Period
to 24 November 2017

The following table provides summary statistics for contract job vacancies advertised in Chester with a requirement for TDD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited TDD over the 6 months to 24 November 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)
Cheshire > Chester
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 21 18 31
Rank change year-on-year -3 +13 -7
Contract jobs citing TDD 8 23 9
As % of all contract IT jobs advertised in Chester 3.85% 7.72% 2.94%
As % of the Processes & Methodologies category 4.76% 9.35% 3.20%
Number of daily rates quoted 8 20 8
Chester median daily rate £375 £395 £375
Median daily rate % change year-on-year -5.06% +5.33% +11.11%
10th Percentile £335 £311 £315
90th Percentile £425 £451 £426
Cheshire median daily rate £400 £388 £375
% change year-on-year +3.23% +3.33% -
Number of hourly rates quoted 0 0 0
Chester median hourly rate - - -
Cheshire median hourly rate - - -

TDD is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Chester with a requirement for process or methodology skills.

All Process and Methodology Skills
Chester
Contract vacancies with a requirement for process or methodology skills 168 246 281
As % of all contract IT jobs advertised in Chester 80.77% 82.55% 91.83%
Number of daily rates quoted 142 219 180
Chester median daily rate £375 £413 £400
Median daily rate % change year-on-year -9.09% +3.13% +12.28%
10th Percentile £257 £236 £305
90th Percentile £505 £515 £525
Cheshire median daily rate £420 £400 £425
% change year-on-year +5.00% -5.88% +9.68%
Number of hourly rates quoted 12 1 20
Chester median hourly rate £13.00 £17.50 £22.50
Median hourly rate % change year-on-year -25.71% -22.22% -18.18%
Cheshire median hourly rate £13.00 £19.06 £17.50
% change year-on-year -31.80% +8.93% -4.19%

TDD
Job Vacancy Trend in Chester

Job postings citing TDD as a percentage of all IT jobs advertised in Chester.

Job vacancy trend for TDD in Chester

TDD
Contractor Daily Rate Trend in Chester

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

Contractor daily rate trend for TDD in Chester

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

1 8 (100.00%) JavaScript
1 8 (100.00%) CSS
1 8 (100.00%) HTML
2 7 (87.50%) React
3 5 (62.50%) Agile Software Development
3 5 (62.50%) Git (software)
3 5 (62.50%) Finance
3 5 (62.50%) Front End Development
3 5 (62.50%) AngularJS
4 4 (50.00%) Twitter Bootstrap
4 4 (50.00%) PHP
5 3 (37.50%) HTML5
5 3 (37.50%) CSS3
5 3 (37.50%) Laravel
5 3 (37.50%) CMS
5 3 (37.50%) gulp
6 2 (25.00%) Re-Platforming
6 2 (25.00%) Java
6 2 (25.00%) jQuery
6 2 (25.00%) Node.js
7 1 (12.50%) Sass
7 1 (12.50%) Domain-Driven Design
7 1 (12.50%) ExpressionEngine
7 1 (12.50%) Unit Testing
7 1 (12.50%) WordPress
7 1 (12.50%) WCF
7 1 (12.50%) CodeIgniter
7 1 (12.50%) C#
7 1 (12.50%) TOGAF
7 1 (12.50%) Enterprise Architecture

TDD
Co-occurring IT Skills in Chester 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 3 (37.50%) CMS
2 1 (12.50%) Apache
2 1 (12.50%) ExpressionEngine
2 1 (12.50%) IIS
2 1 (12.50%) WordPress
Development Applications
1 5 (62.50%) Git (software)
2 3 (37.50%) gulp
3 1 (12.50%) webpack
General
1 5 (62.50%) Finance
Job Titles
1 8 (100.00%) Developer
2 6 (75.00%) JavaScript Developer
3 4 (50.00%) Front End Developer (Client-Side Developer)
3 4 (50.00%) HTML CSS Developer
3 4 (50.00%) HTML Developer
4 3 (37.50%) PHP Developer
5 2 (25.00%) Agile Developer
5 2 (25.00%) Node.js Developer
6 1 (12.50%) .NET Developer
6 1 (12.50%) Full Stack Developer
Libraries, Frameworks & Software Standards
1 8 (100.00%) CSS
1 8 (100.00%) HTML
2 7 (87.50%) React
3 5 (62.50%) AngularJS
4 4 (50.00%) Twitter Bootstrap
5 3 (37.50%) CSS3
5 3 (37.50%) HTML5
5 3 (37.50%) Laravel
6 2 (25.00%) jQuery
6 2 (25.00%) Node.js
7 1 (12.50%) .NET
7 1 (12.50%) ASP.NET Web API
7 1 (12.50%) CodeIgniter
7 1 (12.50%) LAMP
7 1 (12.50%) Sass
7 1 (12.50%) WCF
Miscellaneous
1 1 (12.50%) Greenfield Project
1 1 (12.50%) Linux Command Line
Operating Systems
1 1 (12.50%) Unix
1 1 (12.50%) Windows
Processes & Methodologies
1 5 (62.50%) Agile Software Development
1 5 (62.50%) Front End Development
2 2 (25.00%) Re-Platforming
3 1 (12.50%) Continuous Delivery
3 1 (12.50%) Domain-Driven Design
3 1 (12.50%) Enterprise Architecture
3 1 (12.50%) ITIL
3 1 (12.50%) MVC
3 1 (12.50%) OOP
3 1 (12.50%) Secure Coding
3 1 (12.50%) SOA
3 1 (12.50%) TOGAF
3 1 (12.50%) Unit Testing
Programming Languages
1 8 (100.00%) JavaScript
2 4 (50.00%) PHP
3 2 (25.00%) Java
4 1 (12.50%) C#
4 1 (12.50%) SQL
4 1 (12.50%) T-SQL