The following table provides summary statistics for contract job vacancies advertised in South Wales 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 30 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)
Wales / South Wales
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 32 10 38
Rank change year-on-year -22 +28  
Contract jobs citing TDD 23 93 12
As % of all contract IT jobs advertised in South Wales 4.02% 16.97% 2.67%
As % of the Processes & Methodologies category 4.86% 19.91% 3.46%
Number of daily rates quoted 15 69 8
Median daily rate £450 £375 £331
Median daily rate % change year-on-year +20.00% +13.20%  
90% offered a daily rate of more than £350 £325 £322
10% offered a daily rate of more than £525 £476 £375
UK excluding London median daily rate £400 £400 £375
% change year-on-year - +6.66%  
Number of hourly rates quoted 0 5 1
Median hourly rate - £47.00 £32.50
Median hourly rate % change year-on-year - +44.61%  
UK excluding London median hourly rate £39.00 £45.75 £39.25
% change year-on-year -14.75% +16.56%  

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 South Wales with a requirement for process and methodology skills.

Contract Process & Methodology Skills
South Wales
Contract job vacancies with a requirement for process and methodology skills 473 467 347
As % of all contract IT job vacancies advertised in South Wales 82.69% 85.22% 77.28%
Number of daily rates quoted 345 324 236
Median daily rate £375 £375 £365
Median daily rate % change year-on-year - +2.73%  
90% offered a daily rate of more than £190 £275 £260
10% offered a daily rate of more than £525 £460 £475
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 41 26 16
Median hourly rate £33.75 £29.75 £18.90
Median hourly rate % change year-on-year +13.44% +57.40%  
90% offered a hourly rate of more than £14.50 £13.00 £11.25
10% offered a hourly rate of more than £55.00 £66.00 £34.50
UK excluding London median hourly rate £35.75 £38.00 £30.00
% change year-on-year -5.92% +26.66%  

TDD
Job Vacancy Trend in South Wales

The job posting trend of jobs advertised in South Wales 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 South Wales

TDD
Contractor Daily Rate Trend in South Wales

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

Contractor daily rate trend for TDD in South Wales

TDD
Contractor Daily Rate Histogram in South Wales

The daily rate distribution of IT jobs citing TDD in South Wales over the 3 months to 30 March 2017.

Contractor daily rate histogram for TDD in South Wales

TDD
Contractor Hourly Rate Trend in South Wales

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing TDD in South Wales.

Contractor hourly rate trend for TDD in South Wales

TDD
Contract Job Locations in South Wales

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the South Wales region over the 3 months to 30 March 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
Cardiff -23 13 £400 +6.66% 3
Newport -5 10 £500 +11.11% 1
TDD
Wales

For the 6 months to 30 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 South Wales region with a requirement for TDD.

1 74 (88.10%) Agile Software Development
2 57 (67.86%) Java
3 49 (58.33%) Scrum
3 49 (58.33%) BDD
4 30 (35.71%) Kanban
5 22 (26.19%) Software Engineering
6 20 (23.81%) Relational Database
6 20 (23.81%) DevOps
7 16 (19.05%) Scala
7 16 (19.05%) RESTful
7 16 (19.05%) NoSQL
8 15 (17.86%) JSON
8 15 (17.86%) OO
8 15 (17.86%) Python
9 14 (16.67%) HTTP
9 14 (16.67%) HTML
9 14 (16.67%) Web Development
9 14 (16.67%) OWASP
9 14 (16.67%) REST
9 14 (16.67%) Low Latency
9 14 (16.67%) Secure Coding
10 13 (15.48%) JavaScript
10 13 (15.48%) CSS
11 12 (14.29%) Open Source
11 12 (14.29%) Elasticsearch
11 12 (14.29%) AngularJS
12 11 (13.10%) Big Data
13 10 (11.90%) MongoDB
13 10 (11.90%) Web Services
14 9 (10.71%) Continuous Integration

TDD
Co-occurring IT Skills in South Wales 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 12 (14.29%) Elasticsearch
2 6 (7.14%) Apache Spark
3 2 (2.38%) Cloud Foundry
3 2 (2.38%) Confluence
4 1 (1.19%) Apache Airflow
4 1 (1.19%) Apache Pig
4 1 (1.19%) WebLogic
Applications
1 2 (2.38%) Photoshop
Business Applications
1 3 (3.57%) SAP Oil and Gas
Cloud Services
1 6 (7.14%) PaaS
2 5 (5.95%) Amazon AWS
3 3 (3.57%) Microsoft Azure
4 1 (1.19%) SaaS
Communications & Networking
1 14 (16.67%) HTTP
2 1 (1.19%) Kerberos
Database & Business Intelligence
1 20 (23.81%) Relational Database
2 16 (19.05%) NoSQL
3 11 (13.10%) Big Data
4 10 (11.90%) MongoDB
5 8 (9.52%) Hadoop
6 7 (8.33%) Apache Cassandra
7 3 (3.57%) Geospatial Data
7 3 (3.57%) MySQL
7 3 (3.57%) Neo4j
8 2 (2.38%) Apache Hive
8 2 (2.38%) Couchbase
8 2 (2.38%) Oracle Database
8 2 (2.38%) SQL Server
8 2 (2.38%) SQL Server 2008
8 2 (2.38%) SQL Server 2012
9 1 (1.19%) HBase
Development Applications
1 9 (10.71%) Jenkins
2 5 (5.95%) Cucumber
2 5 (5.95%) NUnit
3 4 (4.76%) Selenium
4 3 (3.57%) Git (software)
5 2 (2.38%) Jasmine
5 2 (2.38%) JIRA
5 2 (2.38%) JUnit
5 2 (2.38%) Subversion
5 2 (2.38%) Visual Studio
6 1 (1.19%) Atlassian Bamboo
6 1 (1.19%) Babel
6 1 (1.19%) gulp
6 1 (1.19%) jMock
6 1 (1.19%) Protractor
6 1 (1.19%) SoapUI
6 1 (1.19%) SonarQube
6 1 (1.19%) SpecFlow
6 1 (1.19%) TeamCity
6 1 (1.19%) webpack
General
1 7 (8.33%) Finance
2 5 (5.95%) Marketing
3 3 (3.57%) Electronics
3 3 (3.57%) Manufacturing
3 3 (3.57%) Telecoms
4 2 (2.38%) Banking
5 1 (1.19%) Investment Banking
5 1 (1.19%) Legal
Job Titles
1 71 (84.52%) Developer
2 37 (44.05%) Java Developer
3 19 (22.62%) Agile Developer
4 18 (21.43%) Agile Java Developer
5 13 (15.48%) Senior Developer
5 13 (15.48%) Senior Java Developer
6 10 (11.90%) Scala Developer
7 6 (7.14%) .NET Developer
7 6 (7.14%) Software Engineer
8 5 (5.95%) Elasticsearch Developer
8 5 (5.95%) Front End Developer (Client-Side Developer)
8 5 (5.95%) Java Engineer
9 4 (4.76%) Full Stack Developer
10 3 (3.57%) Architect
10 3 (3.57%) DevOps Engineer
10 3 (3.57%) Java Scala Developer
10 3 (3.57%) Java Software Engineer
10 3 (3.57%) PHP Developer
10 3 (3.57%) Senior Java Scala Developer
10 3 (3.57%) Senior Scala Developer
Libraries, Frameworks & Software Standards
1 16 (19.05%) RESTful
2 15 (17.86%) JSON
3 14 (16.67%) HTML
3 14 (16.67%) REST
4 13 (15.48%) CSS
5 12 (14.29%) AngularJS
6 10 (11.90%) Web Services
7 9 (10.71%) Node.js
8 8 (9.52%) CSS3
8 8 (9.52%) HTML5
9 7 (8.33%) .NET
10 6 (7.14%) ASP.NET Web API
10 6 (7.14%) jQuery
11 5 (5.95%) KnockoutJS
12 4 (4.76%) NHibernate
12 4 (4.76%) Twitter Bootstrap
13 3 (3.57%) Gherkin
13 3 (3.57%) J2EE
13 3 (3.57%) Swagger
14 2 (2.38%) ASP.NET
Miscellaneous
1 5 (5.95%) Analytical Skills
2 4 (4.76%) Algorithms
3 3 (3.57%) User Experience
4 2 (2.38%) W3C
5 1 (1.19%) Enterprise Software
5 1 (1.19%) Fintech
Operating Systems
1 5 (5.95%) Linux
2 3 (3.57%) Mac OS
3 1 (1.19%) Unix
Processes & Methodologies
1 74 (88.10%) Agile Software Development
2 49 (58.33%) BDD
2 49 (58.33%) Scrum
3 30 (35.71%) Kanban
4 22 (26.19%) Software Engineering
5 20 (23.81%) DevOps
6 15 (17.86%) OO
7 14 (16.67%) Low Latency
7 14 (16.67%) OWASP
7 14 (16.67%) Secure Coding
7 14 (16.67%) Web Development
8 12 (14.29%) Open Source
9 9 (10.71%) API Design
9 9 (10.71%) Continuous Integration
10 8 (9.52%) Automated Testing
11 7 (8.33%) API Development
11 7 (8.33%) Business Intelligence
11 7 (8.33%) High Availability
12 6 (7.14%) Front End Development
12 6 (7.14%) Unit Testing
Programming Languages
1 57 (67.86%) Java
2 16 (19.05%) Scala
3 15 (17.86%) Python
4 13 (15.48%) JavaScript
5 7 (8.33%) Go
6 6 (7.14%) C#
6 6 (7.14%) Ruby
7 3 (3.57%) PHP
7 3 (3.57%) SQL
8 2 (2.38%) TypeScript
Qualifications
1 4 (4.76%) Security Cleared
2 2 (2.38%) SC Cleared
Quality Assurance & Compliance
1 2 (2.38%) QA
1 2 (2.38%) WAI
1 2 (2.38%) WCAG
System Software
1 2 (2.38%) Docker
2 1 (1.19%) HDFS
2 1 (1.19%) vCloud
Systems Management
1 1 (1.19%) Opscode Chef
1 1 (1.19%) Puppet
Vendors
1 7 (8.33%) Oracle
1 7 (8.33%) SAP
2 5 (5.95%) Cloudera
3 4 (4.76%) Teradata
4 2 (2.38%) Zend
5 1 (1.19%) CA Agile Central
5 1 (1.19%) Hortonworks
5 1 (1.19%) HP