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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Vertex Solutions International Ltd
Web Development · Web Design · IT Services
Vertex Solutions Ltd is a specialist IT and technical recruitment company, with over 15 years of experience in consultancy, search and selection.
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Cyberfort Group
Web Development · Web Design · IT Services
The Cyberfort Group has been established to bring together the best of breed products and services in the field of data security by a combination of targeted acquisition, industry…
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BusinessOptix
Web Development · Web Design · UI/UX Design
The pace of change has moved up gears to fast and faster. Thriving in this era of unprecedented opportunity and challenge requires a clear view of how the organization’s DNA –…
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Secarma Ltd
Web Development · Web Design · IT Services
Secarma Limited is an established, independent security consultancy, specializing in Penetration Testing.
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Broadstone App
Mobile App Development · Web Development · Web Design
Broadstone’s “Labour-as-a-Service” temporary staffing platform allows thousands of job seekers to find fair and flexible temporary work opportunities with some of the largest…
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NCC Group
Web Development · Web Design · IT Services
NCC Group is a global expert in cybersecurity and risk mitigation, working with businesses to protect their brand, value, and reputation against the ever-evolving threat landscape.
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Pirum Systems
Web Development · Web Design · CSS3
Pirum offers a secure, centralized automation and connectivity hub for global securities finance transactions, enabling complete automation of the post-trade and collateral…
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U S P a a H
Web Development · Web Design · IT Services
USPAAH is London's mobile spa. Our expert Sparistas deliver massage, nails and beauty services to your home, hotel or office in London, zones 1-3.
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6point6
Web Development · Web Design · IT Services
Integrating digital technology into your business can result in fundamental changes to how you operate and deliver value to your customers.
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Key IVR
Web Development · Web Design · IT Services
Key IVR is a privately owned business offering automated payment services in the UK and internationally through Europe and into the United States.
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Truphone
Web Development · Web Design · IT Services
Truphone believes that connectivity can be easier, smarter and more efficient.
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Seatfrog
Web Development · Web Design · IT Services
Seatfrog is transforming the way Airlines and Rail providers sell a matrix of ancillaries from booking right up to departure.
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My Clever Group
Web Development · Web Design · Software Testing
MyCleverGroup's aim is to help empower businesses using the latest technology.
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Improved Apps
Web Development · Web Design · IT Services
We revolutionize the way people engage with information and make it useful.
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Reevoo
Web Development · Web Design · IT Services
Millions of shoppers use Reevoo to make better buying decisions in their everyday lives.
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Employtec
Web Development · Web Design · IT Services
We have built a cloud-based talent platform to revolutionize the way that companies use technology to find and hire people.
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Multiplay
Web Development · Web Design · IT Services
For over 20 years Multiplay has ensured gamers have the best possible experience while gaming online.
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Ocius Professional Services
Web Development · Web Design · IT Services
We are problem solvers and real solution provider. Working with the organization to review Technology, Processes, Security and Governance with a keen eye on the needs and vision,…
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TESLASUIT
Web Development · Web Design · IT Services
Teslasuit is the unique world's first full-body haptic suit, named CES 2019 Innovation Awards Honoree in a category of Virtual and Augmented Reality.
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Annodata Ltd
Web Development · Web Design · IT Services
Annodata is an independent company specializing in the provision of ICT and Print technology Managed Services.
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BritWeb
Search Engine Optimization · Web Development · Web Design
BritWeb is a market leader in web design and digital marketing, based in the bustling heart of Horsham, West Sussex.
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Aiimi
Web Development · Web Design · IT Services
Free-thinking and brighter doing, we're the friendly, smarter alternative for organisations that understand how data expertise can help them thrive.
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ExtraHop
Web Development · Web Design · IT Services · Also in United States of America
ExtraHop delivers enterprise cyber analytics that allows you to quickly investigate threats, ensure the delivery of critical applications, and secure your investment in the cloud.
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Secon Cyber
Web Development · Web Design · IT Services
Established in 1999 we have long-standing experience of providing class-leading cybersecurity solutions to customers ranging from small to large enterprises.
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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

Vertex Solutions International Ltd

Cyberfort Group

BusinessOptix

Secarma Ltd

Broadstone App

NCC Group

Pirum Systems

U S P a a H

6point6

Key IVR

Truphone

Seatfrog

My Clever Group

Improved Apps

Reevoo

Employtec

Multiplay

Ocius Professional Services

TESLASUIT

Annodata Ltd

BritWeb

Aiimi

ExtraHop

Secon Cyber