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

Filter by fitbudget, engagement, size and more

AS
AVAMAE Software Solutions Ltd
Web Development · Web Design · IT Services
AVAMAE is a London-based web development agency that specializes in offering bespoke software solutions.
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FL
FMIS Ltd.
Web Development · Web Design · IT Services
Enterprise Asset Management software provider with more than 30 years of experience in providing industry-leading systems to over 40 countries worldwide.
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RP
Right People Group
Mobile App Development · Web Development · Web Design
Right People Group is specializing in the sourcing of IT contractors, IT freelancers, management and project consultants and delivers the leading IT- and management consultants at…
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DC
Dolphin Computer Access
Web Development · Web Design · IT Services
Millions of blind, partially sighted and dyslexic people around the World choose Dolphin accessible technology for their personal and professional use.
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TG
tado GmbH
UI/UX Design · Software Development · E-Commerce Development
At tado° we believe that unnecessarily wasting energy should be a thing of the past.
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RS
Red Sequence
Mobile App Development · Web Development · Web Design
Red Sequence are specialists in Azure, .NET, full-stack JavaScript and associated Web technologies.
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IL
Inspiretec Ltd
Web Development · Web Design · IT Services
Inspiretec is formed of travel technology company Comtec, multichannel e-commerce technology partner Eysys, creative digital agency Sequence, Finance & HR company Clarius and…
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EI
eezylife Inc.
Web Development · Web Design · IT Services
eezy is a proactive life navigator app, dedicated to maximizing your life by bringing you personalized solutions based on your character, mood, and preferences – powered by…
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T
Trintech
Web Development · Web Design · IT Services
At Trintech, we pride ourselves on providing enterprise-class financial solutions for the Record to Report process to organizations committed to transforming their financial…
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MS
Motion Software
Artificial Intelligence - AI · Web Development · Web Design
We assemble, train and scale world-class dev teams. Our job is to provide key expertise and guidance to large multinationals in the areas of Finance, Big Data, Automation, and AI.
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DT
District Technologies
Web Development · Web Design · IT Services
District is a community engagement platform that helps landlords and companies ensure tenants and employees have a modern frictionless workplace.
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RL
Risk Ledger
Web Development · Web Design · IT Services
Risk Ledger is the world's most innovative vendor risk management solution - helping to secure the entire global third-party ecosystem.
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DN
Digital Nation
Social Media Marketing · Web Development · Web Design
Digital Nation has been active in performance education since 2013, is one of the national pioneers who developed this model, the team behind the DevAcademy project.
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H
HICX
Web Development · Web Design · IT Services
HICX helps the world’s leading companies extract maximum value from their supplier relationships by turning the complexity of supplier management into a strategic advantage.
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G9
Gravity 9
Web Development · Web Design · UI/UX Design
At the top of all organizations 'to do,' list is digital transformation.
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KC
Kodiri.com
Web Development · Web Design · IT Services
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C
CommerceBlock
Web Development · Web Design · IT Services
CommerceBlock‘s public blockchain-based infrastructure enables the distribution, exchange, and storage of tokenized assets and securities.
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RL
REBASOFT Limited
Web Development · Web Design · IT Services
Rebasoft delivers next-generation software to enable network and security operations to become more effective.
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A
Agilisys
Web Development · Web Design · IT Services
Agilisys, an employee-owned organization, is one of the UK’s fastest-growing and innovative cloud and digital transformation specialists, enabling organizations to adopt…
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ES
eSynergy Solutions
Web Development · Web Design · IT Services
eSynergy Solutions is a community-driven software business with three offerings: We build teams & capability through our communities to drive software based outcomes for our…
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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

AVAMAE Software Solutions Ltd

FMIS Ltd.

Right People Group

Dolphin Computer Access

tado GmbH

Red Sequence

Inspiretec Ltd

eezylife Inc.

Trintech

Motion Software

District Technologies

Risk Ledger

Digital Nation

HICX

Gravity 9

Kodiri.com

CommerceBlock

REBASOFT Limited

Agilisys

eSynergy Solutions