The following table provides summary statistics for contract job vacancies advertised in Oxford 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 26 June 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)
Oxfordshire / Oxford
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 4 15 9
Rank change year-on-year +11 -6  
Contract jobs citing TDD 69 29 43
As % of all contract IT jobs advertised in Oxford 21.10% 9.83% 12.50%
As % of the Processes & Methodologies category 24.82% 12.39% 14.78%
Number of daily rates quoted 58 25 39
Median daily rate £525 £475 £410
Median daily rate % change year-on-year +10.52% +15.85%  
90% offered a daily rate of more than £375 £375 £373
10% offered a daily rate of more than £580 £525 £500
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 1
Median hourly rate - - £45.00
UK excluding London median hourly rate £41.50 £40.00 £43.75
% change year-on-year +3.75% -8.57%  

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 Oxford with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Oxford
Contract job vacancies with a requirement for process and methodology skills 278 234 291
As % of all contract IT job vacancies advertised in Oxford 85.02% 79.32% 84.59%
Number of daily rates quoted 219 177 238
Median daily rate £475 £425 £403
Median daily rate % change year-on-year +11.76% +5.59%  
90% offered a daily rate of more than £350 £325 £263
10% offered a daily rate of more than £580 £520 £500
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 7 5 7
Median hourly rate £15.50 £16.00 £27.50
Median hourly rate % change year-on-year -3.12% -41.81%  
90% offered a hourly rate of more than £11.77 £13.80 £8.50
10% offered a hourly rate of more than £28.50 £47.50 £45.00
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in Oxford

The job posting trend of jobs advertised in Oxford 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 Oxford

TDD
Contractor Daily Rate Trend in Oxford

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

Contractor daily rate trend for TDD in Oxford

TDD
Contractor Daily Rate Histogram in Oxford

The daily rate distribution of IT jobs citing TDD in Oxford over the 3 months to 26 June 2017.

Contractor daily rate histogram for TDD in Oxford

TDD
Contractor Hourly Rate Trend in Oxford

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

Contractor hourly rate trend for TDD in Oxford

For the 6 months to 26 June 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 Oxford region with a requirement for TDD.

1 69 (82.14%) Agile Software Development
2 42 (50.00%) Java
3 41 (48.81%) Scrum
4 40 (47.62%) JavaScript
4 40 (47.62%) Continuous Integration
5 38 (45.24%) Pair Programming
6 33 (39.29%) BDD
7 32 (38.10%) HTML
7 32 (38.10%) CSS
7 32 (38.10%) Amazon AWS
8 27 (32.14%) Unit Testing
9 26 (30.95%) DevOps
10 24 (28.57%) Node.js
11 23 (27.38%) Spring
11 23 (27.38%) Test Automation
12 22 (26.19%) Cucumber
12 22 (26.19%) AngularJS
13 20 (23.81%) Jenkins
13 20 (23.81%) JUnit
13 20 (23.81%) SQL
14 19 (22.62%) Kanban
14 19 (22.62%) Maven
14 19 (22.62%) Software Engineering
14 19 (22.62%) GitHub
15 18 (21.43%) Mockito
15 18 (21.43%) NoSQL
15 18 (21.43%) WebSphere
15 18 (21.43%) Java EE
15 18 (21.43%) PHP
15 18 (21.43%) WebSphere Application Server

TDD
Co-occurring IT Skills in Oxford 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 18 (21.43%) JBoss
1 18 (21.43%) WebSphere
1 18 (21.43%) WebSphere Application Server
2 14 (16.67%) WebSphere Process Server
3 5 (5.95%) Apache Spark
4 2 (2.38%) Apache
4 2 (2.38%) nginx
4 2 (2.38%) Tomcat
5 1 (1.19%) Alfresco
5 1 (1.19%) Apache Solr
5 1 (1.19%) CMS
5 1 (1.19%) Confluence
5 1 (1.19%) Drupal
5 1 (1.19%) Elasticsearch
5 1 (1.19%) NServiceBus
5 1 (1.19%) Sitefinity
Business Applications
1 7 (8.33%) Magento
Cloud Services
1 32 (38.10%) Amazon AWS
2 19 (22.62%) GitHub
3 5 (5.95%) AWS Lambda
4 2 (2.38%) Microsoft Azure
5 1 (1.19%) Amazon EMR
5 1 (1.19%) Amazon S3
5 1 (1.19%) AWS CloudFormation
Database & Business Intelligence
1 18 (21.43%) NoSQL
2 13 (15.48%) MongoDB
3 10 (11.90%) Big Data
4 5 (5.95%) Amazon DynamoDB
4 5 (5.95%) Oracle Database
5 4 (4.76%) Apache Cassandra
5 4 (4.76%) Hadoop
6 3 (3.57%) SQL Server
7 2 (2.38%) MySQL
7 2 (2.38%) Redis
8 1 (1.19%) SQL Server 2012
Development Applications
1 22 (26.19%) Cucumber
2 20 (23.81%) Jenkins
2 20 (23.81%) JUnit
3 19 (22.62%) Maven
4 18 (21.43%) Mockito
5 14 (16.67%) Git (software)
6 11 (13.10%) JIRA
6 11 (13.10%) Selenium
7 7 (8.33%) Grunt
7 7 (8.33%) gulp
8 6 (7.14%) Bitbucket
8 6 (7.14%) IntelliJ
9 4 (4.76%) Atlassian Bamboo
9 4 (4.76%) Mocha
9 4 (4.76%) WebDriver
10 3 (3.57%) Talend Open Studio
11 2 (2.38%) Jasmine
11 2 (2.38%) Team Foundation Server
12 1 (1.19%) Gradle
12 1 (1.19%) JProfiler
General
1 8 (9.52%) Publishing
2 1 (1.19%) Finance
2 1 (1.19%) Games
Job Titles
1 68 (80.95%) Developer
2 26 (30.95%) Java Developer
3 19 (22.62%) Node.js Developer
4 11 (13.10%) SQL Developer
5 10 (11.90%) Cloud Developer
6 9 (10.71%) AWS Developer
6 9 (10.71%) JavaScript Developer
7 8 (9.52%) Agile Developer
8 6 (7.14%) PHP Developer
8 6 (7.14%) Senior Developer
9 5 (5.95%) Python Developer
9 5 (5.95%) Senior Java Developer
10 4 (4.76%) Angular Developer
10 4 (4.76%) AWS Engineer
10 4 (4.76%) E-Commerce Developer
10 4 (4.76%) HTML CSS Developer
10 4 (4.76%) HTML Developer
10 4 (4.76%) Lead Developer
10 4 (4.76%) Lead Java Developer
10 4 (4.76%) Software Engineer
Libraries, Frameworks & Software Standards
1 32 (38.10%) CSS
1 32 (38.10%) HTML
2 24 (28.57%) Node.js
3 23 (27.38%) Spring
4 22 (26.19%) AngularJS
5 18 (21.43%) Java EE
5 18 (21.43%) Web Services
6 13 (15.48%) HTML5
7 12 (14.29%) CSS3
8 11 (13.10%) JSON
8 11 (13.10%) Sass
9 10 (11.90%) React
10 8 (9.52%) LESS
11 7 (8.33%) Symfony
12 6 (7.14%) Dropwizard
12 6 (7.14%) Hystrix
12 6 (7.14%) Play Framework
12 6 (7.14%) Scalatra
13 5 (5.95%) RESTful
13 5 (5.95%) SOAP
Miscellaneous
1 4 (4.76%) Client/Server
2 2 (2.38%) Algorithms
2 2 (2.38%) Computer Science
2 2 (2.38%) Semantic Web
3 1 (1.19%) Data Structures
3 1 (1.19%) Enterprise Software
3 1 (1.19%) Fintech
3 1 (1.19%) Linked Data
Operating Systems
1 5 (5.95%) Linux
1 5 (5.95%) Unix
2 1 (1.19%) Android
2 1 (1.19%) Apple iOS
Processes & Methodologies
1 69 (82.14%) Agile Software Development
2 41 (48.81%) Scrum
3 40 (47.62%) Continuous Integration
4 38 (45.24%) Pair Programming
5 33 (39.29%) BDD
6 27 (32.14%) Unit Testing
7 26 (30.95%) DevOps
8 23 (27.38%) Test Automation
9 19 (22.62%) Kanban
9 19 (22.62%) Software Engineering
10 16 (19.05%) BPEL
10 16 (19.05%) BPMN
11 15 (17.86%) Migration
12 14 (16.67%) Web Development
13 11 (13.10%) MVC
13 11 (13.10%) Open Source
14 10 (11.90%) E-Commerce
14 10 (11.90%) Front End Development
15 9 (10.71%) API Development
16 8 (9.52%) Mentoring
Programming Languages
1 42 (50.00%) Java
2 40 (47.62%) JavaScript
3 20 (23.81%) SQL
4 18 (21.43%) PHP
5 11 (13.10%) Python
6 9 (10.71%) Scala
7 6 (7.14%) Groovy
8 4 (4.76%) C#
9 2 (2.38%) TypeScript
10 1 (1.19%) C
10 1 (1.19%) R
Qualifications
1 3 (3.57%) Degree
2 1 (1.19%) AWS Certification
2 1 (1.19%) Computer Science Degree
Quality Assurance & Compliance
1 8 (9.52%) QA
System Software
1 7 (8.33%) Docker
2 1 (1.19%) Apache ZooKeeper
Systems Management
1 7 (8.33%) Terraform
2 5 (5.95%) Puppet
3 4 (4.76%) Mesos
3 4 (4.76%) Opscode Chef
4 1 (1.19%) Ansible
4 1 (1.19%) Kubernetes
Vendors
1 6 (7.14%) New Relic
2 5 (5.95%) Oracle
3 4 (4.76%) Infor
4 3 (3.57%) Talend
5 2 (2.38%) Zend
6 1 (1.19%) HP