The following table provides summary statistics for contract job vacancies advertised in Watford with a requirement for TDD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited TDD over the 3 months to 23 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.

Test-Driven Development (TDD)
Hertfordshire / Watford
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 22 20 21
Rank change year-on-year -2 +1  
Contract jobs citing TDD 5 1 9
As % of all contract IT jobs advertised in Watford 3.11% 0.72% 5.70%
As % of the Processes & Methodologies category 3.60% 1.00% 6.43%
Number of daily rates quoted 3 0 0
Median daily rate £450 - -
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £40.00 £42.50
% change year-on-year +3.75% -5.88%  

TDD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Watford with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Watford
Contract job vacancies with a requirement for process and methodology skills 139 100 140
As % of all contract IT job vacancies advertised in Watford 86.34% 71.94% 88.61%
Number of daily rates quoted 66 50 64
Median daily rate £425 £400 £363
Median daily rate % change year-on-year +6.25% +10.34%  
90% offered a daily rate of more than £263 £293 £275
10% offered a daily rate of more than £525 £500 £475
UK excluding London median daily rate £415 £400 £383
% change year-on-year +3.75% +4.57%  
Number of hourly rates quoted 2 0 4
Median hourly rate £40.00 - £9.00
UK excluding London median hourly rate £33.50 £28.50 £30.00
% change year-on-year +17.54% -5.00%  

TDD
Job Vacancy Trend in Watford

The job posting trend of jobs advertised in Watford citing TDD as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for TDD in Watford

TDD
Contractor Daily Rate Trend in Watford

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

Contractor daily rate trend for TDD in Watford

TDD
Contractor Daily Rate Histogram in Watford

The daily rate distribution of IT jobs citing TDD in Watford over the 3 months to 23 June 2017.

Contractor daily rate histogram for TDD in Watford

For the 6 months to 23 June 2017, IT contractor jobs citing TDD 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 Watford region with a requirement for TDD.

1 5 (83.33%) Agile Software Development
2 4 (66.67%) Java
3 3 (50.00%) JavaScript
3 3 (50.00%) CSS
3 3 (50.00%) Web Services
3 3 (50.00%) Continuous Integration
3 3 (50.00%) Scrum
3 3 (50.00%) BDD
3 3 (50.00%) Git (software)
3 3 (50.00%) HTML
4 2 (33.33%) HTML5
4 2 (33.33%) React
4 2 (33.33%) E-Commerce
4 2 (33.33%) Retail
4 2 (33.33%) Test Automation
4 2 (33.33%) Games
4 2 (33.33%) QA
4 2 (33.33%) XML
4 2 (33.33%) SQL
4 2 (33.33%) J2EE
4 2 (33.33%) Unix
4 2 (33.33%) ETL
5 1 (16.67%) Eclipse
5 1 (16.67%) IntelliJ
5 1 (16.67%) HTTP
5 1 (16.67%) IBM
5 1 (16.67%) Microsoft
5 1 (16.67%) ISEB
5 1 (16.67%) Internet
5 1 (16.67%) HPUX

TDD
Co-occurring IT Skills in Watford 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 1 (16.67%) Apache
1 1 (16.67%) MQSeries
1 1 (16.67%) Tomcat
Cloud Services
1 1 (16.67%) Amazon AWS
Communications & Networking
1 1 (16.67%) HTTP
1 1 (16.67%) Internet
Database & Business Intelligence
1 1 (16.67%) Data Warehouse
1 1 (16.67%) MongoDB
1 1 (16.67%) MySQL
Development Applications
1 3 (50.00%) Git (software)
2 1 (16.67%) Appium
2 1 (16.67%) Cucumber
2 1 (16.67%) Eclipse
2 1 (16.67%) Gatling
2 1 (16.67%) Grunt
2 1 (16.67%) gulp
2 1 (16.67%) IntelliJ
2 1 (16.67%) Jenkins
2 1 (16.67%) JIRA
2 1 (16.67%) JUnit
2 1 (16.67%) Log4j
2 1 (16.67%) Maven
2 1 (16.67%) Mockito
2 1 (16.67%) Selenium
2 1 (16.67%) Subversion
2 1 (16.67%) Talend Open Studio
2 1 (16.67%) Team Foundation Server
2 1 (16.67%) WebDriver
General
1 2 (33.33%) Games
1 2 (33.33%) Retail
2 1 (16.67%) Finance
Job Titles
1 2 (33.33%) Developer
2 1 (16.67%) Automation Tester
2 1 (16.67%) Java Automation Tester
2 1 (16.67%) Java Developer
2 1 (16.67%) JavaScript Developer
2 1 (16.67%) Scrum Master
2 1 (16.67%) Selenium Automation Tester
2 1 (16.67%) Selenium Tester
2 1 (16.67%) Senior Test Engineer
2 1 (16.67%) Technical Leader
2 1 (16.67%) Test Engineer
2 1 (16.67%) Tester
Libraries, Frameworks & Software Standards
1 3 (50.00%) CSS
1 3 (50.00%) HTML
1 3 (50.00%) Web Services
2 2 (33.33%) HTML5
2 2 (33.33%) J2EE
2 2 (33.33%) React
2 2 (33.33%) XML
3 1 (16.67%) AngularJS
3 1 (16.67%) Apache Camel
3 1 (16.67%) CSS3
3 1 (16.67%) D3.js
3 1 (16.67%) Dropwizard
3 1 (16.67%) Hystrix
3 1 (16.67%) KnockoutJS
3 1 (16.67%) Play Framework
3 1 (16.67%) REST
3 1 (16.67%) RESTful
3 1 (16.67%) Scalatra
3 1 (16.67%) Spring Boot
3 1 (16.67%) Vue.js
Miscellaneous
1 1 (16.67%) Analytical Skills
Operating Systems
1 2 (33.33%) Unix
2 1 (16.67%) HPUX
2 1 (16.67%) Linux
2 1 (16.67%) Solaris
Processes & Methodologies
1 5 (83.33%) Agile Software Development
2 3 (50.00%) BDD
2 3 (50.00%) Continuous Integration
2 3 (50.00%) Scrum
3 2 (33.33%) E-Commerce
3 2 (33.33%) ETL
3 2 (33.33%) Test Automation
4 1 (16.67%) Domain-Driven Design
4 1 (16.67%) Kanban
4 1 (16.67%) MVC
4 1 (16.67%) OO
4 1 (16.67%) Pair Programming
4 1 (16.67%) Performance Testing
4 1 (16.67%) RAD
4 1 (16.67%) Refactoring
4 1 (16.67%) SOA
4 1 (16.67%) Software Engineering
4 1 (16.67%) System Testing
4 1 (16.67%) Visualisation
4 1 (16.67%) Web Development
Programming Languages
1 4 (66.67%) Java
2 3 (50.00%) JavaScript
3 2 (33.33%) SQL
4 1 (16.67%) ES6
4 1 (16.67%) Groovy
Qualifications
1 1 (16.67%) ISEB
1 1 (16.67%) ISTQB
1 1 (16.67%) ISTQB Foundation Certification
Quality Assurance & Compliance
1 2 (33.33%) QA
Vendors
1 1 (16.67%) IBM
1 1 (16.67%) Microsoft
1 1 (16.67%) New Relic
1 1 (16.67%) Oracle
1 1 (16.67%) Talend
1 1 (16.67%) Teradata