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.

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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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TBSCG
Web Development · Web Design · IT Services
TBSCG has more than 16 years of enterprise enablement experience, helping our global customers implement and maintain complex enterprise solutions.
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Contino
Web Development · Web Design · IT Services
Contino is a global Enterprise DevOps, Data and Cloud Transformation Consultancy.
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nubeGO
Web Development · Web Design · IT Services
NubeGO wants to ensure that the speed and scalability of the cloud are available and ever-present in organizations across the globe.
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Cognito iQ
Web Development · Web Design · IT Services
Cognito iQ is a combination of intelligent mobile workforce management software, best-practice processes and proven techniques.
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PiXL3
Search Engine Optimization · Web Development · Web Design
If you need a beautiful, responsive website site that works across every device, we'd love to hear from you! We design beautiful web experiences on world-class platforms.
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SoBold
Web Development · Web Design · UI/UX Design
We are a dynamic, London-based agency, specialising in website design and development. We create new websites and re-design existing ones.
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MMT Digital
Mobile App Development · Web Development · Web Design
MMT Digital, a technical consultancy specializing in the delivery of effective digital solutions, supports CIOs, CTOs, and CDOs to drive faster change and increased customer value.
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GlobalData Plc
Web Development · Web Design · IT Services
The world is changing exponentially, resulting in unprecedented opportunities and challenges that individual organizations and entire industries need to understand and navigate.
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Netrix Ltd
Web Development · Web Design · UI/UX Design
Netrix creates effective digital experiences across platforms and devices.
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Experian
Social Media Marketing · Web Development · Web Design · Also in United States of America
Experian unlocks the power of data to create opportunities for consumers, businesses, and society.
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Markit
Web Development · Web Design · IT Services
IHS Markit is a global leader in information, analytics and solutions for the major industries and markets that drive economies worldwide.
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Level39
Web Development · Web Design · IT Services
Level39 is the world's most connected tech community, with over 200 tech startups and scale-ups based onsite.
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Acturis Limited
Web Development · Web Design · IT Services
Acturis is one of the UK’s highest-rated and fastest-growing technology companies, dedicated to delivering awesome solutions for our clients, helping them streamline their business…
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Final Stage
Web Development · Web Design · IT Services
We’re reducing the mass talent wastage in the internal hiring-space and benefiting both companies and candidates in doing so.
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Boldon James
Web Development · Web Design · IT Services
Boldon James is an industry specialist in data classification and secure messaging, delivering globally-recognized innovation, service excellence and technology solutions that…
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Stroma
Web Development · Web Design · IT Services
Stroma Group is a leading organization in the construction, energy performance, building control and software sectors, supporting the industry throughout the RIBA Plan of Work.
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Unify
Web Development · Web Design · IT Services
Unify is the Atos brand for communication and collaboration solutions.
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Timico
Web Development · Web Design · IT Services
At Timico, we don’t shy away from a challenge. We work in partnership with our clients, devising and delivering transformative IT strategies to propel mid-market businesses and…
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Say It Now
Web Development · Web Design · IT Services
SayItNow is a specialist technology company that helps brands take advantage of opportunities created by consumers shifting to conversational channels Your customers increasingly…
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European Electronique
Web Development · Web Design · IT Services
European Electronique is a successful privately-owned company with a turnover of £58M and 158 permanent members of staff.
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broadbandchoices.co.uk
Social Media Marketing · Web Development · Web Design
You spend around eight hours a day using digital devices, and fork out over £1,500 every year on the digital market - broadband connections, mobile tariffs, upgrades and so on - so…
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Verne Global
Web Development · Web Design · IT Services
Verne Global delivers true high-performance computing solutions in an optimized environment, built upon renewable resources.
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Infobip
Web Development · Web Design · IT Services
Infobip is a global leader in omnichannel engagement powering a broad range of messaging channels, tools and solutions for advanced customer engagement, authentication, and…
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Lighthouse Solutions Oy
Mobile App Development · Web Development · Web Design
Lighthouse is a cloud software and services company that helps international companies to integrate and automate strategic management; strategy formulation, strategic investment…
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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

TBSCG

Contino

nubeGO

Cognito iQ

PiXL3

SoBold

MMT Digital

GlobalData Plc

Netrix Ltd

Experian

Markit

Level39

Acturis Limited

Final Stage

Boldon James

Stroma

Unify

Timico

Say It Now

European Electronique

broadbandchoices.co.uk

Verne Global

Infobip

Lighthouse Solutions Oy