The following table provides summary statistics for contract job vacancies advertised in Hertfordshire 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 22 June 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)
East of England / Hertfordshire
3 months to
22 Jun 2017
Same period 2016 Same period 2015
Rank 6 15 10
Rank change year-on-year +9 -5  
Contract jobs citing JavaScript 81 51 89
As % of all contract IT jobs advertised in Hertfordshire 12.82% 7.63% 9.99%
As % of the Programming Languages category 32.02% 28.02% 30.69%
Number of daily rates quoted 57 29 46
Median daily rate £375 £413 £363
Median daily rate % change year-on-year -9.09% +13.79%  
90% offered a daily rate of more than £300 £303 £288
10% offered a daily rate of more than £450 £500 £488
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 1 3 0
Median hourly rate £15.00 £31.50 -
Median hourly rate % change year-on-year -52.38% -  
UK excluding London median hourly rate £43.39 £37.50 £35.00
% change year-on-year +15.70% +7.14%  

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 Hertfordshire with a requirement for programming language skills.

Contract Programming Language Skills
Hertfordshire
Contract job vacancies with a requirement for programming language skills 253 182 290
As % of all contract IT job vacancies advertised in Hertfordshire 40.03% 27.25% 32.55%
Number of daily rates quoted 146 104 132
Median daily rate £388 £400 £350
Median daily rate % change year-on-year -3.12% +14.28%  
90% offered a daily rate of more than £300 £275 £275
10% offered a daily rate of more than £525 £490 £500
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 11 8 15
Median hourly rate £42.50 £43.70 £32.50
Median hourly rate % change year-on-year -2.74% +34.46%  
90% offered a hourly rate of more than £15.00 £15.00 £20.94
10% offered a hourly rate of more than £46.10 £52.50 £41.25
UK excluding London median hourly rate £42.50 £37.00 £36.00
% change year-on-year +14.86% +2.77%  

JavaScript
Job Vacancy Trend in Hertfordshire

The job posting trend of jobs advertised in Hertfordshire 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 Hertfordshire

JavaScript
Contractor Daily Rate Trend in Hertfordshire

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

Contractor daily rate trend for JavaScript in Hertfordshire

JavaScript
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing JavaScript in Hertfordshire over the 3 months to 22 June 2017.

Contractor daily rate histogram for JavaScript in Hertfordshire

JavaScript
Contractor Hourly Rate Trend in Hertfordshire

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

Contractor hourly rate trend for JavaScript in Hertfordshire

JavaScript
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing JavaScript within the Hertfordshire region over the 3 months to 22 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Watford -4 17 £350 -16.41% 17
Hemel Hempstead +13 6 £368 +13.07% 5
Rickmansworth - 5 £255 - 1
Welwyn Garden City +6 4 £475 - 1
Stevenage -2 3 - -
Hatfield - 2 £400 - 1
St Albans +4 1 £300 -20.00% 19
Hertford - 1 £313 - 1
JavaScript
East of England

For the 6 months to 22 June 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 Hertfordshire region with a requirement for JavaScript.

1 89 (69.53%) HTML
2 78 (60.94%) CSS
3 55 (42.97%) .NET
4 50 (39.06%) C#
4 50 (39.06%) jQuery
5 46 (35.94%) Java
6 44 (34.38%) HTML5
6 44 (34.38%) AngularJS
7 41 (32.03%) SQL
8 38 (29.69%) Web Services
9 37 (28.91%) XML
10 36 (28.13%) ASP.NET
11 33 (25.78%) SQL Server
11 33 (25.78%) Agile Software Development
12 32 (25.00%) JSON
13 31 (24.22%) RESTful
13 31 (24.22%) MVC
13 31 (24.22%) CSS3
14 29 (22.66%) Git (software)
15 23 (17.97%) Web Development
15 23 (17.97%) Twitter Bootstrap
16 21 (16.41%) Sass
16 21 (16.41%) Front End Development
17 19 (14.84%) REST
18 18 (14.06%) Node.js
18 18 (14.06%) KnockoutJS
19 17 (13.28%) T-SQL
19 17 (13.28%) MongoDB
20 16 (12.50%) ASP.NET Web API
20 16 (12.50%) XSLT

JavaScript
Co-occurring IT Skills in Hertfordshire 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 12 (9.38%) WebSphere
2 9 (7.03%) CMS
2 9 (7.03%) IIS
3 8 (6.25%) Elasticsearch
3 8 (6.25%) SharePoint
4 6 (4.69%) WebLogic
4 6 (4.69%) WebLogic Portal
5 3 (2.34%) Magnolia
6 2 (1.56%) nginx
6 2 (1.56%) Tomcat
6 2 (1.56%) WebSphere Application Server
7 1 (0.78%) Apache
7 1 (0.78%) EPiServer
7 1 (0.78%) Sitecore CMS
7 1 (0.78%) Umbraco
7 1 (0.78%) WordPress
Applications
1 3 (2.34%) Photoshop
2 1 (0.78%) Microsoft Excel
Business Applications
1 10 (7.81%) Dynamics CRM
2 5 (3.91%) SAP HCM
3 1 (0.78%) Magento
3 1 (0.78%) Payment Gateway
Cloud Services
1 8 (6.25%) Amazon AWS
2 5 (3.91%) Boomi
2 5 (3.91%) SuccessFactors
3 4 (3.13%) Amazon S3
3 4 (3.13%) AWS Lambda
4 3 (2.34%) AWS CloudFormation
5 2 (1.56%) Amazon EC2
5 2 (1.56%) Amazon SQS
6 1 (0.78%) Dynamics 365
6 1 (0.78%) GitHub
6 1 (0.78%) Microsoft Azure
6 1 (0.78%) PaaS
6 1 (0.78%) Route 53
Communications & Networking
1 5 (3.91%) HTTP
2 4 (3.13%) VoIP
2 4 (3.13%) Wireshark
3 3 (2.34%) Internet
3 3 (2.34%) TCP/IP
4 2 (1.56%) DNS
4 2 (1.56%) Ethernet
4 2 (1.56%) HTTPS
4 2 (1.56%) IMAP
4 2 (1.56%) SMTP
5 1 (0.78%) Firewall
5 1 (0.78%) SSL
Database & Business Intelligence
1 33 (25.78%) SQL Server
2 17 (13.28%) MongoDB
3 11 (8.59%) MySQL
4 10 (7.81%) Sybase ASE
5 7 (5.47%) Crystal Reports
5 7 (5.47%) PostgreSQL
5 7 (5.47%) SQL Server Reporting Services
6 5 (3.91%) Amazon DynamoDB
6 5 (3.91%) SQL Server 2012
7 4 (3.13%) Relational Database
7 4 (3.13%) SQL Server 2008
7 4 (3.13%) SQL Server 2014
8 3 (2.34%) NoSQL
8 3 (2.34%) QlikView
9 2 (1.56%) Oracle Database
10 1 (0.78%) Amazon RDS
10 1 (0.78%) BusinessObjects
10 1 (0.78%) DbVisualizer
10 1 (0.78%) Redis
10 1 (0.78%) SAP Data Services
Development Applications
1 29 (22.66%) Git (software)
2 15 (11.72%) Subversion
2 15 (11.72%) Visual Studio
3 12 (9.38%) Team Foundation Server
4 11 (8.59%) gulp
5 9 (7.03%) JIRA
6 8 (6.25%) Grunt
6 8 (6.25%) Jenkins
7 6 (4.69%) PHPUnit
7 6 (4.69%) webpack
8 4 (3.13%) Selenium
9 3 (2.34%) Mocha
9 3 (2.34%) Octopus Deploy
9 3 (2.34%) Visual Studio Team System
9 3 (2.34%) Xcode
10 2 (1.56%) Cucumber
10 2 (1.56%) FxCop
10 2 (1.56%) Moq
10 2 (1.56%) SpecFlow
10 2 (1.56%) StyleCop
General
1 13 (10.16%) Finance
2 9 (7.03%) Retail
3 4 (3.13%) Interactive Media
4 3 (2.34%) Law
5 2 (1.56%) Aerospace
5 2 (1.56%) Automotive
5 2 (1.56%) Military
6 1 (0.78%) Back Office
6 1 (0.78%) Games
6 1 (0.78%) Marketing
6 1 (0.78%) Multimedia
6 1 (0.78%) Publishing
Job Titles
1 117 (91.41%) Developer
2 30 (23.44%) .NET Developer
3 18 (14.06%) Java Developer
4 17 (13.28%) JavaScript Developer
5 16 (12.50%) C# Developer
5 16 (12.50%) Front End Developer (Client-Side Developer)
6 15 (11.72%) Web Developer
7 12 (9.38%) ASP.NET Developer
8 10 (7.81%) C# .NET Developer
8 10 (7.81%) Full Stack Developer
9 9 (7.03%) PHP Developer
10 7 (5.47%) WebSphere Developer
11 6 (4.69%) Node.js Developer
11 6 (4.69%) PHP Symfony Developer
11 6 (4.69%) Symfony Developer
12 5 (3.91%) AWS Developer
12 5 (3.91%) CRM Developer
12 5 (3.91%) Dynamics CRM Developer
12 5 (3.91%) Integration Developer
12 5 (3.91%) iOS Developer
Libraries, Frameworks & Software Standards
1 89 (69.53%) HTML
2 78 (60.94%) CSS
3 55 (42.97%) .NET
4 50 (39.06%) jQuery
5 44 (34.38%) AngularJS
5 44 (34.38%) HTML5
6 38 (29.69%) Web Services
7 37 (28.91%) XML
8 36 (28.13%) ASP.NET
9 32 (25.00%) JSON
10 31 (24.22%) CSS3
10 31 (24.22%) RESTful
11 23 (17.97%) Twitter Bootstrap
12 21 (16.41%) Sass
13 19 (14.84%) REST
14 18 (14.06%) KnockoutJS
14 18 (14.06%) Node.js
15 16 (12.50%) ASP.NET Web API
15 16 (12.50%) XSLT
16 15 (11.72%) WCF
Miscellaneous
1 8 (6.25%) DataPower
1 8 (6.25%) Mobile App
1 8 (6.25%) User Experience
2 7 (5.47%) Greenfield Project
3 5 (3.91%) Analytical Skills
3 5 (3.91%) NHS
3 5 (3.91%) W3C
4 2 (1.56%) iPad
4 2 (1.56%) Tandem
5 1 (0.78%) Computer Science
5 1 (0.78%) Digital Media
5 1 (0.78%) Management Information System
5 1 (0.78%) Social Media
Operating Systems
1 16 (12.50%) Windows
2 12 (9.38%) Linux
3 11 (8.59%) Android
4 6 (4.69%) Apple iOS
5 5 (3.91%) Windows Server
6 3 (2.34%) Unix
Processes & Methodologies
1 33 (25.78%) Agile Software Development
2 31 (24.22%) MVC
3 23 (17.97%) Web Development
4 21 (16.41%) Front End Development
5 15 (11.72%) TDD
6 13 (10.16%) OO
7 11 (8.59%) API Development
7 11 (8.59%) BDD
7 11 (8.59%) Continuous Integration
7 11 (8.59%) E-Commerce
7 11 (8.59%) Scrum
8 10 (7.81%) CRM
9 7 (5.47%) Unit Testing
9 7 (5.47%) Wireframes
10 6 (4.69%) Business Intelligence
10 6 (4.69%) Digital Transformation Programme
10 6 (4.69%) Microservices
10 6 (4.69%) Open Source
10 6 (4.69%) Web Design
11 5 (3.91%) DevOps
Programming Languages
1 50 (39.06%) C#
2 46 (35.94%) Java
3 41 (32.03%) SQL
4 17 (13.28%) T-SQL
5 10 (7.81%) PHP
6 7 (5.47%) C
6 7 (5.47%) Python
7 6 (4.69%) PHP 5
7 6 (4.69%) PHP 7
7 6 (4.69%) XPath
8 5 (3.91%) ES6
8 5 (3.91%) Objective-C
8 5 (3.91%) VBScript
9 4 (3.13%) VB.NET
10 3 (2.34%) C++
10 3 (2.34%) PL/SQL
10 3 (2.34%) PowerShell
11 1 (0.78%) Apex Code
11 1 (0.78%) Groovy
11 1 (0.78%) Ruby
Qualifications
1 3 (2.34%) Degree
2 2 (1.56%) Security Cleared
3 1 (0.78%) ISEB
3 1 (0.78%) ISTQB
3 1 (0.78%) ISTQB Foundation Certification
3 1 (0.78%) SC Cleared
Quality Assurance & Compliance
1 9 (7.03%) QA
2 3 (2.34%) WAI
3 1 (0.78%) Sarbanes-Oxley
3 1 (0.78%) SLA
System Software
1 2 (1.56%) Docker
2 1 (0.78%) Virtual Desktop
Systems Management
1 8 (6.25%) WebSphere Cast Iron
2 3 (2.34%) TeamSite
3 2 (1.56%) Opscode Chef
4 1 (0.78%) Data Guard
4 1 (0.78%) Symantec Endpoint Protection
4 1 (0.78%) ThinApp
Vendors
1 16 (12.50%) Microsoft
2 11 (8.59%) IBM
3 10 (7.81%) Oracle
3 10 (7.81%) Sybase
4 7 (5.47%) SAP
5 6 (4.69%) Google
6 5 (3.91%) Dell
7 4 (3.13%) Telerik
8 2 (1.56%) Apple
8 2 (1.56%) Atlassian
8 2 (1.56%) VMware
8 2 (1.56%) Zend
9 1 (0.78%) EMC
9 1 (0.78%) hybris
9 1 (0.78%) Intel
9 1 (0.78%) McAfee
9 1 (0.78%) Salesforce.com
9 1 (0.78%) Serena
9 1 (0.78%) Sitecore
9 1 (0.78%) Symantec
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