Companies · category

Top IT Service Providers for JavaScript in the UK

477 IT service providers ranked by rating, review volume and listing quality.

JavaScript spans more ground than any other language on this list. It runs in every browser, on servers through Node, and inside mobile and desktop applications, so a firm listing it may be doing front-end interface work, back-end services, or both.

The useful clarification is which part of the stack, and with what. Front-end work is dominated by a handful of frameworks and the choice affects hiring for years afterwards. Back-end JavaScript competes with other server languages and is chosen for good reasons and bad ones. Ask why they would pick it for your project specifically — a clear answer indicates a team choosing tools, and a vague one indicates a team using whatever they already know.

Want your company here?

Between them, the 476 best-ranked of these 477 IT service providers cover web development (464), web design (380), PHP (304) and .NET (288). They also list work in London and United States of America. 473 of them have written a profile you can read before you get in touch.

We list more than 450 IT service providers in the UK listed for JavaScript development. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: Zepto Systems ltd, Marzee Labs and Webcurl LTD.

Before you shortlist, check

Which frameworks they use, and why for your project
Automated tests and code review as standard
Performance and accessibility targets agreed up front
How dependencies are kept up to date after launch

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Jump Twenty Four
Mobile App Development · Web Development · Web Design
We build wonderful web and mobile apps for businesses big and small. Small but specialized we are not a software house, nor are we a pure-play creative agency.
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Limitless Digital
Mobile App Development · Web Development · Web Design
Passionate about Content Marketing, SEO, Social Media, and Digital Marketing.
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Cognifide
Web Development · Web Design · IT Services
Cognifide is a WPP marketing technology consultancy that works with some of the world’s leading businesses to deliver exceptional customer experiences.
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DataMatters Ltd.
Web Development · Web Design · Software Development
Datamatters is a computer software company that provides MultiValue/Pick application software and consulting services to the insurance industry.
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Cyber Risk Management Group
Web Development · Web Design · IT Services
Cyber Risk Management Group is a leading provider of cybersecurity and information risk consultancy services.
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Open Connections
Web Development · Web Design · IT Services
Open Connections are one of the longest established IBM and Kofax partners for helping businesses transform their business processes typically where documents and data are…
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Arni Media
Mobile App Development · Web Development · Web Design
Arni Media is a design lead, new media agency, providing the best quality design for web and print.
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Agent Software Ltd.
Search Engine Optimization · Web Development · Web Design
Agent Software builds cutting edge software for UK property professionals.
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i6 Group
Mobile App Development · Web Development · Web Design
i6 specializing in web and mobile application development and systems integration to offer modern, flexible and modular software platforms for the aerospace, defence, utility, and…
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Flooid
Web Development · Web Design · IT Services
We’re working on some of the most exciting projects in retail. Seamless baskets across all channels give retailers the power to sell more. We welcome the brightest and best.
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makepositive
Mobile App Development · Social Media Marketing · Web Development
makepositive is a multi-award-winning Platinum Salesforce consulting partner with a team of over 180 experts who have successfully delivered over 1400 projects so far.
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Ultima Business Solutions
Web Development · Web Design · IT Services
“To become the trusted long-term IT partner of UK businesses by providing robust and flexible solutions which bring real business benefit.” No matter where you are on your IT…
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BuildEmpire Ltd
Mobile App Development · Web Development · Web Design
We are software development experts. At BuildEmpire, we’ve been helping businesses grow and succeed since 2002, building software & websites that help people solve problems.
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Invisible Systems
Search Engine Optimization · Web Development · Web Design
Invisible Systems are a dynamic and innovative company based in Cumbria that supply and design a wide range of wireless monitoring systems for a variety of applications.
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Acuma Solutions
Web Development · Web Design · Software Development
Acuma, a leading provider of Information Management solutions, has unrivaled expertise in Business Intelligence and Information Management.
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The Developer Society
Search Engine Optimization · Web Development · Web Design
Dedicated to creating technology to make the world a better place, we are the world’s first nonprofit team of developers and campaigners run by and for the nonprofit sector.
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WDL (Website Design Ltd)
Mobile App Development · Web Development · Web Design
WDL is a full-service digital agency, based in Colchester, Essex.
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ADZ Creative & Digital Limited
Mobile App Development · Search Engine Optimization · Web Development
ADZ Media is a successful advertising agency and web design company located in Manchester UK with a talented team of creative and skilled designers, Google specialists,…
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Executive Resource Group
Web Development · Web Design · IT Services
Placing the best people at the heart of technical change – through IT and HR transformation – as well as essential public service delivery.
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tecnologika
Web Development · Web Design · IT Services
Incorporated in London during the peak of the global recession, tecnologika has utilized solutions-focused & verticalized industry expertise to design, deliver & deploy IT…
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Veridium
Web Development · Web Design · IT Services
Veridium's software can reduce or eliminate identity as a major attack vector, by replacing the vulnerable password with biometric authentication.
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Natilik
Web Development · Web Design · IT Services
Natilik is a specialist global IT & Communications provider, head quartered in London with offices in New York, Sydney and Singapore.
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Kinseed
Mobile App Development · Web Development · Web Design
Every organization is different. That’s what makes your business special.
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Mapp Digital UK Ltd.
Mobile App Development · Web Development · UI/UX Design
We support companies in target-oriented and attractive marketing to outperform the competition without throwing money out of the window.
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How is this ranking worked out?

The order comes from what each firm publishes and what has been verified about it, and never from payment:

Profile completeness: the details a buyer needs to judge a firm — what it does, who it serves, how it prices, who it has worked for
Earned trust: verification, awards and the other checks a firm has actually passed
Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

Sponsored listings are labelled and shown apart from this list. How rankings work

Only firms whose profile names the UK are counted here, so a firm that lists a town but no country is not yet included.

Where else can I look?

The same list elsewhere: USA (762) · India (392) · Germany (214) · Ukraine (145).

Other specialisms in the UK: UI/UX design (941) · e-commerce (854) · Android app development (812) · iOS app development (800) · WordPress (752).

Every IT service provider in the UK: the full list.

Every category in the UK: the UK country page.

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Everything here links back to the same verified catalogue. Pick your next stop.

Top IT Service Providers for JavaScript in the UK

Jump Twenty Four

Limitless Digital

Cognifide

DataMatters Ltd.

Cyber Risk Management Group

Open Connections

Arni Media

Agent Software Ltd.

i6 Group

Flooid

makepositive

Ultima Business Solutions

BuildEmpire Ltd

Invisible Systems

Acuma Solutions

The Developer Society

WDL (Website Design Ltd)

ADZ Creative & Digital Limited

Executive Resource Group

tecnologika

Veridium

Natilik

Kinseed

Mapp Digital UK Ltd.