-demand delivery platform, wanted to streamline how merchants and businesses placed orders and how they assigned drivers. Innovify developed an Android app and website and helped with marketing and strategy.

“I have worked with a couple of these companies before, but they haven’t been as process-oriented as Innovify. They have good processes in place and everything was good for me.” – Founder, Logistics Company

A fashion retailer was trying to create a website from scratch for the first team and needed to outsource the development. Made Tech worked from wireframes and graphics to develop the backend of a customized e-commerce website.

"We’ve got a best-in-class conversion rate across multiple devices, so I think that’s testament to the fact the site works well...From a project management perspective, they’ve been very good. It’s been a very collaborative effort." — Founder & CEO, Fashion Retailer