Period
to 14 August 2018

The following table provides summary statistics for permanent job vacancies advertised in St Albans with a requirement for TDD skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited TDD over the 6 months to 14 August 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
14 Aug 2018
Same period 2017 Same period 2016
Rank 14 20 13
Rank change year-on-year +6 -7 -3
Permanent jobs citing TDD 102 50 52
As % of all permanent IT jobs advertised in St Albans 26.98% 16.50% 22.03%
As % of the Processes & Methodologies category 28.25% 19.08% 24.07%
Number of salaries quoted 101 50 52
St Albans median annual salary £52,500 £65,000 £65,000
Median salary % change year-on-year -19.23% - +18.18%
10th Percentile £35,000 £42,500 £32,500
90th Percentile £70,000 £72,500 £72,500
Hertfordshire median annual salary £50,000 £47,500 £55,000
% change year-on-year +5.26% -13.64% +15.79%

TDD is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in St Albans with a requirement for process or methodology skills.

All Process and Methodology Skills
St Albans
Permanent vacancies with a requirement for process or methodology skills 361 262 216
As % of all permanent IT jobs advertised in St Albans 95.50% 86.47% 91.53%
Number of salaries quoted 339 246 203
St Albans median annual salary £52,500 £52,500 £50,000
Median salary % change year-on-year - +5.00% +5.26%
10th Percentile £30,500 £26,000 £32,500
90th Percentile £76,250 £72,500 £72,500
Hertfordshire median annual salary £50,000 £47,100 £47,500
% change year-on-year +6.16% -0.84% +5.56%

TDD
Job Vacancy Trend in St Albans

Job postings citing TDD as a percentage of all IT jobs advertised in St Albans.

Job vacancy trend for TDD in St Albans

TDD
Salary Trend in St Albans

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

Salary trend for TDD in St Albans

TDD
Salary Histogram in St Albans

The salary distribution of IT jobs citing TDD in St Albans over the 6 months to 14 August 2018.

Salary histogram for TDD in St Albans

For the 6 months to 14 August 2018, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the St Albans region with a requirement for TDD.

1 95 (93.14%) C#
2 91 (89.22%) Agile Software Development
3 89 (87.25%) .NET
4 66 (64.71%) BDD
5 64 (62.75%) Continuous Integration
6 56 (54.90%) SQL Server
7 46 (45.10%) ASP.NET
7 46 (45.10%) MVC
8 45 (44.12%) ASP.NET MVC
9 41 (40.20%) Amazon AWS
10 37 (36.27%) Scrum
11 35 (34.31%) SQL
11 35 (34.31%) JavaScript
12 34 (33.33%) Microsoft Azure
12 34 (33.33%) ASP.NET Web API
13 33 (32.35%) Git (software)
14 32 (31.37%) RESTful
15 30 (29.41%) Dependency Injection
15 30 (29.41%) Web Application Development
15 30 (29.41%) Facebook
15 30 (29.41%) SQL Server 2016
15 30 (29.41%) ASP.NET MVC 5
15 30 (29.41%) Marketing
15 30 (29.41%) Advertising
16 29 (28.43%) SOLID
17 26 (25.49%) Greenfield Project
18 25 (24.51%) Degree
19 24 (23.53%) Computer Science
19 24 (23.53%) Velocity
19 24 (23.53%) CRM

TDD
Co-occurring IT Skills in St Albans 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:

Cloud Services
1 41 (40.20%) Amazon AWS
2 34 (33.33%) Microsoft Azure
Database & Business Intelligence
1 56 (54.90%) SQL Server
2 30 (29.41%) SQL Server 2016
3 8 (7.84%) NoSQL
4 6 (5.88%) Apache Cassandra
5 3 (2.94%) MySQL
5 3 (2.94%) PostgreSQL
5 3 (2.94%) RDBMS
5 3 (2.94%) Relational Database
Development Applications
1 33 (32.35%) Git (software)
2 9 (8.82%) TeamCity
3 3 (2.94%) Selenium
3 3 (2.94%) SpecFlow
3 3 (2.94%) WebDriver
4 1 (0.98%) Grunt
4 1 (0.98%) gulp
4 1 (0.98%) webpack
General
1 30 (29.41%) Advertising
1 30 (29.41%) Marketing
2 17 (16.67%) Back Office
3 6 (5.88%) Finance
Job Titles
1 93 (91.18%) Developer
2 72 (70.59%) .NET Developer
3 35 (34.31%) C# Developer
4 25 (24.51%) Software Developer
5 24 (23.53%) Full Stack Developer
6 23 (22.55%) .NET Software Developer
7 22 (21.57%) C# .NET Developer
7 22 (21.57%) C# Software Developer
8 12 (11.76%) Senior Developer
9 8 (7.84%) Senior .NET Developer
10 4 (3.92%) Java Developer
10 4 (3.92%) Senior C# Developer
11 3 (2.94%) .NET Software Engineer
11 3 (2.94%) Agile Developer
11 3 (2.94%) ASP.NET Developer
11 3 (2.94%) C# Software Engineer
11 3 (2.94%) JavaScript Developer
11 3 (2.94%) Software Engineer
11 3 (2.94%) Software Test Engineer
11 3 (2.94%) Test Engineer
Libraries, Frameworks & Software Standards
1 89 (87.25%) .NET
2 46 (45.10%) ASP.NET
3 45 (44.12%) ASP.NET MVC
4 34 (33.33%) ASP.NET Web API
5 32 (31.37%) RESTful
6 30 (29.41%) ASP.NET MVC 5
7 24 (23.53%) Velocity
8 17 (16.67%) Apache Flex
9 6 (5.88%) Akka
9 6 (5.88%) CSS
10 5 (4.90%) HTML
11 4 (3.92%) .NET Framework
11 4 (3.92%) AngularJS
12 3 (2.94%) .NET Core
12 3 (2.94%) React
12 3 (2.94%) Web Services
13 2 (1.96%) Redux
14 1 (0.98%) Aurelia
14 1 (0.98%) Sass
14 1 (0.98%) Vue.js
Miscellaneous
1 26 (25.49%) Greenfield Project
2 24 (23.53%) Computer Science
2 24 (23.53%) User Experience
3 5 (4.90%) Analytical Skills
4 4 (3.92%) Robotics
Operating Systems
1 1 (0.98%) Android
1 1 (0.98%) Apple iOS
Processes & Methodologies
1 91 (89.22%) Agile Software Development
2 66 (64.71%) BDD
3 64 (62.75%) Continuous Integration
4 46 (45.10%) MVC
5 37 (36.27%) Scrum
6 30 (29.41%) Dependency Injection
6 30 (29.41%) Web Application Development
7 29 (28.43%) SOLID
8 24 (23.53%) Continuous Delivery
8 24 (23.53%) CRM
9 17 (16.67%) Coaching
10 10 (9.80%) E-Commerce
10 10 (9.80%) Machine Learning
11 6 (5.88%) Artificial Intelligence
11 6 (5.88%) Decision-Making
11 6 (5.88%) Software Engineering
12 5 (4.90%) Problem-Solving
13 4 (3.92%) Domain-Driven Design
14 3 (2.94%) Web Design
14 3 (2.94%) Web Development
Programming Languages
1 95 (93.14%) C#
2 35 (34.31%) JavaScript
2 35 (34.31%) SQL
3 11 (10.78%) Java
4 6 (5.88%) C++
4 6 (5.88%) Scala
5 5 (4.90%) Java 8
6 2 (1.96%) TypeScript
7 1 (0.98%) ES6
7 1 (0.98%) PHP
7 1 (0.98%) PowerShell
7 1 (0.98%) Python
Qualifications
1 25 (24.51%) Degree
2 24 (23.53%) Computer Science Degree
System Software
1 2 (1.96%) Docker
Vendors
1 30 (29.41%) Facebook
2 3 (2.94%) Microsoft