Period
to 19 January 2019

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 19 January 2019 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
19 Jan 2019
Same period 2018 Same period 2017
Rank 9 16 16
Rank change year-on-year +7 0 -4
Permanent jobs citing TDD 65 65 67
As % of all permanent IT jobs advertised in St Albans 24.25% 17.86% 16.54%
As % of the Processes & Methodologies category 26.42% 19.52% 18.61%
Number of salaries quoted 65 61 67
St Albans median annual salary £52,500 £65,000 £45,000
Median salary % change year-on-year -19.23% +44.44% -25.00%
10th Percentile £35,000 £42,500 £32,500
90th Percentile £67,500 £72,500 £72,500
Hertfordshire median annual salary £52,500 £50,000 £45,000
% change year-on-year +5.00% +11.11% -14.29%

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 246 333 360
As % of all permanent IT jobs advertised in St Albans 91.79% 91.48% 88.89%
Number of salaries quoted 222 298 330
St Albans median annual salary £52,500 £50,000 £52,500
Median salary % change year-on-year +5.00% -4.76% +16.67%
10th Percentile £26,750 £28,500 £32,500
90th Percentile £73,500 £72,500 £72,500
Hertfordshire median annual salary £50,000 £50,000 £50,000

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 19 January 2019.

Salary histogram for TDD in St Albans

For the 6 months to 19 January 2019, 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 65 (100.00%) Agile Software Development
2 57 (87.69%) C#
3 51 (78.46%) .NET
4 36 (55.38%) BDD
5 34 (52.31%) SQL Server
6 31 (47.69%) Continuous Integration
7 29 (44.62%) JavaScript
8 28 (43.08%) Amazon AWS
9 26 (40.00%) Microsoft Azure
10 24 (36.92%) SQL
11 20 (30.77%) Continuous Delivery
11 20 (30.77%) Greenfield Project
12 19 (29.23%) User Experience
12 19 (29.23%) MVC
12 19 (29.23%) Scrum
13 18 (27.69%) ASP.NET
13 18 (27.69%) Git (software)
13 18 (27.69%) ASP.NET MVC
13 18 (27.69%) SOLID
14 17 (26.15%) Computer Science Degree
14 17 (26.15%) Computer Science
14 17 (26.15%) Velocity
14 17 (26.15%) Degree
14 17 (26.15%) Back Office
14 17 (26.15%) CRM
15 15 (23.08%) Apache Flex
15 15 (23.08%) RESTful
15 15 (23.08%) Web Application Development
15 15 (23.08%) Coaching
16 14 (21.54%) ASP.NET Web API

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:

Application Platforms
1 1 (1.54%) Confluence
Cloud Services
1 28 (43.08%) Amazon AWS
2 26 (40.00%) Microsoft Azure
3 4 (6.15%) Amazon EC2
3 4 (6.15%) AWS Lambda
3 4 (6.15%) Serverless
Database & Business Intelligence
1 34 (52.31%) SQL Server
2 13 (20.00%) SQL Server 2016
3 7 (10.77%) NoSQL
4 6 (9.23%) Apache Cassandra
5 4 (6.15%) Amazon DynamoDB
5 4 (6.15%) SQL Server Reporting Services
6 3 (4.62%) SQL Server Integration Services
7 1 (1.54%) MySQL
7 1 (1.54%) PostgreSQL
7 1 (1.54%) QlikView
7 1 (1.54%) RDBMS
7 1 (1.54%) Relational Database
Development Applications
1 18 (27.69%) Git (software)
2 1 (1.54%) Atlassian Bamboo
2 1 (1.54%) Jenkins
2 1 (1.54%) JIRA
2 1 (1.54%) TeamCity
General
1 17 (26.15%) Back Office
2 13 (20.00%) Advertising
2 13 (20.00%) Marketing
3 2 (3.08%) Finance
Job Titles
1 55 (84.62%) Developer
2 47 (72.31%) .NET Developer
3 22 (33.85%) C# Developer
4 20 (30.77%) .NET Software Developer
4 20 (30.77%) Software Developer
5 17 (26.15%) C# .NET Developer
5 17 (26.15%) C# Software Developer
5 17 (26.15%) Full Stack Developer
6 12 (18.46%) Senior Developer
7 8 (12.31%) Senior .NET Developer
8 4 (6.15%) Development Engineer
8 4 (6.15%) Senior C# Developer
8 4 (6.15%) Software Development Engineer
8 4 (6.15%) Software Engineer
8 4 (6.15%) Software Test Engineer
8 4 (6.15%) Test Development Engineer
8 4 (6.15%) Test Engineer
9 2 (3.08%) Azure Developer
9 2 (3.08%) Front End Developer (Client-Side Developer)
10 1 (1.54%) JavaScript Developer
Libraries, Frameworks & Software Standards
1 51 (78.46%) .NET
2 18 (27.69%) ASP.NET
2 18 (27.69%) ASP.NET MVC
3 17 (26.15%) Velocity
4 15 (23.08%) Apache Flex
4 15 (23.08%) RESTful
5 14 (21.54%) ASP.NET Web API
6 13 (20.00%) ASP.NET MVC 5
7 9 (13.85%) AngularJS
8 6 (9.23%) Akka
9 5 (7.69%) CSS
10 4 (6.15%) .NET Framework
10 4 (6.15%) HTML
10 4 (6.15%) React
11 3 (4.62%) Entity Framework
12 2 (3.08%) REST
12 2 (3.08%) Web Services
13 1 (1.54%) .NET Core
13 1 (1.54%) Angular 2
13 1 (1.54%) D3.js
Miscellaneous
1 20 (30.77%) Greenfield Project
2 19 (29.23%) User Experience
3 1 (1.54%) Analytical Skills
Operating Systems
1 3 (4.62%) Windows
Processes & Methodologies
1 65 (100.00%) Agile Software Development
2 36 (55.38%) BDD
3 31 (47.69%) Continuous Integration
4 20 (30.77%) Continuous Delivery
5 19 (29.23%) MVC
5 19 (29.23%) Scrum
6 18 (27.69%) SOLID
7 17 (26.15%) Computer Science
7 17 (26.15%) CRM
8 15 (23.08%) Coaching
8 15 (23.08%) Web Application Development
9 13 (20.00%) Dependency Injection
10 11 (16.92%) Decision-Making
11 7 (10.77%) OO
12 6 (9.23%) Artificial Intelligence
12 6 (9.23%) Machine Learning
13 5 (7.69%) Unit Testing
14 4 (6.15%) SDET
14 4 (6.15%) Test Automation
14 4 (6.15%) Workflow
Programming Languages
1 57 (87.69%) C#
2 29 (44.62%) JavaScript
3 24 (36.92%) SQL
4 11 (16.92%) Java
5 10 (15.38%) C++
5 10 (15.38%) Scala
6 5 (7.69%) Python
7 4 (6.15%) C
8 3 (4.62%) T-SQL
9 2 (3.08%) TypeScript
Qualifications
1 17 (26.15%) Computer Science Degree
1 17 (26.15%) Degree
2 1 (1.54%) Postgraduate
Vendors
1 13 (20.00%) Facebook
2 2 (3.08%) Microsoft
3 1 (1.54%) Tableau