The following table provides summary statistics for contract job vacancies advertised in Staffordshire 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)
West Midlands / Staffordshire
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 8 24 25
Rank change year-on-year +16 +1  
Contract jobs citing TDD 17 1 2
As % of all contract IT jobs advertised in Staffordshire 14.29% 0.57% 1.11%
As % of the Processes & Methodologies category 19.54% 0.70% 1.36%
Number of daily rates quoted 13 1 2
Median daily rate £335 £310 £358
Median daily rate % change year-on-year +8.06% -13.28%  
90% offered a daily rate of more than £325 £310 £344
10% offered a daily rate of more than £344 £310 £372
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 Staffordshire with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Staffordshire
Contract job vacancies with a requirement for process and methodology skills 87 142 147
As % of all contract IT job vacancies advertised in Staffordshire 73.11% 80.68% 81.67%
Number of daily rates quoted 59 97 93
Median daily rate £335 £325 £360
Median daily rate % change year-on-year +3.07% -9.72%  
90% offered a daily rate of more than £221 £200 £260
10% offered a daily rate of more than £450 £500 £450
UK excluding London median daily rate £415 £400 £383
% change year-on-year +3.75% +4.57%  
Number of hourly rates quoted 4 2 8
Median hourly rate £35.00 £11.23 £16.00
Median hourly rate % change year-on-year +211.73% -29.82%  
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 Staffordshire

The job posting trend of jobs advertised in Staffordshire 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 Staffordshire

TDD
Contractor Daily Rate Trend in Staffordshire

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

Contractor daily rate trend for TDD in Staffordshire

TDD
Contract Job Locations in Staffordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Staffordshire region over the 3 months to 23 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
Stoke-on-Trent - 14 £335 - 1
TDD
West Midlands

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 Staffordshire region with a requirement for TDD.

1 22 (91.67%) C#
1 22 (91.67%) HTML
1 22 (91.67%) SQL Server
2 20 (83.33%) CSS
2 20 (83.33%) .NET
3 16 (66.67%) HTML5
4 14 (58.33%) Agile Software Development
4 14 (58.33%) MySQL
5 12 (50.00%) MVC
6 11 (45.83%) SOLID
7 10 (41.67%) AngularJS
7 10 (41.67%) WPF
7 10 (41.67%) SQL Server 2008
8 9 (37.50%) jQuery
8 9 (37.50%) Microservices
8 9 (37.50%) Line Management
8 9 (37.50%) Mentoring
9 8 (33.33%) Angular 2
10 7 (29.17%) BDD
11 6 (25.00%) TypeScript
11 6 (25.00%) SpecFlow
11 6 (25.00%) Responsive Web Design
11 6 (25.00%) Sass
11 6 (25.00%) Unit Testing
11 6 (25.00%) JavaScript
12 5 (20.83%) Scrum
13 4 (16.67%) SQL
13 4 (16.67%) ASP.NET
13 4 (16.67%) Continuous Integration
13 4 (16.67%) Git (software)

TDD
Co-occurring IT Skills in Staffordshire 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 (8.33%) ColdFusion
Cloud Services
1 2 (8.33%) Google Analytics
Database & Business Intelligence
1 22 (91.67%) SQL Server
2 14 (58.33%) MySQL
3 10 (41.67%) SQL Server 2008
4 1 (4.17%) Amazon Redshift
4 1 (4.17%) PostgreSQL
Development Applications
1 6 (25.00%) SpecFlow
2 4 (16.67%) Git (software)
3 3 (12.50%) NUnit
4 2 (8.33%) Jenkins
4 2 (8.33%) Selenium
4 2 (8.33%) Subversion
4 2 (8.33%) TeamCity
General
1 1 (4.17%) Retail
Job Titles
1 23 (95.83%) Developer
2 17 (70.83%) C# Developer
3 12 (50.00%) Full Stack Developer
3 12 (50.00%) HTML Developer
4 11 (45.83%) HTML CSS Developer
5 9 (37.50%) .NET Developer
6 7 (29.17%) Angular Developer
7 6 (25.00%) C# .NET Developer
7 6 (25.00%) C# WPF Developer
7 6 (25.00%) WPF Developer
8 3 (12.50%) .NET Software Developer
8 3 (12.50%) ASP.NET MVC Developer
8 3 (12.50%) C# Software Developer
8 3 (12.50%) Software Developer
9 2 (8.33%) ASP.NET Developer
9 2 (8.33%) C# ASP.NET Developer
9 2 (8.33%) PHP Developer
9 2 (8.33%) Senior Developer
9 2 (8.33%) Senior PHP Developer
10 1 (4.17%) SQL Developer
Libraries, Frameworks & Software Standards
1 22 (91.67%) HTML
2 20 (83.33%) .NET
2 20 (83.33%) CSS
3 16 (66.67%) HTML5
4 10 (41.67%) AngularJS
4 10 (41.67%) WPF
5 9 (37.50%) jQuery
6 8 (33.33%) Angular 2
7 6 (25.00%) Sass
8 4 (16.67%) ASP.NET
9 3 (12.50%) ASP.NET Web API
9 3 (12.50%) ASP.NET Web Forms
10 2 (8.33%) ASP.NET MVC
10 2 (8.33%) CodeIgniter
10 2 (8.33%) Laravel
10 2 (8.33%) React
10 2 (8.33%) RESTful
10 2 (8.33%) WCF
10 2 (8.33%) XML
Miscellaneous
1 3 (12.50%) Greenfield Project
2 2 (8.33%) User Experience
Processes & Methodologies
1 14 (58.33%) Agile Software Development
2 12 (50.00%) MVC
3 11 (45.83%) SOLID
4 9 (37.50%) Line Management
4 9 (37.50%) Mentoring
4 9 (37.50%) Microservices
5 7 (29.17%) BDD
6 6 (25.00%) Responsive Web Design
6 6 (25.00%) Unit Testing
7 5 (20.83%) Scrum
8 4 (16.67%) Continuous Integration
9 3 (12.50%) Dependency Injection
9 3 (12.50%) Kanban
9 3 (12.50%) OOA/OOD
9 3 (12.50%) Test Automation
10 2 (8.33%) Analytics
10 2 (8.33%) Continuous Delivery
10 2 (8.33%) OO
10 2 (8.33%) SDLC
10 2 (8.33%) SOA
Programming Languages
1 22 (91.67%) C#
2 6 (25.00%) JavaScript
2 6 (25.00%) TypeScript
3 4 (16.67%) SQL
4 2 (8.33%) Java
4 2 (8.33%) PHP
4 2 (8.33%) PowerShell
4 2 (8.33%) T-SQL
5 1 (4.17%) VB.NET
Vendors
1 2 (8.33%) Apple
1 2 (8.33%) Google