The following table provides summary statistics for contract job vacancies advertised in Kent 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 26 April 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)
South East / Kent
3 months to
26 Apr 2017
Same period 2016 Same period 2015
Rank 26 11 29
Rank change year-on-year -15 +18  
Contract jobs citing TDD 19 56 9
As % of all contract IT jobs advertised in Kent 6.33% 11.74% 3.45%
As % of the Processes & Methodologies category 7.31% 15.47% 4.95%
Number of daily rates quoted 17 51 8
Median daily rate £343 £338 £325
Median daily rate % change year-on-year +1.48% +3.84%  
90% offered a daily rate of more than £315 £330 £314
10% offered a daily rate of more than £400 £750 £344
UK excluding London median daily rate £400 £400 £375
% change year-on-year - +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £44.00 £42.50
% change year-on-year -5.68% +3.52%  

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 Kent with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Kent
Contract job vacancies with a requirement for process and methodology skills 260 362 182
As % of all contract IT job vacancies advertised in Kent 86.67% 75.89% 69.73%
Number of daily rates quoted 186 280 91
Median daily rate £375 £350 £350
Median daily rate % change year-on-year +7.14% -  
90% offered a daily rate of more than £203 £210 £288
10% offered a daily rate of more than £525 £600 £500
UK excluding London median daily rate £415 £400 £390
% change year-on-year +3.75% +2.56%  
Number of hourly rates quoted 14 6 10
Median hourly rate £27.38 £170.00 £37.62
Median hourly rate % change year-on-year -83.89% +351.88%  
90% offered a hourly rate of more than £22.52 £15.25 £11.50
10% offered a hourly rate of more than £29.92 £170.00 £40.00
UK excluding London median hourly rate £37.00 £36.00 £30.75
% change year-on-year +2.77% +17.07%  

TDD
Job Vacancy Trend in Kent

The job posting trend of jobs advertised in Kent 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 Kent

TDD
Contractor Daily Rate Trend in Kent

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

Contractor daily rate trend for TDD in Kent

TDD
Contractor Daily Rate Histogram in Kent

The daily rate distribution of IT jobs citing TDD in Kent over the 3 months to 26 April 2017.

Contractor daily rate histogram for TDD in Kent

TDD
Contract Job Locations in Kent

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Kent region over the 3 months to 26 April 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
West Malling +1 7 £345 -8.12%
Maidstone -5 2 £340 -9.33%
Folkestone - 2 £325 - 1
TDD
South East

For the 6 months to 26 April 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 Kent region with a requirement for TDD.

1 46 (88.46%) C#
1 46 (88.46%) .NET
2 44 (84.62%) LINQ
3 41 (78.85%) .NET Framework
3 41 (78.85%) Web Services
4 39 (75.00%) SQL
5 38 (73.08%) JSON
6 37 (71.15%) XML
6 37 (71.15%) Multithreading
6 37 (71.15%) Team Foundation Server
6 37 (71.15%) Entity Framework
6 37 (71.15%) Concurrent Programming
6 37 (71.15%) Multithreaded Programming
7 36 (69.23%) LINQ to SQL
8 30 (57.69%) Algorithms
9 26 (50.00%) Data Management
10 14 (26.92%) SQL Server
11 13 (25.00%) MVC
12 11 (21.15%) HTML
13 10 (19.23%) Agile Software Development
14 9 (17.31%) JavaScript
15 8 (15.38%) CSS
16 7 (13.46%) MVVM
17 6 (11.54%) Oracle
17 6 (11.54%) DB2
18 5 (9.62%) Finance
18 5 (9.62%) Scrum
18 5 (9.62%) Git (software)
18 5 (9.62%) AngularJS
19 4 (7.69%) ASP.NET Web API

TDD
Co-occurring IT Skills in Kent 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 4 (7.69%) CMS
1 4 (7.69%) IIS
1 4 (7.69%) Sitecore CMS
2 1 (1.92%) Apache
2 1 (1.92%) Confluence
2 1 (1.92%) GlassFish
2 1 (1.92%) JBoss
2 1 (1.92%) Tomcat
Business Applications
1 1 (1.92%) Dynamics AX
Communications & Networking
1 1 (1.92%) HTTP
1 1 (1.92%) Intranet
Database & Business Intelligence
1 14 (26.92%) SQL Server
2 6 (11.54%) DB2
3 4 (7.69%) SQL Server 2012
4 3 (5.77%) Oracle Database
4 3 (5.77%) Oracle Database 11g
4 3 (5.77%) Oracle Database 12c
5 2 (3.85%) MySQL
5 2 (3.85%) NoSQL
Development Applications
1 37 (71.15%) Team Foundation Server
2 5 (9.62%) Git (software)
3 4 (7.69%) JIRA
3 4 (7.69%) jMock
3 4 (7.69%) JUnit
3 4 (7.69%) Maven
3 4 (7.69%) Mockito
3 4 (7.69%) ReSharper
4 3 (5.77%) Subversion
5 1 (1.92%) IntelliJ
5 1 (1.92%) Jenkins
5 1 (1.92%) JIRA Agile
General
1 5 (9.62%) Finance
2 2 (3.85%) Advertising
Job Titles
1 51 (98.08%) Developer
2 45 (86.54%) .NET Developer
3 32 (61.54%) C# .NET Developer
3 32 (61.54%) C# Developer
4 7 (13.46%) SQL Developer
5 5 (9.62%) XML Developer
6 4 (7.69%) Java Developer
7 3 (5.77%) Applications Developer
7 3 (5.77%) C# WPF Developer
7 3 (5.77%) J2EE Applications Developer
7 3 (5.77%) J2EE Developer
7 3 (5.77%) Java Applications Developer
7 3 (5.77%) Java/J2EE Developer
7 3 (5.77%) Lead Developer
7 3 (5.77%) Lead Java Developer
7 3 (5.77%) WPF Developer
8 2 (3.85%) PHP Developer
8 2 (3.85%) PHP Laravel Developer
9 1 (1.92%) Contracts Manager
9 1 (1.92%) Senior C# Developer
Libraries, Frameworks & Software Standards
1 46 (88.46%) .NET
2 44 (84.62%) LINQ
3 41 (78.85%) .NET Framework
3 41 (78.85%) Web Services
4 38 (73.08%) JSON
5 37 (71.15%) Entity Framework
5 37 (71.15%) XML
6 36 (69.23%) LINQ to SQL
7 11 (21.15%) HTML
8 8 (15.38%) CSS
9 5 (9.62%) AngularJS
10 4 (7.69%) ASP.NET Web API
10 4 (7.69%) Backbone.js
10 4 (7.69%) Hibernate
10 4 (7.69%) J2EE
10 4 (7.69%) KnockoutJS
10 4 (7.69%) Spring
10 4 (7.69%) Spring MVC
11 3 (5.77%) Middleware
11 3 (5.77%) WCF
Miscellaneous
1 30 (57.69%) Algorithms
2 3 (5.77%) Computer Science
2 3 (5.77%) Enterprise Software
3 1 (1.92%) Greenfield Project
Operating Systems
1 4 (7.69%) Windows
1 4 (7.69%) Windows Server
Processes & Methodologies
1 37 (71.15%) Concurrent Programming
1 37 (71.15%) Multithreaded Programming
1 37 (71.15%) Multithreading
2 26 (50.00%) Data Management
3 13 (25.00%) MVC
4 10 (19.23%) Agile Software Development
5 7 (13.46%) MVVM
6 5 (9.62%) Scrum
7 4 (7.69%) E-Commerce
7 4 (7.69%) OWASP
7 4 (7.69%) Prototyping
7 4 (7.69%) Software Architecture
8 3 (5.77%) BDD
8 3 (5.77%) Build Automation
8 3 (5.77%) Continuous Integration
8 3 (5.77%) OO
8 3 (5.77%) UML
8 3 (5.77%) Web Development
9 2 (3.85%) Front End Development
10 1 (1.92%) SDLC
Programming Languages
1 46 (88.46%) C#
2 39 (75.00%) SQL
3 9 (17.31%) JavaScript
4 4 (7.69%) Java
5 3 (5.77%) PHP
6 1 (1.92%) LINC
Qualifications
1 3 (5.77%) Degree
Vendors
1 6 (11.54%) Oracle
2 4 (7.69%) Sitecore
3 2 (3.85%) Microsoft