The following table provides summary statistics for contract job vacancies advertised in Halifax 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 27 March 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 Yorkshire / Halifax
3 months to
27 Mar 2017
Same period 2016 Same period 2015
Rank - 17 -
Contract jobs citing TDD 0 4 0
As % of all contract IT jobs advertised in Halifax - 4.30% -
As % of the Processes & Methodologies category - 5.56% -
Number of daily rates quoted 0 4 0
Median daily rate - £325 -
UK excluding London median daily rate £402 £400 £375
% change year-on-year +0.56% +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £39.00 £45.75 £36.00
% change year-on-year -14.75% +27.08%  

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 Halifax with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Halifax
Contract job vacancies with a requirement for process and methodology skills 64 72 144
As % of all contract IT job vacancies advertised in Halifax 86.49% 77.42% 84.21%
Number of daily rates quoted 52 61 114
Median daily rate £405 £383 £396
Median daily rate % change year-on-year +5.88% -3.40%  
90% offered a daily rate of more than £295 £305 £285
10% offered a daily rate of more than £510 £500 £475
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 0 1 4
Median hourly rate - £9.00 £40.00
Median hourly rate % change year-on-year - -77.50%  
UK excluding London median hourly rate £36.25 £38.50 £30.20
% change year-on-year -5.84% +27.48%  

TDD
Job Vacancy Trend in Halifax

The job posting trend of jobs advertised in Halifax 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 Halifax

TDD
Contractor Daily Rate Trend in Halifax

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

Contractor daily rate trend for TDD in Halifax

TDD
Top 10 Co-occurring IT Skills in Halifax

For the 6 months to 27 March 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 Halifax region with a requirement for TDD.

1 2 (100.00%) SQL
1 2 (100.00%) .NET
1 2 (100.00%) C#
1 2 (100.00%) Agile Software Development
1 2 (100.00%) BDD
2 1 (50.00%) MVC
2 1 (50.00%) HTML
2 1 (50.00%) JavaScript
2 1 (50.00%) CSS
2 1 (50.00%) Microsoft

TDD
Co-occurring IT Skills in Halifax 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:

Job Titles
1 2 (100.00%) .NET Developer
1 2 (100.00%) Developer
2 1 (50.00%) Microsoft Developer
Libraries, Frameworks & Software Standards
1 2 (100.00%) .NET
2 1 (50.00%) CSS
2 1 (50.00%) HTML
Processes & Methodologies
1 2 (100.00%) Agile Software Development
1 2 (100.00%) BDD
2 1 (50.00%) MVC
Programming Languages
1 2 (100.00%) C#
1 2 (100.00%) SQL
2 1 (50.00%) JavaScript
Vendors
1 1 (50.00%) Microsoft