The following table provides summary statistics for permanent job vacancies advertised in Liverpool 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 23 March 2017 with a comparison to the same period in the previous 2 years.

3 months to
23 Mar 2017
Same period 2016 Same period 2015
Test-Driven Development (TDD)
Merseyside / Liverpool
Rank 34 26 31
Rank change year-on-year -8 +5  
Permanent jobs citing TDD 18 30 26
As % of all permanent IT jobs advertised in Liverpool 4.51% 7.65% 6.24%
As % of the Processes & Methodologies category 5.06% 8.75% 7.05%
Number of salaries quoted 16 29 23
Median salary £42,500 £40,000 £35,000
Median salary % change year-on-year +6.25% +14.28%  
90% offered a salary of more than £40,000 £30,000 £30,000
10% offered a salary of more than £70,000 £40,050 £45,000
UK excluding London median salary £45,000 £45,000 £40,000
% change year-on-year - +12.50%  

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 Liverpool with a requirement for process and methodology skills.

Process & Methodology Skills
Liverpool
Permanent job vacancies with a requirement for process and methodology skills 356 343 369
As % of all permanent IT job vacancies advertised in Liverpool 89.22% 87.50% 88.49%
Number of salaries quoted 265 272 285
Median salary £40,000 £40,000 £45,000
Median salary % change year-on-year - -11.11%  
90% offered a salary of more than £28,000 £30,000 £29,500
10% offered a salary of more than £67,500 £70,000 £60,000
UK excluding London median salary £45,000 £45,000 £43,000
% change year-on-year - +4.65%  

TDD
Job Vacancy Trend in Liverpool

The job posting trend of jobs advertised in Liverpool 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 Liverpool

TDD
Salary Trend in Liverpool

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

Salary trend for TDD in Liverpool

TDD
Salary Histogram in Liverpool

The salary distribution of IT jobs citing TDD in Liverpool over the 3 months to 23 March 2017.

Salary histogram for TDD in Liverpool

TDD
Top 30 Related IT Skills in Liverpool

For the 6 months to 23 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 Liverpool region with a requirement for TDD.

1 39 (81.25%) Agile Software Development
2 33 (68.75%) .NET
3 29 (60.42%) Node.js
4 28 (58.33%) RESTful
5 27 (56.25%) C#
6 26 (54.17%) BDD
7 24 (50.00%) MVC
8 22 (45.83%) SQL Server
8 22 (45.83%) ASP.NET
8 22 (45.83%) Git (software)
8 22 (45.83%) ASP.NET MVC
8 22 (45.83%) .NET Framework
9 20 (41.67%) Ruby
9 20 (41.67%) Entity Framework
10 18 (37.50%) NoSQL
10 18 (37.50%) ASP.NET Web API
11 17 (35.42%) SQL Server 2014
11 17 (35.42%) ASP.NET MVC 5
11 17 (35.42%) Code First Entity Framework
11 17 (35.42%) Web Application Development
11 17 (35.42%) WCF
12 14 (29.17%) Analytical Skills
13 12 (25.00%) SDLC
13 12 (25.00%) Open Source
13 12 (25.00%) Scrum
14 10 (20.83%) PHP
15 9 (18.75%) JavaScript
15 9 (18.75%) OOP
15 9 (18.75%) LAMP
15 9 (18.75%) Finance

TDD
Top Related IT Skills in Liverpool 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 (4.17%) Confluence
1 2 (4.17%) Elasticsearch
1 2 (4.17%) nginx
2 1 (2.08%) BizTalk Server
2 1 (2.08%) SharePoint
Applications
1 2 (4.17%) MS Project
Cloud Services
1 6 (12.50%) SaaS
2 5 (10.42%) Amazon AWS
3 1 (2.08%) Amazon S3
3 1 (2.08%) Amazon SQS
3 1 (2.08%) CloudFront
3 1 (2.08%) Microsoft Azure
Database & Business Intelligence
1 22 (45.83%) SQL Server
2 18 (37.50%) NoSQL
3 17 (35.42%) SQL Server 2014
4 5 (10.42%) MongoDB
5 3 (6.25%) MySQL
5 3 (6.25%) PostgreSQL
6 1 (2.08%) Amazon DynamoDB
6 1 (2.08%) Apache Cassandra
6 1 (2.08%) Big Data
6 1 (2.08%) Blockchain
6 1 (2.08%) RDBMS
6 1 (2.08%) Relational Database
Development Applications
1 22 (45.83%) Git (software)
2 4 (8.33%) NUnit
2 4 (8.33%) Visual Studio
3 3 (6.25%) Subversion
4 2 (4.17%) Cucumber
4 2 (4.17%) Jenkins
4 2 (4.17%) JIRA
4 2 (4.17%) RSpec
4 2 (4.17%) Team Foundation Server
5 1 (2.08%) GitLab
5 1 (2.08%) MSTest
5 1 (2.08%) Octopus Deploy
5 1 (2.08%) Selenium
5 1 (2.08%) WebDriver
General
1 9 (18.75%) Finance
2 5 (10.42%) Advertising
2 5 (10.42%) Banking
2 5 (10.42%) Investment Banking
3 2 (4.17%) Telecoms
4 1 (2.08%) Marketing
Job Titles
1 38 (79.17%) Developer
2 22 (45.83%) .NET Developer
3 9 (18.75%) PHP Developer
4 4 (8.33%) ASP.NET Developer
4 4 (8.33%) C# .NET Developer
4 4 (8.33%) C# ASP.NET Developer
4 4 (8.33%) C# Developer
4 4 (8.33%) Development Manager
4 4 (8.33%) Senior Development Manager
4 4 (8.33%) Senior Manager
5 3 (6.25%) Application Development Manager
5 3 (6.25%) Applications Development Manager
5 3 (6.25%) Applications Manager
5 3 (6.25%) ASP.NET MVC Developer
5 3 (6.25%) Programmer
5 3 (6.25%) Software Developer
5 3 (6.25%) Software Programmer
6 2 (4.17%) Agile Business Analyst
6 2 (4.17%) LAMP Developer
6 2 (4.17%) Software Manager
Libraries, Frameworks & Software Standards
1 33 (68.75%) .NET
2 29 (60.42%) Node.js
3 28 (58.33%) RESTful
4 22 (45.83%) .NET Framework
4 22 (45.83%) ASP.NET
4 22 (45.83%) ASP.NET MVC
5 20 (41.67%) Entity Framework
6 18 (37.50%) ASP.NET Web API
7 17 (35.42%) ASP.NET MVC 5
7 17 (35.42%) Code First Entity Framework
7 17 (35.42%) WCF
8 9 (18.75%) LAMP
9 7 (14.58%) CSS
9 7 (14.58%) HTML
10 4 (8.33%) AngularJS
11 3 (6.25%) Ajax
11 3 (6.25%) jQuery
11 3 (6.25%) Ruby on Rails
11 3 (6.25%) Web Services
11 3 (6.25%) XML
Miscellaneous
1 14 (29.17%) Analytical Skills
2 5 (10.42%) Hedge funds
3 2 (4.17%) N-Tier
4 1 (2.08%) Client/Server
4 1 (2.08%) iPad
4 1 (2.08%) Mobile App
4 1 (2.08%) Replication
4 1 (2.08%) Streaming Video
Operating Systems
1 3 (6.25%) Linux
2 2 (4.17%) Ubuntu
3 1 (2.08%) Apple iOS
3 1 (2.08%) Windows
Processes & Methodologies
1 39 (81.25%) Agile Software Development
2 26 (54.17%) BDD
3 24 (50.00%) MVC
4 17 (35.42%) Web Application Development
5 12 (25.00%) Open Source
5 12 (25.00%) Scrum
5 12 (25.00%) SDLC
6 9 (18.75%) Domain-Driven Design
6 9 (18.75%) Kanban
6 9 (18.75%) Microservices
6 9 (18.75%) OOP
6 9 (18.75%) SOLID
7 7 (14.58%) DevOps
8 6 (12.50%) Continuous Integration
8 6 (12.50%) Software Engineering
9 5 (10.42%) Release Management
9 5 (10.42%) User Stories
10 3 (6.25%) Analytics
10 3 (6.25%) Data Analytics
10 3 (6.25%) Mentoring
Programming Languages
1 27 (56.25%) C#
2 20 (41.67%) Ruby
3 10 (20.83%) PHP
4 9 (18.75%) JavaScript
5 7 (14.58%) Java
5 7 (14.58%) SQL
6 3 (6.25%) C++
6 3 (6.25%) VB.NET
7 2 (4.17%) Smalltalk
8 1 (2.08%) Apple Swift
8 1 (2.08%) Go
8 1 (2.08%) Perl
8 1 (2.08%) Scala
8 1 (2.08%) T-SQL
Qualifications
1 1 (2.08%) ISEB
1 1 (2.08%) ISTQB
Quality Assurance & Compliance
1 4 (8.33%) QA
System Software
1 1 (2.08%) Docker
Systems Management
1 3 (6.25%) Puppet
2 1 (2.08%) Terraform
Vendors
1 6 (12.50%) Microsoft
2 3 (6.25%) Oracle
3 1 (2.08%) Google
3 1 (2.08%) Red Hat
3 1 (2.08%) SaltStack
3 1 (2.08%) Xamarin