The following table provides summary statistics for contract job vacancies advertised in Cambridge 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)
Cambridgeshire / Cambridge
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 29 38 29
Rank change year-on-year +9 -9  
Contract jobs citing TDD 9 9 8
As % of all contract IT jobs advertised in Cambridge 2.86% 2.15% 2.47%
As % of the Processes & Methodologies category 3.41% 2.64% 3.24%
Number of daily rates quoted 6 8 8
Median daily rate £413 £403 £375
Median daily rate % change year-on-year +2.48% +7.33%  
90% offered a daily rate of more than £350 £371 £338
10% offered a daily rate of more than £465 £533 £405
UK excluding London median daily rate £400 £400 £375
% change year-on-year - +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
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 Cambridge with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Cambridge
Contract job vacancies with a requirement for process and methodology skills 264 341 247
As % of all contract IT job vacancies advertised in Cambridge 83.81% 81.58% 76.23%
Number of daily rates quoted 136 214 162
Median daily rate £425 £413 £375
Median daily rate % change year-on-year +3.03% +10.00%  
90% offered a daily rate of more than £225 £288 £225
10% offered a daily rate of more than £525 £525 £538
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 38 25 15
Median hourly rate £33.00 £37.50 £27.50
Median hourly rate % change year-on-year -12.00% +36.36%  
90% offered a hourly rate of more than £12.20 £17.50 £13.50
10% offered a hourly rate of more than £68.00 £57.50 £43.00
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 Cambridge

The job posting trend of jobs advertised in Cambridge 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 Cambridge

TDD
Contractor Daily Rate Trend in Cambridge

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

Contractor daily rate trend for TDD in Cambridge

TDD
Contractor Daily Rate Histogram in Cambridge

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

Contractor daily rate histogram for TDD in Cambridge

TDD
Contractor Hourly Rate Trend in Cambridge

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

Contractor hourly rate trend for TDD in Cambridge

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 Cambridge region with a requirement for TDD.

1 18 (75.00%) Agile Software Development
2 15 (62.50%) Java
3 14 (58.33%) JavaScript
3 14 (58.33%) Continuous Integration
3 14 (58.33%) Git (software)
4 11 (45.83%) HTML5
4 11 (45.83%) BDD
4 11 (45.83%) HTML
4 11 (45.83%) Scrum
5 10 (41.67%) Oracle
5 10 (41.67%) AngularJS
5 10 (41.67%) jQuery
5 10 (41.67%) Atlassian Bamboo
5 10 (41.67%) Jenkins
6 9 (37.50%) REST
7 8 (33.33%) Node.js
7 8 (33.33%) Microsoft Azure
7 8 (33.33%) SQL Server
7 8 (33.33%) .NET
7 8 (33.33%) C#
7 8 (33.33%) MVC
8 7 (29.17%) Spring
8 7 (29.17%) PHP
8 7 (29.17%) SQL
8 7 (29.17%) Microsoft
8 7 (29.17%) Cucumber
8 7 (29.17%) Selenium
8 7 (29.17%) Web Development
8 7 (29.17%) Relational Database
9 6 (25.00%) Octopus Deploy

TDD
Co-occurring IT Skills in Cambridge 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%) Tomcat
2 1 (4.17%) Cloud Foundry
2 1 (4.17%) WordPress
Applications
1 1 (4.17%) Adobe Illustrator
1 1 (4.17%) OmniGraffle
1 1 (4.17%) Photoshop
Business Applications
1 3 (12.50%) Payment Gateway
2 1 (4.17%) Oracle ERP
2 1 (4.17%) SDL Web 8
Cloud Services
1 8 (33.33%) Microsoft Azure
2 2 (8.33%) Amazon AWS
3 1 (4.17%) SaaS
Database & Business Intelligence
1 8 (33.33%) SQL Server
2 7 (29.17%) Relational Database
3 4 (16.67%) MongoDB
3 4 (16.67%) NoSQL
3 4 (16.67%) PostgreSQL
4 1 (4.17%) RDBMS
4 1 (4.17%) SQL Server 2008
4 1 (4.17%) SQL Server 2012
Development Applications
1 14 (58.33%) Git (software)
2 10 (41.67%) Atlassian Bamboo
2 10 (41.67%) Jenkins
3 7 (29.17%) Cucumber
3 7 (29.17%) Selenium
4 6 (25.00%) Octopus Deploy
4 6 (25.00%) Subversion
5 5 (20.83%) JUnit
5 5 (20.83%) Mercurial
6 4 (16.67%) Mockito
7 3 (12.50%) IntelliJ
7 3 (12.50%) Maven
7 3 (12.50%) WebStorm
8 2 (8.33%) gulp
9 1 (4.17%) Grunt
9 1 (4.17%) Jasmine
9 1 (4.17%) Mocha
9 1 (4.17%) NUnit
9 1 (4.17%) RSpec
9 1 (4.17%) WebDriver
General
1 1 (4.17%) Banking
Job Titles
1 18 (75.00%) Developer
2 7 (29.17%) JavaScript Developer
3 6 (25.00%) Java Developer
4 5 (20.83%) Full Stack Developer
4 5 (20.83%) PHP Developer
4 5 (20.83%) Web Developer
5 4 (16.67%) C# Developer
5 4 (16.67%) Senior Developer
6 3 (12.50%) PHP Web Developer
6 3 (12.50%) Senior JavaScript Developer
6 3 (12.50%) Senior PHP Developer
6 3 (12.50%) Senior PHP Web Developer
6 3 (12.50%) Senior Web Developer
6 3 (12.50%) Software Engineer
7 2 (8.33%) .NET Developer
7 2 (8.33%) Analyst
7 2 (8.33%) Angular Developer
7 2 (8.33%) Azure Developer
7 2 (8.33%) C# Software Engineer
8 1 (4.17%) ERP Business Analyst
Libraries, Frameworks & Software Standards
1 11 (45.83%) HTML
1 11 (45.83%) HTML5
2 10 (41.67%) AngularJS
2 10 (41.67%) jQuery
3 9 (37.50%) REST
4 8 (33.33%) .NET
4 8 (33.33%) Node.js
5 7 (29.17%) Spring
6 6 (25.00%) RESTful
7 4 (16.67%) Hibernate
7 4 (16.67%) JPA
8 3 (12.50%) CSS
8 3 (12.50%) JSON
8 3 (12.50%) WCF
8 3 (12.50%) WPF
8 3 (12.50%) XML
8 3 (12.50%) XML Schema
9 2 (8.33%) Ehcache
9 2 (8.33%) Spring MVC
9 2 (8.33%) Spring Security
Miscellaneous
1 1 (4.17%) Augmented Reality
1 1 (4.17%) Graphic Design
1 1 (4.17%) Life Science
1 1 (4.17%) Mobile App
1 1 (4.17%) Smart Energy
1 1 (4.17%) User Experience
Operating Systems
1 1 (4.17%) Windows
Processes & Methodologies
1 18 (75.00%) Agile Software Development
2 14 (58.33%) Continuous Integration
3 11 (45.83%) BDD
3 11 (45.83%) Scrum
4 8 (33.33%) MVC
5 7 (29.17%) Web Development
6 6 (25.00%) Service Design
7 4 (16.67%) BPMN
7 4 (16.67%) Domain-Driven Design
7 4 (16.67%) OO
7 4 (16.67%) Open Source
7 4 (16.67%) Software Engineering
8 3 (12.50%) Information Security
8 3 (12.50%) SOLID
9 2 (8.33%) API Design
9 2 (8.33%) Configuration Management
9 2 (8.33%) Continuous Deployment
9 2 (8.33%) E-Commerce
9 2 (8.33%) Product Management
9 2 (8.33%) Stakeholder Management
Programming Languages
1 15 (62.50%) Java
2 14 (58.33%) JavaScript
3 8 (33.33%) C#
4 7 (29.17%) PHP
4 7 (29.17%) SQL
5 3 (12.50%) Groovy
5 3 (12.50%) Scala
6 2 (8.33%) TypeScript
7 1 (4.17%) C++
7 1 (4.17%) ES6
7 1 (4.17%) Python
7 1 (4.17%) Ruby
Quality Assurance & Compliance
1 3 (12.50%) QA
System Software
1 1 (4.17%) Docker
Vendors
1 10 (41.67%) Oracle
2 7 (29.17%) Microsoft
3 1 (4.17%) Adobe