Period
to 20 November 2017

The following table provides summary statistics for contract job vacancies advertised in Cardiff 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 20 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)
South Wales > Cardiff
6 months to
20 Nov 2017
Same period 2016 Same period 2015
Rank 30 23 21
Rank change year-on-year -7 -2 +5
Contract jobs citing TDD 30 34 78
As % of all contract IT jobs advertised in Cardiff 4.91% 6.24% 8.92%
As % of the Processes & Methodologies category 5.67% 7.49% 10.96%
Number of daily rates quoted 23 33 59
Cardiff median daily rate £425 £475 £323
Median daily rate % change year-on-year -10.53% +47.29% -24.12%
10th Percentile £326 £335 £287
90th Percentile £480 £585 £439
South Wales median daily rate £425 £475 £390
% change year-on-year -10.53% +21.79% -2.50%
Number of hourly rates quoted 0 0 1
Cardiff median hourly rate - - £21.00
South Wales median hourly rate - - £43.50

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 Cardiff with a requirement for process or methodology skills.

All Process and Methodology Skills
Cardiff
Contract vacancies with a requirement for process or methodology skills 529 454 712
As % of all contract IT jobs advertised in Cardiff 86.58% 83.30% 81.46%
Number of daily rates quoted 368 367 593
Cardiff median daily rate £375 £375 £350
Median daily rate % change year-on-year - +7.14% -
10th Percentile £175 £187 £221
90th Percentile £500 £525 £462
South Wales median daily rate £375 £400 £350
% change year-on-year -6.25% +14.29% -
Number of hourly rates quoted 19 16 14
Cardiff median hourly rate £17.50 £14.25 £14.88
Median hourly rate % change year-on-year +22.81% -4.20% +35.23%
10th Percentile £13.00 £10.75 £10.05
90th Percentile £35.45 £37.13 £21.05
South Wales median hourly rate £19.00 £18.75 £15.88
% change year-on-year +1.33% +18.11% +11.40%

TDD
Job Vacancy Trend in Cardiff

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

Job vacancy trend for TDD in Cardiff

TDD
Contractor Daily Rate Trend in Cardiff

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

Contractor daily rate trend for TDD in Cardiff

TDD
Contractor Daily Rate Histogram in Cardiff

The daily rate distribution of IT jobs citing TDD in Cardiff over the 6 months to 20 November 2017.

Contractor daily rate histogram for TDD in Cardiff

For the 6 months to 20 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 Cardiff region with a requirement for TDD.

1 21 (70.00%) Agile Software Development
2 20 (66.67%) Test Automation
3 18 (60.00%) JavaScript
4 17 (56.67%) HTML
4 17 (56.67%) CSS
4 17 (56.67%) HTML5
5 16 (53.33%) BDD
5 16 (53.33%) CSS3
6 15 (50.00%) Node.js
6 15 (50.00%) Scrum
6 15 (50.00%) JSON
7 14 (46.67%) Ajax
7 14 (46.67%) Git (software)
8 13 (43.33%) Unit Testing
9 12 (40.00%) Finance
9 12 (40.00%) Responsive Web Design
9 12 (40.00%) Grunt
9 12 (40.00%) gulp
10 11 (36.67%) SonarQube
10 11 (36.67%) npm
11 10 (33.33%) Performance Optimisation
11 10 (33.33%) Perforce
12 9 (30.00%) React
13 8 (26.67%) Continuous Integration
14 7 (23.33%) Banking
14 7 (23.33%) Java
14 7 (23.33%) OO
15 6 (20.00%) Front End Development
16 5 (16.67%) Cucumber
16 5 (16.67%) AngularJS

TDD
Co-occurring IT Skills in Cardiff 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 1 (3.33%) IIS
Cloud Services
1 11 (36.67%) npm
2 1 (3.33%) Amazon AWS
2 1 (3.33%) Amazon CloudWatch
2 1 (3.33%) Amazon EC2
Communications & Networking
1 1 (3.33%) SMS
Database & Business Intelligence
1 4 (13.33%) SQL Server
2 3 (10.00%) RDBMS
2 3 (10.00%) Relational Database
3 1 (3.33%) Amazon DynamoDB
3 1 (3.33%) PostgreSQL
3 1 (3.33%) SQL Server 2012
Development Applications
1 14 (46.67%) Git (software)
2 12 (40.00%) Grunt
2 12 (40.00%) gulp
3 11 (36.67%) SonarQube
4 5 (16.67%) Cucumber
5 3 (10.00%) Eclipse
5 3 (10.00%) Gradle
5 3 (10.00%) JProfiler
5 3 (10.00%) JUnit
6 2 (6.67%) Jenkins
6 2 (6.67%) NUnit
6 2 (6.67%) Selenium
6 2 (6.67%) webpack
7 1 (3.33%) JIRA
7 1 (3.33%) Subversion
7 1 (3.33%) Visual Studio
7 1 (3.33%) Xcode
General
1 12 (40.00%) Finance
2 7 (23.33%) Banking
3 2 (6.67%) Retail
4 1 (3.33%) Retail Banking
4 1 (3.33%) Telecoms
Job Titles
1 22 (73.33%) Developer
2 9 (30.00%) UI Developer
3 6 (20.00%) Front End Developer (Client-Side Developer)
4 4 (13.33%) Full Stack Developer
4 4 (13.33%) JavaScript Developer
5 3 (10.00%) .NET Developer
5 3 (10.00%) Scrum Master
6 2 (6.67%) Android Developer
6 2 (6.67%) C# .NET Developer
6 2 (6.67%) C# Developer
6 2 (6.67%) HTML CSS Developer
6 2 (6.67%) HTML Developer
6 2 (6.67%) Java Developer
6 2 (6.67%) Senior Developer
7 1 (3.33%) Analyst
7 1 (3.33%) ASP.NET Developer
7 1 (3.33%) Banking Analyst
7 1 (3.33%) Banking Business Analyst
7 1 (3.33%) UI Designer
7 1 (3.33%) Web Developer
Libraries, Frameworks & Software Standards
1 17 (56.67%) CSS
1 17 (56.67%) HTML
1 17 (56.67%) HTML5
2 16 (53.33%) CSS3
3 15 (50.00%) JSON
3 15 (50.00%) Node.js
4 14 (46.67%) Ajax
5 9 (30.00%) React
6 5 (16.67%) AngularJS
7 4 (13.33%) XML
8 3 (10.00%) .NET
8 3 (10.00%) Angular 2
8 3 (10.00%) ASP.NET Web API
8 3 (10.00%) Hibernate
8 3 (10.00%) J2EE
8 3 (10.00%) JPA
8 3 (10.00%) jQuery
8 3 (10.00%) REST
8 3 (10.00%) Spring
8 3 (10.00%) XSLT
Miscellaneous
1 2 (6.67%) Computer Science
1 2 (6.67%) User Experience
2 1 (3.33%) Analytical Skills
2 1 (3.33%) Greenfield Project
Operating Systems
1 2 (6.67%) Android
2 1 (3.33%) Apple iOS
Processes & Methodologies
1 21 (70.00%) Agile Software Development
2 20 (66.67%) Test Automation
3 16 (53.33%) BDD
4 15 (50.00%) Scrum
5 13 (43.33%) Unit Testing
6 12 (40.00%) Responsive Web Design
7 10 (33.33%) Performance Optimisation
8 8 (26.67%) Continuous Integration
9 7 (23.33%) OO
10 6 (20.00%) Front End Development
11 4 (13.33%) Data Protection
11 4 (13.33%) Mobile Development
11 4 (13.33%) Software Delivery
12 3 (10.00%) Data Modelling
12 3 (10.00%) Domain-Driven Design
12 3 (10.00%) E-Commerce
12 3 (10.00%) RAD
12 3 (10.00%) SDLC
13 2 (6.67%) API Design
13 2 (6.67%) Software Engineering
Programming Languages
1 18 (60.00%) JavaScript
2 7 (23.33%) Java
3 4 (13.33%) SQL
4 3 (10.00%) C#
5 2 (6.67%) ES6
6 1 (3.33%) Apple Swift
6 1 (3.33%) Kotlin
6 1 (3.33%) Objective-C
Qualifications
1 1 (3.33%) Computer Science Degree
1 1 (3.33%) Degree
1 1 (3.33%) SC Cleared
1 1 (3.33%) Security Cleared
Quality Assurance & Compliance
1 1 (3.33%) QA
1 1 (3.33%) WCAG
Systems Management
1 1 (3.33%) Business Desktop Deployment
Vendors
1 10 (33.33%) Perforce
2 3 (10.00%) Oracle
3 1 (3.33%) Apple