The following table provides summary statistics for contract job vacancies advertised in Gatwick 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 24 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)
West Sussex / Gatwick
3 months to
24 Jun 2017
Same period 2016 Same period 2015
Rank - 14 16
Contract jobs citing TDD 0 3 2
As % of all contract IT jobs advertised in Gatwick - 4.00% 3.33%
As % of the Processes & Methodologies category - 4.17% 3.64%
Number of daily rates quoted 0 3 0
Median daily rate - £365 -
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 2
Median hourly rate - - £50.00
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 Gatwick with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Gatwick
Contract job vacancies with a requirement for process and methodology skills 53 72 55
As % of all contract IT job vacancies advertised in Gatwick 96.36% 96.00% 91.67%
Number of daily rates quoted 27 56 38
Median daily rate £383 £375 £343
Median daily rate % change year-on-year +2.00% +9.48%  
90% offered a daily rate of more than £250 £335 £300
10% offered a daily rate of more than £496 £500 £471
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 2 9 4
Median hourly rate £57.00 £51.50 £50.00
Median hourly rate % change year-on-year +10.67% +3.00%  
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in Gatwick

The job posting trend of jobs advertised in Gatwick 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 Gatwick

TDD
Contractor Daily Rate Trend in Gatwick

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

Contractor daily rate trend for TDD in Gatwick

For the 6 months to 24 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 Gatwick region with a requirement for TDD.

1 2 (100.00%) C#
1 2 (100.00%) HTML
1 2 (100.00%) SQL
1 2 (100.00%) .NET
1 2 (100.00%) SQL Server
1 2 (100.00%) IIS
1 2 (100.00%) CSS
1 2 (100.00%) Web Services
1 2 (100.00%) Windows
1 2 (100.00%) E-Commerce
1 2 (100.00%) MVC
1 2 (100.00%) CMS
1 2 (100.00%) .NET Framework
1 2 (100.00%) ReSharper
1 2 (100.00%) LINQ
1 2 (100.00%) Sitecore CMS
1 2 (100.00%) Sitecore
1 2 (100.00%) OWASP
1 2 (100.00%) Git (software)
1 2 (100.00%) Software Architecture
1 2 (100.00%) MVVM
1 2 (100.00%) Backbone.js
1 2 (100.00%) KnockoutJS
1 2 (100.00%) SQL Server 2012
1 2 (100.00%) AngularJS
1 2 (100.00%) Windows Server
1 2 (100.00%) Prototyping

TDD
Co-occurring IT Skills in Gatwick 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 2 (100.00%) CMS
1 2 (100.00%) IIS
1 2 (100.00%) Sitecore CMS
Database & Business Intelligence
1 2 (100.00%) SQL Server
1 2 (100.00%) SQL Server 2012
Development Applications
1 2 (100.00%) Git (software)
1 2 (100.00%) ReSharper
Job Titles
1 2 (100.00%) .NET Developer
1 2 (100.00%) C# .NET Developer
1 2 (100.00%) C# Developer
1 2 (100.00%) Developer
1 2 (100.00%) SQL Developer
Libraries, Frameworks & Software Standards
1 2 (100.00%) .NET
1 2 (100.00%) .NET Framework
1 2 (100.00%) AngularJS
1 2 (100.00%) Backbone.js
1 2 (100.00%) CSS
1 2 (100.00%) HTML
1 2 (100.00%) KnockoutJS
1 2 (100.00%) LINQ
1 2 (100.00%) Web Services
Operating Systems
1 2 (100.00%) Windows
1 2 (100.00%) Windows Server
Processes & Methodologies
1 2 (100.00%) E-Commerce
1 2 (100.00%) MVC
1 2 (100.00%) MVVM
1 2 (100.00%) OWASP
1 2 (100.00%) Prototyping
1 2 (100.00%) Software Architecture
Programming Languages
1 2 (100.00%) C#
1 2 (100.00%) SQL
Vendors
1 2 (100.00%) Sitecore