The following table provides summary statistics for contract job vacancies advertised in Birmingham 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 27 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)
West Midlands / Birmingham
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 38 37 24
Rank change year-on-year -1 -13  
Contract jobs citing TDD 22 35 50
As % of all contract IT jobs advertised in Birmingham 3.46% 4.23% 6.88%
As % of the Processes & Methodologies category 4.21% 5.09% 8.83%
Number of daily rates quoted 13 27 36
Median daily rate £325 £375 £356
Median daily rate % change year-on-year -13.33% +5.26%  
90% offered a daily rate of more than £275 £276 £325
10% offered a daily rate of more than £485 £435 £375
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
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 Birmingham with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Birmingham
Contract job vacancies with a requirement for process and methodology skills 522 687 566
As % of all contract IT job vacancies advertised in Birmingham 82.20% 83.07% 77.85%
Number of daily rates quoted 343 480 373
Median daily rate £400 £375 £375
Median daily rate % change year-on-year +6.66% -  
90% offered a daily rate of more than £280 £250 £275
10% offered a daily rate of more than £550 £500 £500
UK excluding London median daily rate £415 £400 £385
% change year-on-year +3.75% +3.89%  
Number of hourly rates quoted 10 14 13
Median hourly rate £14.22 £25.00 £47.75
Median hourly rate % change year-on-year -43.14% -47.64%  
90% offered a hourly rate of more than £10.16 £12.43 £22.75
10% offered a hourly rate of more than £28.75 £42.50 £63.00
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 Birmingham

The job posting trend of jobs advertised in Birmingham 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 Birmingham

TDD
Contractor Daily Rate Trend in Birmingham

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

Contractor daily rate trend for TDD in Birmingham

TDD
Contractor Daily Rate Histogram in Birmingham

The daily rate distribution of IT jobs citing TDD in Birmingham over the 3 months to 27 June 2017.

Contractor daily rate histogram for TDD in Birmingham

TDD
Contractor Hourly Rate Trend in Birmingham

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

Contractor hourly rate trend for TDD in Birmingham

For the 6 months to 27 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 Birmingham region with a requirement for TDD.

1 44 (80.00%) Agile Software Development
2 30 (54.55%) BDD
3 22 (40.00%) JavaScript
4 20 (36.36%) HTML
5 19 (34.55%) CSS
5 19 (34.55%) AngularJS
6 18 (32.73%) Git (software)
6 18 (32.73%) React
7 17 (30.91%) Scrum
8 16 (29.09%) MVC
9 14 (25.45%) Java
9 14 (25.45%) Front End Development
10 13 (23.64%) RESTful
10 13 (23.64%) .NET
11 12 (21.82%) Continuous Integration
12 11 (20.00%) Spring
12 11 (20.00%) SQL Server
13 10 (18.18%) SOAP
13 10 (18.18%) jQuery
14 9 (16.36%) Microsoft Azure
14 9 (16.36%) Node.js
14 9 (16.36%) Kanban
15 8 (14.55%) OO
15 8 (14.55%) JUnit
15 8 (14.55%) Mockito
15 8 (14.55%) Jenkins
16 7 (12.73%) Ember.js
16 7 (12.73%) CSS3
16 7 (12.73%) HTML5
16 7 (12.73%) SonarQube

TDD
Co-occurring IT Skills in Birmingham 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 (5.45%) JBoss
2 2 (3.64%) CMS
2 2 (3.64%) Elasticsearch
2 2 (3.64%) Oracle SOA Suite
2 2 (3.64%) WordPress
3 1 (1.82%) DNN
3 1 (1.82%) Drupal
3 1 (1.82%) Mule
3 1 (1.82%) Mule ESB
3 1 (1.82%) Tomcat
Applications
1 3 (5.45%) Photoshop
2 2 (3.64%) Adobe After Effects
2 2 (3.64%) Adobe Creative Suite
2 2 (3.64%) Adobe Illustrator
3 1 (1.82%) Fireworks
3 1 (1.82%) Microsoft Excel
Cloud Services
1 9 (16.36%) Microsoft Azure
2 4 (7.27%) GitHub
3 3 (5.45%) Amazon AWS
4 1 (1.82%) AWS CloudFormation
Communications & Networking
1 2 (3.64%) HTTP
1 2 (3.64%) Internet
2 1 (1.82%) VoIP
Database & Business Intelligence
1 11 (20.00%) SQL Server
2 4 (7.27%) MySQL
3 3 (5.45%) Data Warehouse
3 3 (5.45%) SQL Server 2014
3 3 (5.45%) SQL Server 2016
3 3 (5.45%) SQL Server Reporting Services
4 2 (3.64%) MongoDB
4 2 (3.64%) PostgreSQL
4 2 (3.64%) QlikView
4 2 (3.64%) SQL Server Analysis Services
4 2 (3.64%) SQL Server Integration Services
5 1 (1.82%) Apache Cassandra
5 1 (1.82%) NoSQL
5 1 (1.82%) SQL Server 2012
Development Applications
1 18 (32.73%) Git (software)
2 8 (14.55%) Jenkins
2 8 (14.55%) JUnit
2 8 (14.55%) Mockito
3 7 (12.73%) jMock
3 7 (12.73%) Maven
3 7 (12.73%) SonarQube
4 6 (10.91%) DbUnit
4 6 (10.91%) Team Foundation Server
5 5 (9.09%) Visual Studio
6 4 (7.27%) PHPUnit
7 3 (5.45%) Grunt
7 3 (5.45%) gulp
8 2 (3.64%) Babel
8 2 (3.64%) Cucumber
8 2 (3.64%) IntelliJ
8 2 (3.64%) Mocha
8 2 (3.64%) Subversion
8 2 (3.64%) Visual Studio Team System
8 2 (3.64%) webpack
General
1 3 (5.45%) Marketing
2 2 (3.64%) Finance
2 2 (3.64%) Retail
3 1 (1.82%) Automotive
Job Titles
1 49 (89.09%) Developer
2 10 (18.18%) Front End Developer (Client-Side Developer)
2 10 (18.18%) Java Developer
3 9 (16.36%) .NET Developer
4 8 (14.55%) JavaScript Developer
4 8 (14.55%) Senior Developer
5 4 (7.27%) C# .NET Developer
5 4 (7.27%) C# Developer
5 4 (7.27%) PHP Developer
5 4 (7.27%) Senior Java Developer
5 4 (7.27%) Symfony Developer
6 3 (5.45%) Architect
6 3 (5.45%) Business Intelligence Developer
6 3 (5.45%) Senior .NET Developer
7 2 (3.64%) ASP.NET MVC Developer
7 2 (3.64%) PHP Laravel Developer
7 2 (3.64%) Senior Software Engineer
7 2 (3.64%) Software Engineer
7 2 (3.64%) Technical Leader
7 2 (3.64%) Web Developer
Libraries, Frameworks & Software Standards
1 20 (36.36%) HTML
2 19 (34.55%) AngularJS
2 19 (34.55%) CSS
3 18 (32.73%) React
4 13 (23.64%) .NET
4 13 (23.64%) RESTful
5 11 (20.00%) Spring
6 10 (18.18%) jQuery
6 10 (18.18%) SOAP
7 9 (16.36%) Node.js
8 7 (12.73%) ASP.NET
8 7 (12.73%) CSS3
8 7 (12.73%) Ember.js
8 7 (12.73%) HTML5
9 6 (10.91%) ASP.NET MVC
9 6 (10.91%) PowerMock
9 6 (10.91%) REST
9 6 (10.91%) Spring Boot
10 5 (9.09%) Twitter Bootstrap
10 5 (9.09%) Web Services
Miscellaneous
1 7 (12.73%) User Experience
2 3 (5.45%) Greenfield Project
3 2 (3.64%) Computer Science
4 1 (1.82%) Enterprise Software
4 1 (1.82%) Fintech
4 1 (1.82%) Mobile App
Operating Systems
1 3 (5.45%) Linux
2 1 (1.82%) Mac OS X
Processes & Methodologies
1 44 (80.00%) Agile Software Development
2 30 (54.55%) BDD
3 17 (30.91%) Scrum
4 16 (29.09%) MVC
5 14 (25.45%) Front End Development
6 12 (21.82%) Continuous Integration
7 9 (16.36%) Kanban
8 8 (14.55%) OO
9 6 (10.91%) Open Source
9 6 (10.91%) Web Development
10 5 (9.09%) OOP
10 5 (9.09%) Test Automation
11 4 (7.27%) E-Commerce
11 4 (7.27%) OO PHP
11 4 (7.27%) SOA
11 4 (7.27%) Software Engineering
11 4 (7.27%) SOLID
11 4 (7.27%) Unit Testing
12 3 (5.45%) SDLC
12 3 (5.45%) User Stories
Programming Languages
1 22 (40.00%) JavaScript
2 14 (25.45%) Java
3 7 (12.73%) C#
3 7 (12.73%) PHP
4 6 (10.91%) SQL
5 4 (7.27%) PHP 4
5 4 (7.27%) PHP 5
6 2 (3.64%) Groovy
6 2 (3.64%) PL/SQL
7 1 (1.82%) C
7 1 (1.82%) C++
7 1 (1.82%) Python
7 1 (1.82%) Ruby
7 1 (1.82%) Scala
7 1 (1.82%) VB.NET
Qualifications
1 2 (3.64%) Sun Certification
2 1 (1.82%) DBS Check
Quality Assurance & Compliance
1 2 (3.64%) QA
2 1 (1.82%) WAI
2 1 (1.82%) WCAG
System Software
1 3 (5.45%) Docker
Systems Management
1 2 (3.64%) Kubernetes
2 1 (1.82%) Ansible
2 1 (1.82%) Opscode Chef
2 1 (1.82%) Puppet
2 1 (1.82%) Terraform
Vendors
1 5 (9.09%) Microsoft
2 2 (3.64%) Adobe
2 2 (3.64%) Oracle
3 1 (1.82%) Zend