Period
to 16 October 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 16 October 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
16 Oct 2018
Same period 2017 Same period 2016
Rank 10 16 15
Rank change year-on-year +6 -1 -5
Permanent jobs citing TDD 94 53 70
As % of all permanent IT jobs advertised in St Albans 25.90% 16.51% 20.29%
As % of the Processes & Methodologies category 28.23% 19.63% 22.80%
Number of salaries quoted 94 51 70
St Albans median annual salary £52,500 £65,000 £41,250
Median salary % change year-on-year -19.23% +57.58% -25.00%
10th Percentile £35,000 £48,750 £31,000
90th Percentile £75,250 £72,500 £72,500
Hertfordshire median annual salary £50,000 £48,750 £47,500
% change year-on-year +2.56% +2.63% -

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 333 270 307
As % of all permanent IT jobs advertised in St Albans 91.74% 84.11% 88.99%
Number of salaries quoted 297 248 293
St Albans median annual salary £52,500 £52,500 £50,000
Median salary % change year-on-year - +5.00% +5.26%
10th Percentile £32,500 £27,500 £32,500
90th Percentile £76,250 £72,500 £72,500
Hertfordshire median annual salary £50,000 £47,500 £47,500
% change year-on-year +5.26% - +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 16 October 2018.

Salary histogram for TDD in St Albans

For the 6 months to 16 October 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 91 (96.81%) Agile Software Development
2 87 (92.55%) C#
3 80 (85.11%) .NET
4 58 (61.70%) BDD
5 53 (56.38%) Continuous Integration
6 52 (55.32%) SQL Server
7 35 (37.23%) Amazon AWS
8 32 (34.04%) MVC
8 32 (34.04%) ASP.NET
8 32 (34.04%) JavaScript
8 32 (34.04%) ASP.NET MVC
8 32 (34.04%) Microsoft Azure
9 29 (30.85%) SOLID
9 29 (30.85%) Scrum
10 28 (29.79%) SQL
10 28 (29.79%) Greenfield Project
11 27 (28.72%) ASP.NET Web API
11 27 (28.72%) RESTful
11 27 (28.72%) Git (software)
12 26 (27.66%) Marketing
12 26 (27.66%) Advertising
12 26 (27.66%) SQL Server 2016
12 26 (27.66%) ASP.NET MVC 5
12 26 (27.66%) Dependency Injection
12 26 (27.66%) Facebook
12 26 (27.66%) Web Application Development
13 25 (26.60%) Coaching
13 25 (26.60%) Back Office
13 25 (26.60%) Apache Flex
14 24 (25.53%) Computer Science

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 35 (37.23%) Amazon AWS
2 32 (34.04%) Microsoft Azure
3 1 (1.06%) Amazon EC2
3 1 (1.06%) AWS Lambda
3 1 (1.06%) Serverless
Database & Business Intelligence
1 52 (55.32%) SQL Server
2 26 (27.66%) SQL Server 2016
3 8 (8.51%) NoSQL
4 7 (7.45%) Apache Cassandra
5 2 (2.13%) MySQL
5 2 (2.13%) PostgreSQL
5 2 (2.13%) RDBMS
5 2 (2.13%) Relational Database
6 1 (1.06%) Amazon DynamoDB
Development Applications
1 27 (28.72%) Git (software)
2 3 (3.19%) TeamCity
3 1 (1.06%) Selenium
3 1 (1.06%) SpecFlow
3 1 (1.06%) WebDriver
General
1 26 (27.66%) Advertising
1 26 (27.66%) Marketing
2 25 (26.60%) Back Office
3 2 (2.13%) Finance
Job Titles
1 85 (90.43%) Developer
2 72 (76.60%) .NET Developer
3 33 (35.11%) C# Developer
4 24 (25.53%) .NET Software Developer
4 24 (25.53%) C# .NET Developer
4 24 (25.53%) C# Software Developer
4 24 (25.53%) Full Stack Developer
4 24 (25.53%) Software Developer
5 18 (19.15%) Senior Developer
6 12 (12.77%) Senior .NET Developer
7 6 (6.38%) Senior C# Developer
8 4 (4.26%) Java Developer
9 2 (2.13%) Agile .NET Developer
9 2 (2.13%) Agile Developer
9 2 (2.13%) ASP.NET Developer
9 2 (2.13%) ASP.NET MVC Developer
9 2 (2.13%) Azure Developer
9 2 (2.13%) Software Engineer
9 2 (2.13%) Software Test Engineer
9 2 (2.13%) Test Engineer
Libraries, Frameworks & Software Standards
1 80 (85.11%) .NET
2 32 (34.04%) ASP.NET
2 32 (34.04%) ASP.NET MVC
3 27 (28.72%) ASP.NET Web API
3 27 (28.72%) RESTful
4 26 (27.66%) ASP.NET MVC 5
5 25 (26.60%) Apache Flex
6 24 (25.53%) Velocity
7 7 (7.45%) Akka
8 3 (3.19%) CSS
8 3 (3.19%) HTML
9 1 (1.06%) .NET Core
9 1 (1.06%) .NET Framework
9 1 (1.06%) AngularJS
9 1 (1.06%) Web Services
Miscellaneous
1 28 (29.79%) Greenfield Project
2 24 (25.53%) Computer Science
2 24 (25.53%) User Experience
3 4 (4.26%) Robotics
4 2 (2.13%) Analytical Skills
Processes & Methodologies
1 91 (96.81%) Agile Software Development
2 58 (61.70%) BDD
3 53 (56.38%) Continuous Integration
4 32 (34.04%) MVC
5 29 (30.85%) Scrum
5 29 (30.85%) SOLID
6 26 (27.66%) Dependency Injection
6 26 (27.66%) Web Application Development
7 25 (26.60%) Coaching
8 24 (25.53%) Continuous Delivery
8 24 (25.53%) CRM
9 11 (11.70%) Decision-Making
9 11 (11.70%) Machine Learning
10 7 (7.45%) Artificial Intelligence
11 6 (6.38%) E-Commerce
12 4 (4.26%) Domain-Driven Design
13 3 (3.19%) Software Engineering
14 2 (2.13%) Responsive Web Design
14 2 (2.13%) Test Automation
14 2 (2.13%) Web Design
Programming Languages
1 87 (92.55%) C#
2 32 (34.04%) JavaScript
3 28 (29.79%) SQL
4 12 (12.77%) Java
5 8 (8.51%) C++
5 8 (8.51%) Scala
6 4 (4.26%) Java 8
7 1 (1.06%) C
7 1 (1.06%) Python
7 1 (1.06%) TypeScript
Qualifications
1 24 (25.53%) Computer Science Degree
1 24 (25.53%) Degree
Vendors
1 26 (27.66%) Facebook
2 1 (1.06%) Microsoft