Period
to 15 April 2021

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for JavaScript skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JavaScript over the 6 months to 15 April 2021 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

JavaScript (including ECMAScript)
Central London > City of London
6 months to
15 Apr 2021
Same period 2020 Same period 2019
Rank 14 11 9
Rank change year-on-year -3 -2 -1
Contract jobs citing JavaScript 233 421 828
As % of all contract jobs advertised in the City of London 9.55% 10.47% 12.19%
As % of the Programming Languages category 19.93% 21.37% 23.76%
Number of daily rates quoted 174 309 674
10th Percentile £327 £363 £400
25th Percentile £413 £419 £450
Median daily rate (50th Percentile) £511 £525 £500
Median % change year-on-year -2.62% +5.00% -
75th Percentile £575 £600 £584
90th Percentile £696 £675 £650
Central London median daily rate £500 £525 £500
% change year-on-year -4.76% +5.00% -
Number of hourly rates quoted 0 5 8
Median hourly rate - £48.50 £35.00
Median % change year-on-year - +38.57% +29.20%
Central London median hourly rate £14.00 £48.50 £35.00
% change year-on-year -71.13% +38.57% +29.20%

JavaScript is in the Programming Languages category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for coding skills.

All Programming Languages
City of London
Contract vacancies with a requirement for coding skills 1,169 1,970 3,485
As % of all contract IT jobs advertised in the City of London 47.93% 48.99% 51.30%
Number of daily rates quoted 883 1,568 2,831
10th Percentile £363 £381 £400
25th Percentile £450 £450 £463
Median daily rate (50th Percentile) £550 £525 £525
Median % change year-on-year +4.76% - -
75th Percentile £638 £625 £613
90th Percentile £713 £688 £675
Central London median daily rate £550 £525 £525
% change year-on-year +4.76% - +2.44%
Number of hourly rates quoted 3 13 17
10th Percentile £15.55 £24.50 £15.08
25th Percentile £17.86 £26.75 "
Median hourly rate £23.45 £48.50 £21.00
Median % change year-on-year -51.65% +130.95% -2.33%
75th Percentile £31.21 £53.00 £37.50
90th Percentile £34.84 £57.30 £45.10
Central London median hourly rate £21.73 £48.00 £21.75
% change year-on-year -54.74% +120.69% +1.16%

JavaScript
Job Vacancy Trend in the City of London

Job postings citing JavaScript as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for JavaScript in the City of London

JavaScript
Contractor Daily Rate Trend in the City of London

3-month moving average daily rate quoted in jobs citing JavaScript in the City of London.

Daily rate trend for JavaScript in the City of London

JavaScript
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing JavaScript in the City of London over the 6 months to 15 April 2021.

Daily rate histogram for JavaScript in the City of London

JavaScript
Contractor Hourly Rate Trend in the City of London

3-month moving average hourly rates quoted in jobs citing JavaScript in the City of London.

Hourly rate trend for JavaScript in the City of London

For the 6 months to 15 April 2021, IT contractor jobs citing JavaScript also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for JavaScript.

1 109 (46.78%) Agile Software Development
2 100 (42.92%) React
3 88 (37.77%) HTML
4 85 (36.48%) DevOps
5 82 (35.19%) TDD
6 79 (33.91%) AngularJS
7 76 (32.62%) CSS
8 70 (30.04%) Azure
9 69 (29.61%) Software Engineering
10 60 (25.75%) TypeScript
11 59 (25.32%) Node.js
12 53 (22.75%) AWS
13 52 (22.32%) HTML5
14 51 (21.89%) Continuous Integration
14 51 (21.89%) Java
15 44 (18.88%) C#
15 44 (18.88%) .NET
15 44 (18.88%) Docker
16 41 (17.60%) Front End Development
17 39 (16.74%) Jenkins
17 39 (16.74%) Git (software)
18 38 (16.31%) QA
18 38 (16.31%) Microservices
18 38 (16.31%) Greenfield Project
19 36 (15.45%) Continuous Improvement
19 36 (15.45%) PowerShell
20 34 (14.59%) Power BI
20 34 (14.59%) Power Platform
21 33 (14.16%) Analytics
21 33 (14.16%) SQL Server

JavaScript
Co-occurring IT Skills in the City of London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 31 (13.30%) SharePoint
2 8 (3.43%) Apache
3 7 (3.00%) Red Hat Fuse
4 4 (1.72%) Cloud Foundry
4 4 (1.72%) CMS
4 4 (1.72%) Elasticsearch
4 4 (1.72%) nginx
4 4 (1.72%) SharePoint 2010
5 3 (1.29%) Camunda
5 3 (1.29%) Jupyter
5 3 (1.29%) WordPress
6 2 (0.86%) Apache Spark
6 2 (0.86%) Confluence
6 2 (0.86%) Umbraco
7 1 (0.43%) Adobe Experience Manager
7 1 (0.43%) Appian
7 1 (0.43%) IIS
7 1 (0.43%) Moodle
7 1 (0.43%) Oracle SOA Suite
7 1 (0.43%) SugarCRM
Applications
1 4 (1.72%) InfoPath
2 2 (0.86%) Chatbot
Business Applications
1 3 (1.29%) Dynamics CRM
2 2 (0.86%) Magento
3 1 (0.43%) Payment Gateway
Cloud Services
1 70 (30.04%) Azure
2 53 (22.75%) AWS
3 34 (14.59%) Power Platform
4 26 (11.16%) Azure Active Directory
5 12 (5.15%) Serverless
6 10 (4.29%) GCP
7 6 (2.58%) AWS CloudFormation
7 6 (2.58%) AWS Lambda
7 6 (2.58%) PaaS
8 5 (2.15%) GitHub
8 5 (2.15%) npm
8 5 (2.15%) SaaS
9 4 (1.72%) Amazon ECS
9 4 (1.72%) Amazon ElastiCache
9 4 (1.72%) Amazon Kinesis
9 4 (1.72%) Microsoft 365
9 4 (1.72%) Slack
10 3 (1.29%) Apigee
10 3 (1.29%) Azure Stack
10 3 (1.29%) Dynamics 365
Communications & Networking
1 4 (1.72%) HTTP
2 2 (0.86%) HTTPS
3 1 (0.43%) DNS
3 1 (0.43%) Firewall
3 1 (0.43%) Internet
3 1 (0.43%) NAS
3 1 (0.43%) Network Security
3 1 (0.43%) SAN
3 1 (0.43%) SSL
Database & Business Intelligence
1 34 (14.59%) Power BI
2 33 (14.16%) SQL Server
3 14 (6.01%) Relational Database
4 12 (5.15%) MongoDB
5 11 (4.72%) MySQL
6 10 (4.29%) NoSQL
6 10 (4.29%) PostgreSQL
7 5 (2.15%) Tableau
8 4 (1.72%) RDBMS
9 3 (1.29%) Couchbase
9 3 (1.29%) SQL Server Integration Services
10 2 (0.86%) Amazon DynamoDB
10 2 (0.86%) Apache Cassandra
10 2 (0.86%) Apache Hive
10 2 (0.86%) Big Data
10 2 (0.86%) Cloud Spanner
10 2 (0.86%) Flink
11 1 (0.43%) ArangoDB
11 1 (0.43%) Cosmos DB
11 1 (0.43%) Data Lake
Development Applications
1 39 (16.74%) Git (software)
1 39 (16.74%) Jenkins
2 26 (11.16%) Octopus Deploy
3 12 (5.15%) Cucumber
3 12 (5.15%) webpack
4 9 (3.86%) JIRA
4 9 (3.86%) Selenium
5 8 (3.43%) Jasmine
6 5 (2.15%) JUnit
6 5 (2.15%) Karma Test Runner
6 5 (2.15%) Mocha
7 4 (1.72%) Cypress.io
7 4 (1.72%) Protractor
8 3 (1.29%) Babel
8 3 (1.29%) CircleCI
8 3 (1.29%) Postman
8 3 (1.29%) SoapUI
9 2 (0.86%) Bitbucket
9 2 (0.86%) Gatling
9 2 (0.86%) Gradle
General
1 30 (12.88%) Banking
2 29 (12.45%) Finance
3 9 (3.86%) Marketing
4 8 (3.43%) Retail
5 5 (2.15%) Front Office
6 3 (1.29%) Investment Banking
6 3 (1.29%) Public Sector
7 2 (0.86%) Back Office
7 2 (0.86%) Games
7 2 (0.86%) Retail Banking
8 1 (0.43%) Aerospace
8 1 (0.43%) Financial Institution
8 1 (0.43%) Law
8 1 (0.43%) Legal
8 1 (0.43%) Multimedia
8 1 (0.43%) Telecoms
Job Titles
1 167 (71.67%) Developer
2 27 (11.59%) JavaScript Developer
3 26 (11.16%) React Developer
4 24 (10.30%) Java Developer
5 23 (9.87%) Senior Developer
6 22 (9.44%) Technical Leader
7 21 (9.01%) Backend Developer
7 21 (9.01%) Front End Developer (Client-Side Developer)
8 18 (7.73%) PHP Developer
9 17 (7.30%) Full Stack Developer
10 10 (4.29%) Architect
11 9 (3.86%) Node.js Developer
12 8 (3.43%) Angular Developer
12 8 (3.43%) Solutions Architect
13 7 (3.00%) Java Architect
13 7 (3.00%) Java Solutions Architect
13 7 (3.00%) Senior Java Developer
14 6 (2.58%) .NET Developer
14 6 (2.58%) C# Developer
14 6 (2.58%) SharePoint Developer
Libraries, Frameworks & Software Standards
1 100 (42.92%) React
2 88 (37.77%) HTML
3 79 (33.91%) AngularJS
4 76 (32.62%) CSS
5 59 (25.32%) Node.js
6 52 (22.32%) HTML5
7 44 (18.88%) .NET
8 32 (13.73%) CSS3
8 32 (13.73%) Redux
9 31 (13.30%) REST
9 31 (13.30%) Spring
10 28 (12.02%) Sass
11 27 (11.59%) ASP.NET
11 27 (11.59%) Web Services
12 26 (11.16%) ASP.NET Core
13 22 (9.44%) GraphQL
14 21 (9.01%) LESS
15 20 (8.58%) Vue.js
16 19 (8.15%) Laravel
17 18 (7.73%) Spring Boot
Miscellaneous
1 38 (16.31%) Greenfield Project
2 16 (6.87%) User Experience
3 12 (5.15%) Enterprise Software
4 11 (4.72%) Clustering
5 6 (2.58%) Mobile App
6 5 (2.15%) Analytical Skills
7 4 (1.72%) Cloud Native
8 3 (1.29%) Fixed Income
9 2 (0.86%) Client/Server
9 2 (0.86%) Foreign Exchange (FX)
9 2 (0.86%) Grid Computing
9 2 (0.86%) Management Information System
9 2 (0.86%) Renewable Energy
9 2 (0.86%) Self-Motivation
9 2 (0.86%) Virtual Team
10 1 (0.43%) Data Centre
10 1 (0.43%) Data Structures
10 1 (0.43%) Equities
10 1 (0.43%) Linux Command Line
10 1 (0.43%) Media Streaming
Operating Systems
1 14 (6.01%) Linux
2 5 (2.15%) Apple iOS
3 4 (1.72%) Android
3 4 (1.72%) Unix
4 2 (0.86%) Mac OS
4 2 (0.86%) Windows
Processes & Methodologies
1 109 (46.78%) Agile Software Development
2 85 (36.48%) DevOps
3 82 (35.19%) TDD
4 69 (29.61%) Software Engineering
5 51 (21.89%) Continuous Integration
6 41 (17.60%) Front End Development
7 38 (16.31%) Microservices
8 36 (15.45%) Continuous Improvement
9 33 (14.16%) Analytics
9 33 (14.16%) Business Intelligence
10 29 (12.45%) Mentoring
11 27 (11.59%) Scaled Agile Framework
12 25 (10.73%) Test Automation
13 21 (9.01%) OO
14 20 (8.58%) MVC
15 19 (8.15%) Scrum
16 18 (7.73%) Performance Tuning
17 17 (7.30%) Web Development
18 16 (6.87%) Unit Testing
19 13 (5.58%) Information Security
Programming Languages
1 60 (25.75%) TypeScript
2 51 (21.89%) Java
3 44 (18.88%) C#
4 36 (15.45%) PowerShell
5 29 (12.45%) Python
6 24 (10.30%) PHP
7 18 (7.73%) ES6
7 18 (7.73%) Java 8
8 16 (6.87%) Ruby
8 16 (6.87%) SQL
9 15 (6.44%) Go
10 6 (2.58%) C++
10 6 (2.58%) Scala
11 5 (2.15%) Bash Shell
11 5 (2.15%) Kotlin
12 3 (1.29%) C
12 3 (1.29%) PL/SQL
13 2 (0.86%) Apex Code
13 2 (0.86%) Groovy
13 2 (0.86%) Objective-C
Qualifications
1 12 (5.15%) SC Cleared
1 12 (5.15%) Security Cleared
2 7 (3.00%) Degree
3 5 (2.15%) AWS Certification
4 3 (1.29%) Computer Science Degree
5 1 (0.43%) DV Cleared
Quality Assurance & Compliance
1 38 (16.31%) QA
2 2 (0.86%) GDPR
3 1 (0.43%) SLA
System Software
1 44 (18.88%) Docker
2 26 (11.16%) Active Directory
3 3 (1.29%) Ceph
3 3 (1.29%) NFS
4 1 (0.43%) VMware Infrastructure
4 1 (0.43%) vSphere
Systems Management
1 26 (11.16%) Kubernetes
2 9 (3.86%) Terraform
3 6 (2.58%) Ansible
4 3 (1.29%) Hadoop YARN
4 3 (1.29%) Mesos
5 2 (0.86%) Puppet
6 1 (0.43%) Opscode Chef
6 1 (0.43%) Salt
6 1 (0.43%) Single Sign-On
6 1 (0.43%) vRealize
Vendors
1 33 (14.16%) Microsoft
2 12 (5.15%) Oracle
3 8 (3.43%) Salesforce.com
4 5 (2.15%) Google
5 4 (1.72%) MuleSoft
5 4 (1.72%) Nintex
6 3 (1.29%) IBM
7 2 (0.86%) Adobe
7 2 (0.86%) Confluent
7 2 (0.86%) Salesforce Marketing Cloud
8 1 (0.43%) Autodesk
8 1 (0.43%) Cognos
8 1 (0.43%) Dynatrace
8 1 (0.43%) Perfecto Mobile
8 1 (0.43%) Rollbar
8 1 (0.43%) ServiceNow
8 1 (0.43%) Splunk
8 1 (0.43%) Tealium
8 1 (0.43%) VMware
8 1 (0.43%) WorldPay