Period
to 26 May 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 26 May 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
26 May 2018
Same period 2017 Same period 2016
Rank 15 18 16
Rank change year-on-year +3 -2 -7
Permanent jobs citing TDD 93 59 55
As % of all permanent IT jobs advertised in St Albans 22.25% 18.32% 25.46%
As % of the Processes & Methodologies category 24.47% 19.73% 28.06%
Number of salaries quoted 90 59 55
St Albans median annual salary £52,500 £55,000 £65,000
Median salary % change year-on-year -4.55% -15.38% +8.33%
10th Percentile £35,000 £35,000 £32,500
90th Percentile £72,500 £72,500 £72,500
Hertfordshire median annual salary £50,000 £45,000 £52,500
% change year-on-year +11.11% -14.29% +5.00%

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 380 299 196
As % of all permanent IT jobs advertised in St Albans 90.91% 92.86% 90.74%
Number of salaries quoted 364 277 183
St Albans median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -5.00%
10th Percentile £29,750 £32,500 £25,150
90th Percentile £76,250 £72,500 £72,500
Hertfordshire median annual salary £52,500 £47,500 £46,500
% change year-on-year +10.53% +2.15% +3.33%

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 26 May 2018.

Salary histogram for TDD in St Albans

For the 6 months to 26 May 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 79 (84.95%) C#
2 77 (82.80%) Agile Software Development
3 72 (77.42%) .NET
4 56 (60.22%) BDD
5 55 (59.14%) Continuous Integration
6 53 (56.99%) MVC
7 49 (52.69%) SQL Server
7 49 (52.69%) Amazon AWS
8 48 (51.61%) ASP.NET
9 47 (50.54%) ASP.NET MVC
10 40 (43.01%) SQL
11 39 (41.94%) Scrum
12 36 (38.71%) Microsoft Azure
13 32 (34.41%) Git (software)
14 30 (32.26%) Dependency Injection
15 28 (30.11%) ASP.NET Web API
16 27 (29.03%) RESTful
16 27 (29.03%) SQL Server 2016
17 26 (27.96%) JavaScript
18 25 (26.88%) Advertising
18 25 (26.88%) CRM
18 25 (26.88%) Marketing
18 25 (26.88%) Facebook
18 25 (26.88%) Web Application Development
18 25 (26.88%) ASP.NET MVC 5
19 23 (24.73%) SOLID
20 21 (22.58%) Degree
21 20 (21.51%) Computer Science
21 20 (21.51%) Velocity
21 20 (21.51%) Continuous Delivery

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:

Applications
1 1 (1.08%) Photoshop
Business Applications
1 1 (1.08%) WebTrends
Cloud Services
1 49 (52.69%) Amazon AWS
2 36 (38.71%) Microsoft Azure
3 5 (5.38%) AWS Lambda
3 5 (5.38%) Serverless
Database & Business Intelligence
1 49 (52.69%) SQL Server
2 27 (29.03%) SQL Server 2016
3 11 (11.83%) NoSQL
4 10 (10.75%) Apache Cassandra
5 8 (8.60%) Relational Database
6 2 (2.15%) MySQL
6 2 (2.15%) PostgreSQL
6 2 (2.15%) RDBMS
6 2 (2.15%) SQL Server Integration Services
6 2 (2.15%) SQL Server Reporting Services
Development Applications
1 32 (34.41%) Git (software)
2 15 (16.13%) TeamCity
3 6 (6.45%) Octopus Deploy
3 6 (6.45%) ReSharper
4 3 (3.23%) Selenium
4 3 (3.23%) SpecFlow
4 3 (3.23%) WebDriver
5 2 (2.15%) Bitbucket
6 1 (1.08%) Grunt
6 1 (1.08%) gulp
6 1 (1.08%) webpack
General
1 25 (26.88%) Advertising
1 25 (26.88%) Marketing
2 5 (5.38%) Finance
3 3 (3.23%) Retail
Job Titles
1 80 (86.02%) Developer
2 55 (59.14%) .NET Developer
3 28 (30.11%) C# Developer
4 20 (21.51%) Full Stack Developer
5 17 (18.28%) C# .NET Developer
6 16 (17.20%) Software Developer
7 14 (15.05%) .NET Software Developer
8 11 (11.83%) C# Software Developer
9 6 (6.45%) Senior Developer
10 5 (5.38%) Applications Developer
10 5 (5.38%) iOS Developer
11 4 (4.30%) ASP.NET MVC Developer
11 4 (4.30%) Java Developer
12 3 (3.23%) Angular Developer
12 3 (3.23%) C# Software Engineer
12 3 (3.23%) JavaScript Developer
12 3 (3.23%) Senior .NET Developer
12 3 (3.23%) Software Engineer
12 3 (3.23%) Software Test Engineer
12 3 (3.23%) Test Engineer
Libraries, Frameworks & Software Standards
1 72 (77.42%) .NET
2 48 (51.61%) ASP.NET
3 47 (50.54%) ASP.NET MVC
4 28 (30.11%) ASP.NET Web API
5 27 (29.03%) RESTful
6 25 (26.88%) ASP.NET MVC 5
7 20 (21.51%) Velocity
8 13 (13.98%) .NET Framework
8 13 (13.98%) AngularJS
9 10 (10.75%) Akka
9 10 (10.75%) Entity Framework
10 7 (7.53%) Web Services
11 5 (5.38%) Core Data
11 5 (5.38%) CSS
11 5 (5.38%) Django
11 5 (5.38%) JSON
11 5 (5.38%) REST
12 4 (4.30%) HTML
12 4 (4.30%) React
13 3 (3.23%) Vert.x
Miscellaneous
1 20 (21.51%) Computer Science
2 18 (19.35%) User Experience
3 11 (11.83%) Greenfield Project
4 5 (5.38%) Algorithms
5 4 (4.30%) Analytical Skills
6 1 (1.08%) Robotics
Operating Systems
1 6 (6.45%) Apple iOS
2 5 (5.38%) Windows
3 1 (1.08%) Android
Processes & Methodologies
1 77 (82.80%) Agile Software Development
2 56 (60.22%) BDD
3 55 (59.14%) Continuous Integration
4 53 (56.99%) MVC
5 39 (41.94%) Scrum
6 30 (32.26%) Dependency Injection
7 25 (26.88%) CRM
7 25 (26.88%) Web Application Development
8 23 (24.73%) SOLID
9 20 (21.51%) Continuous Delivery
10 15 (16.13%) Artificial Intelligence
11 11 (11.83%) E-Commerce
11 11 (11.83%) Machine Learning
12 10 (10.75%) OO
13 8 (8.60%) OOP
13 8 (8.60%) Software Engineering
13 8 (8.60%) Test Automation
14 6 (6.45%) Concurrent Programming
14 6 (6.45%) Kanban
14 6 (6.45%) Web Design
Programming Languages
1 79 (84.95%) C#
2 40 (43.01%) SQL
3 26 (27.96%) JavaScript
4 15 (16.13%) Java
5 10 (10.75%) Scala
6 9 (9.68%) C++
6 9 (9.68%) T-SQL
7 5 (5.38%) Apple Swift
8 2 (2.15%) Java 8
9 1 (1.08%) ES6
9 1 (1.08%) PHP
9 1 (1.08%) PowerShell
9 1 (1.08%) Python
9 1 (1.08%) TypeScript
Qualifications
1 21 (22.58%) Degree
2 20 (21.51%) Computer Science Degree
System Software
1 2 (2.15%) Docker
Systems Management
1 5 (5.38%) Single Sign-On
Vendors
1 25 (26.88%) Facebook
2 2 (2.15%) Microsoft
2 2 (2.15%) New Relic