The following table provides summary statistics for permanent job vacancies advertised in Middlesex with a requirement for TDD skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited TDD over the 3 months to 28 March 2017 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
South East / Middlesex
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 4 21 34
Rank change year-on-year +17 +13  
Permanent jobs citing TDD 19 8 3
As % of all permanent IT jobs advertised in Middlesex 19.19% 4.47% 1.06%
As % of the Processes & Methodologies category 20.65% 6.15% 1.38%
Number of salaries quoted 18 8 3
Median salary £43,750 £55,000 £34,000
Median salary % change year-on-year -20.45% +61.76%  
UK excluding London median salary £45,000 £45,000 £40,500
% change year-on-year - +11.11%  

TDD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in Middlesex with a requirement for process and methodology skills.

Process & Methodology Skills
Middlesex
Permanent job vacancies with a requirement for process and methodology skills 92 130 217
As % of all permanent IT job vacancies advertised in Middlesex 92.93% 72.63% 76.95%
Number of salaries quoted 74 119 143
Median salary £50,000 £57,500 £51,000
Median salary % change year-on-year -13.04% +12.74%  
90% offered a salary of more than £37,200 £40,000 £34,000
10% offered a salary of more than £60,000 £62,500 £130,000
UK excluding London median salary £45,000 £45,000 £43,000
% change year-on-year - +4.65%  

TDD
Job Vacancy Trend in Middlesex

The job posting trend of jobs advertised in Middlesex citing TDD as a proportion of all permanent or contract IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for TDD in Middlesex

TDD
Salary Trend in Middlesex

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing TDD in Middlesex.

Salary trend for TDD in Middlesex

TDD
Salary Histogram in Middlesex

The salary distribution of IT jobs citing TDD in Middlesex over the 3 months to 28 March 2017.

Salary histogram for TDD in Middlesex

TDD
Top 30 Co-occurring IT Skills in Middlesex

For the 6 months to 28 March 2017, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Middlesex region with a requirement for TDD.

1 33 (84.62%) SQL Server
2 29 (74.36%) .NET
3 28 (71.79%) Agile Software Development
4 27 (69.23%) C#
4 27 (69.23%) AngularJS
5 25 (64.10%) JavaScript
6 24 (61.54%) .NET Framework
7 23 (58.97%) Continuous Integration
7 23 (58.97%) KnockoutJS
8 21 (53.85%) BDD
9 19 (48.72%) ASP.NET Web API
10 18 (46.15%) DevOps
10 18 (46.15%) Microsoft
11 17 (43.59%) Puppet
12 16 (41.03%) Git (software)
12 16 (41.03%) Amazon AWS
12 16 (41.03%) ASP.NET
13 14 (35.90%) QA
14 13 (33.33%) TeamCity
14 13 (33.33%) Machine Learning
14 13 (33.33%) Predictive Analysis
14 13 (33.33%) Octopus Deploy
14 13 (33.33%) Continuous Deployment
15 12 (30.77%) Intel
16 10 (25.64%) CSS
16 10 (25.64%) HTML
17 9 (23.08%) Java
17 9 (23.08%) OO
17 9 (23.08%) Spring
18 8 (20.51%) Software Engineering

TDD
Co-occurring IT Skills in Middlesex 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 (5.13%) BizTalk Server
1 2 (5.13%) SharePoint
2 1 (2.56%) Confluence
2 1 (2.56%) Elasticsearch
Applications
1 2 (5.13%) MS Excel
Business Applications
1 1 (2.56%) Oracle BPM
Cloud Services
1 16 (41.03%) Amazon AWS
2 2 (5.13%) IaaS
2 2 (5.13%) Microsoft Azure
2 2 (5.13%) PaaS
Communications & Networking
1 2 (5.13%) Internet
Database & Business Intelligence
1 33 (84.62%) SQL Server
2 8 (20.51%) NoSQL
3 7 (17.95%) MongoDB
3 7 (17.95%) Neo4j
4 6 (15.38%) SQL Server 2008
5 2 (5.13%) Amazon Redshift
6 1 (2.56%) Apache Cassandra
Development Applications
1 16 (41.03%) Git (software)
2 13 (33.33%) Octopus Deploy
2 13 (33.33%) TeamCity
3 8 (20.51%) JUnit
4 7 (17.95%) Subversion
5 3 (7.69%) Team Foundation Server
5 3 (7.69%) Visual Studio
6 2 (5.13%) Cucumber
7 1 (2.56%) IntelliJ
7 1 (2.56%) Jasmine
7 1 (2.56%) JIRA
7 1 (2.56%) Mocha
7 1 (2.56%) Mockito
General
1 1 (2.56%) Games
1 1 (2.56%) Telecoms
Job Titles
1 35 (89.74%) Developer
2 19 (48.72%) C# Developer
3 18 (46.15%) .NET Developer
4 16 (41.03%) C# .NET Developer
5 9 (23.08%) Java Developer
6 8 (20.51%) Principal Developer
7 7 (17.95%) J2EE Developer
7 7 (17.95%) Java/J2EE Developer
8 6 (15.38%) Principal .NET Developer
8 6 (15.38%) Software Developer
9 5 (12.82%) Senior Developer
9 5 (12.82%) Team Leader
10 4 (10.26%) Senior .NET Developer
10 4 (10.26%) Senior C# .NET Developer
10 4 (10.26%) Senior C# Developer
11 3 (7.69%) .NET Team Leader
11 3 (7.69%) C# Software Developer
11 3 (7.69%) Lead .NET Developer
11 3 (7.69%) Lead Developer
12 2 (5.13%) Architect
Libraries, Frameworks & Software Standards
1 29 (74.36%) .NET
2 27 (69.23%) AngularJS
3 24 (61.54%) .NET Framework
4 23 (58.97%) KnockoutJS
5 19 (48.72%) ASP.NET Web API
6 16 (41.03%) ASP.NET
7 10 (25.64%) CSS
7 10 (25.64%) HTML
8 9 (23.08%) Spring
9 8 (20.51%) ActiveMQ
9 8 (20.51%) jQuery
9 8 (20.51%) XML
10 7 (17.95%) J2EE
10 7 (17.95%) JDBC
10 7 (17.95%) JSP
10 7 (17.95%) XSL
10 7 (17.95%) XSLT
11 4 (10.26%) JSON
12 3 (7.69%) Entity Framework
12 3 (7.69%) LINQ
Miscellaneous
1 2 (5.13%) Cloud Native
1 2 (5.13%) Enterprise Software
1 2 (5.13%) Internet of Things
Operating Systems
1 4 (10.26%) Windows
2 2 (5.13%) Linux
3 1 (2.56%) Unix
Processes & Methodologies
1 28 (71.79%) Agile Software Development
2 23 (58.97%) Continuous Integration
3 21 (53.85%) BDD
4 18 (46.15%) DevOps
5 13 (33.33%) Continuous Deployment
5 13 (33.33%) Machine Learning
5 13 (33.33%) Predictive Analysis
6 9 (23.08%) OO
7 8 (20.51%) Analytics
7 8 (20.51%) Data Analytics
7 8 (20.51%) SDLC
7 8 (20.51%) Software Engineering
8 7 (17.95%) Integration Testing
9 6 (15.38%) MVC
10 4 (10.26%) Scrum
11 3 (7.69%) Kanban
11 3 (7.69%) OOP
11 3 (7.69%) SOLID
11 3 (7.69%) Unit Testing
12 2 (5.13%) Presales
Programming Languages
1 27 (69.23%) C#
2 25 (64.10%) JavaScript
3 9 (23.08%) Java
4 2 (5.13%) Python
4 2 (5.13%) Ruby
4 2 (5.13%) SQL
5 1 (2.56%) Bash Shell
5 1 (2.56%) Groovy
5 1 (2.56%) Scala
5 1 (2.56%) Shell Script
5 1 (2.56%) VB.NET
Qualifications
1 2 (5.13%) MCAD
1 2 (5.13%) Microsoft Certification
Quality Assurance & Compliance
1 14 (35.90%) QA
Systems Management
1 17 (43.59%) Puppet
2 4 (10.26%) Opscode Chef
3 1 (2.56%) Grafana
3 1 (2.56%) Kibana
3 1 (2.56%) logstash
Vendors
1 18 (46.15%) Microsoft
2 12 (30.77%) Intel
3 1 (2.56%) AppDynamics
3 1 (2.56%) Oracle
3 1 (2.56%) Splunk