The following table provides summary statistics for contract job vacancies advertised in Slough with a requirement for JavaScript skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JavaScript over the 3 months to 29 March 2017 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)
Berkshire / Slough
3 months to
29 Mar 2017
Same period 2016 Same period 2015
Rank 13 19 23
Rank change year-on-year +6 +4  
Contract jobs citing JavaScript 7 8 14
As % of all contract IT jobs advertised in Slough 4.86% 3.70% 4.75%
As % of the Programming Languages category 18.92% 22.86% 15.56%
Number of daily rates quoted 6 5 7
Median daily rate £450 £150 £438
Median daily rate % change year-on-year +200.00% -65.71%  
UK excluding London median daily rate £375 £350 £350
% change year-on-year +7.14% -  
Number of hourly rates quoted 0 1 0
Median hourly rate - £175.00 -
UK excluding London median hourly rate £42.50 £38.00 £35.00
% change year-on-year +11.84% +8.57%  

JavaScript is in the programming language skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Slough with a requirement for programming language skills.

Contract Programming Language Skills
Slough
Contract job vacancies with a requirement for programming language skills 37 35 90
As % of all contract IT job vacancies advertised in Slough 25.69% 16.20% 30.51%
Number of daily rates quoted 27 20 44
Median daily rate £425 £305 £350
Median daily rate % change year-on-year +39.34% -12.85%  
90% offered a daily rate of more than £340 £148 £245
10% offered a daily rate of more than £500 £353 £525
UK excluding London median daily rate £388 £375 £350
% change year-on-year +3.33% +7.14%  
Number of hourly rates quoted 1 1 4
Median hourly rate £41.00 £175.00 £32.50
Median hourly rate % change year-on-year -76.57% +438.46%  
UK excluding London median hourly rate £41.50 £40.00 £36.00
% change year-on-year +3.75% +11.11%  

JavaScript
Job Vacancy Trend in Slough

The job posting trend of jobs advertised in Slough citing JavaScript as a proportion of all contract or permanent IT jobs with a match in the Programming Languages category.

Job vacancy trend for JavaScript in Slough

JavaScript
Contractor Daily Rate Trend in Slough

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing JavaScript in Slough.

Contractor daily rate trend for JavaScript in Slough

JavaScript
Contractor Hourly Rate Trend in Slough

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing JavaScript in Slough.

Contractor hourly rate trend for JavaScript in Slough

For the 6 months to 29 March 2017, IT contractor jobs citing JavaScript also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Slough region with a requirement for JavaScript.

1 21 (87.50%) HTML
2 15 (62.50%) CSS
3 14 (58.33%) Agile Software Development
4 12 (50.00%) Subversion
5 9 (37.50%) Front End Development
6 8 (33.33%) User Experience
6 8 (33.33%) Finance
6 8 (33.33%) Web Development
6 8 (33.33%) OO
6 8 (33.33%) E-Commerce
7 7 (29.17%) Linux
7 7 (29.17%) XML
7 7 (29.17%) Java
7 7 (29.17%) PHP
7 7 (29.17%) TDD
7 7 (29.17%) Scrum
7 7 (29.17%) Sass
7 7 (29.17%) AngularJS
7 7 (29.17%) Twitter Bootstrap
7 7 (29.17%) Wireframes
7 7 (29.17%) Unit Testing
7 7 (29.17%) Git (software)
8 6 (25.00%) RESTful
8 6 (25.00%) Scala
8 6 (25.00%) Open Source
8 6 (25.00%) Continuous Integration
8 6 (25.00%) Groovy
8 6 (25.00%) MongoDB
8 6 (25.00%) Software Architecture
8 6 (25.00%) Laravel

JavaScript
Co-occurring IT Skills in Slough 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 6 (25.00%) Tomcat
2 3 (12.50%) Alfresco
2 3 (12.50%) Apache
2 3 (12.50%) Liferay
3 2 (8.33%) CMS
3 2 (8.33%) WordPress
4 1 (4.17%) Elasticsearch
Applications
1 5 (20.83%) Adobe Illustrator
1 5 (20.83%) Photoshop
Cloud Services
1 6 (25.00%) GitHub
Communications & Networking
1 6 (25.00%) LDAP
Database & Business Intelligence
1 6 (25.00%) MongoDB
1 6 (25.00%) MySQL
2 1 (4.17%) SQL Server
2 1 (4.17%) SQL Server 2012
2 1 (4.17%) SQL Server Analysis Services
2 1 (4.17%) SQL Server Integration Services
2 1 (4.17%) SQL Server Reporting Services
Development Applications
1 12 (50.00%) Subversion
2 7 (29.17%) Git (software)
3 6 (25.00%) Gradle
3 6 (25.00%) Jenkins
3 6 (25.00%) JIRA
4 5 (20.83%) Axure RP
5 3 (12.50%) Eclipse
5 3 (12.50%) IntelliJ
6 1 (4.17%) Moq
General
1 8 (33.33%) Finance
2 2 (8.33%) Marketing
Job Titles
1 24 (100.00%) Developer
2 9 (37.50%) Front End Developer (Client-Side Developer)
3 7 (29.17%) Web Developer
4 6 (25.00%) Java Developer
4 6 (25.00%) JavaScript Developer
4 6 (25.00%) UI Developer
5 5 (20.83%) Front End Web Developer (Client-Side Developer)
6 4 (16.67%) HTML CSS Developer
6 4 (16.67%) HTML Developer
6 4 (16.67%) PHP Developer
6 4 (16.67%) PHP Web Developer
7 3 (12.50%) Agile Developer
7 3 (12.50%) Agile Java Developer
8 2 (8.33%) Web UI Developer
8 2 (8.33%) Website Developer
9 1 (4.17%) C# .NET Developer
9 1 (4.17%) C# ASP.NET Developer
9 1 (4.17%) Digital Developer
9 1 (4.17%) E-Commerce Developer
9 1 (4.17%) T-SQL Developer
Libraries, Frameworks & Software Standards
1 21 (87.50%) HTML
2 15 (62.50%) CSS
3 7 (29.17%) AngularJS
3 7 (29.17%) Sass
3 7 (29.17%) Twitter Bootstrap
3 7 (29.17%) XML
4 6 (25.00%) Laravel
4 6 (25.00%) RESTful
4 6 (25.00%) Servlets
4 6 (25.00%) Spring
4 6 (25.00%) Velocity
5 5 (20.83%) Ember.js
5 5 (20.83%) J2EE
6 4 (16.67%) HTML5
7 3 (12.50%) CSS3
7 3 (12.50%) JSR 168
7 3 (12.50%) REST
7 3 (12.50%) Struts
7 3 (12.50%) XHTML
7 3 (12.50%) XSLT
Miscellaneous
1 8 (33.33%) User Experience
2 5 (20.83%) Linux Command Line
3 2 (8.33%) W3C
Operating Systems
1 7 (29.17%) Linux
2 3 (12.50%) Solaris
Processes & Methodologies
1 14 (58.33%) Agile Software Development
2 9 (37.50%) Front End Development
3 8 (33.33%) E-Commerce
3 8 (33.33%) OO
3 8 (33.33%) Web Development
4 7 (29.17%) Scrum
4 7 (29.17%) TDD
4 7 (29.17%) Unit Testing
4 7 (29.17%) Wireframes
5 6 (25.00%) Continuous Integration
5 6 (25.00%) Extreme Programming
5 6 (25.00%) OOD
5 6 (25.00%) Open Source
5 6 (25.00%) Pair Programming
5 6 (25.00%) Software Architecture
5 6 (25.00%) Web Application Development
6 5 (20.83%) Functional Testing
6 5 (20.83%) IT Strategy
6 5 (20.83%) Project Management
6 5 (20.83%) Quality Management
Programming Languages
1 7 (29.17%) Java
1 7 (29.17%) PHP
2 6 (25.00%) Groovy
2 6 (25.00%) Scala
3 1 (4.17%) C#
3 1 (4.17%) PHP 7
3 1 (4.17%) Python
3 1 (4.17%) Ruby
3 1 (4.17%) SQL
3 1 (4.17%) T-SQL
3 1 (4.17%) TypeScript
Qualifications
1 1 (4.17%) Degree
System Software
1 1 (4.17%) Docker
Vendors
1 3 (12.50%) GigaSpaces
2 2 (8.33%) Twitter