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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Drayson Technologies Ltd
Mobile App Development · Web Development · iOS App
Drayson Technologies is a healthcare Internet of Things (IoT) company.
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Intamac Systems
Mobile App Development · Web Development · iOS App
Intamac is an Internet of Things (IoT) enabler and innovator. We help original equipment manufacturers (OEMs) and product vendors to connect their products and appliances to the…
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DevicePilot
Mobile App Development · Web Development · iOS App
DevicePilot is the IoT dashboarding and analytics tool for every member of the business - so you can visualize data, see patterns and trends, and deliver projects faster.
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Asset Mapping
Mobile App Development · Web Development · iOS App
Metrikus gathers information from building systems and other sensors to help our customers understand their buildings.
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RPD International
Mobile App Development · Web Development · iOS App
RPD International helps large businesses launch new products, reducing time and cost in engineering and supply chain.
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Startupbootcamp IoT
Mobile App Development · Web Development · iOS App
Startupbootcamp is a global network of industry-focused accelerators.
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Vivacity Labs
Mobile App Development · Web Development · iOS App
We started with a goal to make a change in the transport industry, using our comprehensive data to drive real-time optimization of the transport network.
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Abelon Systems
Mobile App Development · Web Development · iOS App
The Internet of Things (IoT) is the inter-networking of devices embedded with electronics (including sensors, actuators, and network connectivity) and software that enables those…
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InVMA Limited
Mobile App Development · Web Development · iOS App
Our mission is to connect the world for good. We transform your organization by obtaining data from things to change the way you work.
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Gideon Smart Home
Mobile App Development · Web Development · iOS App
Your smart home in a single app. The smartest home intelligence solution, designed by people. Made by the users and for the users. Always by your side.
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Connected Space Ltd
Mobile App Development · Web Development · iOS App
Sauron Security is a smart, big data cyber-surveillance system that enables visual monitoring, detection and remediation of cyber attacks on IoT devices in real-time.
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Airfi Networks
Mobile App Development · Web Development · iOS App
Founded to make the process of launching cellular-enabled connected devices as easy as possible Airfi Networks is a global company, headquartered in London with offices in San…
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Nublue
Search Engine Optimization · Web Development · Web Design
We are an Agile, North West based eCommerce agency and managed hosting provider, specializing in Magento.
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OpenSensors
Mobile App Development · Web Development · iOS App
At OpenSensors, we believe that technology can't replace good customer service and human interactions.
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Commsworld
Mobile App Development · Web Development · iOS App
Commsworld is Scotland’s leading independently owned Unified Communications Company and ISP (Internet Service Provider) with offices in Aberdeen, Edinburgh, and Glasgow.
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ZIN Technologies
Mobile App Development · Web Development · iOS App
Since 2007 we collaborated with world's largest Mobile Network Operators (T-Mobile, Verizon Wireless, AT&T, Sprint, Soft Bank, ROGERS, Telefonica, list goes on) to integrate their…
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IT Centric
Mobile App Development · Web Development · iOS App
IT Centric is a leading Managed IT Service & Support company offering outsourced IT support, IT consultancy & project delivery to SMEs. Serving Edinburgh, Glasgow & Fife.
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TeskaLabs
Mobile App Development · Web Development · iOS App
TeskaLabs is a software vendor of cybersecurity and data privacy products.
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Data Mill North
Mobile App Development · Web Development · iOS App
Data Mill North is a collaborative website originally set up by Leeds City Council. In March 2014, we had a plan.
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Hardware Pioneers
Mobile App Development · Web Development · iOS App
Hundreds of Startup Founders, EXECUTIVES, ENGINEERS, And Developers Meet Every Month to Listen to Insightful Talks and Establish Key Relationships.
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WICASTR
Mobile App Development · Web Development · iOS App
Our SMART Edge Computing Solution is a content distribution platform with patented technology designed to deploy and host applications, and to provide compute capabilities…
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The PR Room
Mobile App Development · Web Development · iOS App
The PR Room is one of the UK’s leading consumer electronics, lifestyle and IT public relations agencies.
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Insiso Ltd
Mobile App Development · Web Development · iOS App
At Insiso we provide bespoke software development services to a wide a variety of industries.
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Bright Ascension Ltd
Mobile App Development · Web Development · iOS App
Bright Ascension was founded in 2011 to offer a fresh and innovative approach to space software.
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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

Drayson Technologies Ltd

Intamac Systems

DevicePilot

Asset Mapping

RPD International

Startupbootcamp IoT

Vivacity Labs

Abelon Systems

InVMA Limited

Gideon Smart Home

Connected Space Ltd

Airfi Networks

Nublue

OpenSensors

Commsworld

ZIN Technologies

IT Centric

TeskaLabs

Data Mill North

Hardware Pioneers

WICASTR

The PR Room

Insiso Ltd

Bright Ascension Ltd