Period
to 24 February 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 24 February 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
24 Feb 2018
Same period 2017 Same period 2016
Rank 16 14 13
Rank change year-on-year -2 -1 -3
Permanent jobs citing TDD 75 74 77
As % of all permanent IT jobs advertised in St Albans 19.23% 17.96% 29.17%
As % of the Processes & Methodologies category 22.06% 19.89% 33.62%
Number of salaries quoted 68 74 77
St Albans median annual salary £55,000 £45,000 £60,000
Median salary % change year-on-year +22.22% -25.00% -
10th Percentile £35,000 £32,500 £32,500
90th Percentile £72,500 £72,500 £72,500
Hertfordshire median annual salary £47,500 £45,000 £55,000
% change year-on-year +5.56% -18.18% +10.00%

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 340 372 229
As % of all permanent IT jobs advertised in St Albans 87.18% 90.29% 86.74%
Number of salaries quoted 304 340 218
St Albans median annual salary £51,250 £52,500 £45,000
Median salary % change year-on-year -2.38% +16.67% -10.00%
10th Percentile £28,500 £32,750 £24,250
90th Percentile £75,175 £72,500 £72,500
Hertfordshire median annual salary £50,000 £50,000 £45,000
% change year-on-year - +11.11% -5.26%

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 24 February 2018.

Salary histogram for TDD in St Albans

For the 6 months to 24 February 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 65 (86.67%) Agile Software Development
2 53 (70.67%) C#
3 51 (68.00%) MVC
4 50 (66.67%) .NET
5 46 (61.33%) BDD
6 40 (53.33%) ASP.NET
7 38 (50.67%) SQL Server
8 37 (49.33%) OO
9 36 (48.00%) Amazon AWS
9 36 (48.00%) ASP.NET MVC
10 30 (40.00%) Git (software)
10 30 (40.00%) ASP.NET Web API
11 27 (36.00%) RESTful
12 25 (33.33%) Facebook
12 25 (33.33%) NoSQL
12 25 (33.33%) Web Application Development
12 25 (33.33%) Scrum
12 25 (33.33%) ASP.NET MVC 5
13 22 (29.33%) Node.js
14 20 (26.67%) JavaScript
15 18 (24.00%) SQL
15 18 (24.00%) CRM
15 18 (24.00%) AngularJS
15 18 (24.00%) Dependency Injection
15 18 (24.00%) SOLID
16 17 (22.67%) SQL Server 2014
16 17 (22.67%) Social Media
16 17 (22.67%) WCF
16 17 (22.67%) Apple
16 17 (22.67%) Sony

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 (1.33%) Tomcat
Applications
1 1 (1.33%) Photoshop
Business Applications
1 1 (1.33%) WebTrends
Cloud Services
1 36 (48.00%) Amazon AWS
2 16 (21.33%) Microsoft Azure
3 10 (13.33%) AWS Lambda
3 10 (13.33%) Serverless
4 1 (1.33%) Amazon EC2
Database & Business Intelligence
1 38 (50.67%) SQL Server
2 25 (33.33%) NoSQL
3 17 (22.67%) SQL Server 2014
4 10 (13.33%) SQL Server 2016
5 9 (12.00%) Relational Database
6 7 (9.33%) Apache Cassandra
7 2 (2.67%) SQL Server Integration Services
7 2 (2.67%) SQL Server Reporting Services
8 1 (1.33%) MongoDB
8 1 (1.33%) MySQL
8 1 (1.33%) PostgreSQL
8 1 (1.33%) RDBMS
Development Applications
1 30 (40.00%) Git (software)
2 8 (10.67%) TeamCity
3 6 (8.00%) Octopus Deploy
3 6 (8.00%) ReSharper
4 4 (5.33%) Jenkins
5 3 (4.00%) JIRA
6 2 (2.67%) Ant
6 2 (2.67%) Bitbucket
6 2 (2.67%) Gradle
6 2 (2.67%) Maven
7 1 (1.33%) Jasmine
7 1 (1.33%) Team Foundation Server
General
1 9 (12.00%) Marketing
2 8 (10.67%) Advertising
3 7 (9.33%) Finance
4 6 (8.00%) Retail
Job Titles
1 66 (88.00%) Developer
2 44 (58.67%) .NET Developer
3 17 (22.67%) Social Media Developer
4 10 (13.33%) Applications Developer
4 10 (13.33%) iOS Developer
5 9 (12.00%) Senior Developer
6 8 (10.67%) C# Developer
6 8 (10.67%) Full Stack Developer
7 6 (8.00%) C# .NET Developer
7 6 (8.00%) Java Developer
8 5 (6.67%) Senior Java Developer
9 4 (5.33%) .NET Software Developer
9 4 (5.33%) Software Developer
10 3 (4.00%) Angular Developer
10 3 (4.00%) ASP.NET MVC Developer
10 3 (4.00%) Development Team Leader
10 3 (4.00%) Front End Developer (Client-Side Developer)
10 3 (4.00%) Senior .NET Developer
10 3 (4.00%) Senior Full Stack Developer
11 2 (2.67%) Azure Developer
Libraries, Frameworks & Software Standards
1 50 (66.67%) .NET
2 40 (53.33%) ASP.NET
3 36 (48.00%) ASP.NET MVC
4 30 (40.00%) ASP.NET Web API
5 27 (36.00%) RESTful
6 25 (33.33%) ASP.NET MVC 5
7 22 (29.33%) Node.js
8 18 (24.00%) AngularJS
9 17 (22.67%) WCF
9 17 (22.67%) Web Services
10 11 (14.67%) REST
11 10 (13.33%) Core Data
11 10 (13.33%) Django
11 10 (13.33%) JSON
12 9 (12.00%) .NET Framework
12 9 (12.00%) Entity Framework
13 8 (10.67%) Velocity
14 7 (9.33%) Akka
14 7 (9.33%) HTML
15 6 (8.00%) CSS
Miscellaneous
1 17 (22.67%) BBC
1 17 (22.67%) Social Media
2 10 (13.33%) Algorithms
2 10 (13.33%) User Experience
3 8 (10.67%) Computer Science
4 2 (2.67%) Data Structures
4 2 (2.67%) Greenfield Project
5 1 (1.33%) Analytical Skills
Operating Systems
1 10 (13.33%) Apple iOS
2 5 (6.67%) Windows
3 1 (1.33%) Linux
Processes & Methodologies
1 65 (86.67%) Agile Software Development
2 51 (68.00%) MVC
3 46 (61.33%) BDD
4 37 (49.33%) OO
5 25 (33.33%) Scrum
5 25 (33.33%) Web Application Development
6 18 (24.00%) CRM
6 18 (24.00%) Dependency Injection
6 18 (24.00%) SOLID
7 16 (21.33%) Continuous Integration
8 12 (16.00%) OOD
8 12 (16.00%) OOP
9 11 (14.67%) Concurrent Programming
10 10 (13.33%) Auto-Scaling
10 10 (13.33%) Continuous Deployment
10 10 (13.33%) Domain Models
10 10 (13.33%) iOS Development
10 10 (13.33%) Kanban
10 10 (13.33%) Memory Management
10 10 (13.33%) Test Automation
Programming Languages
1 53 (70.67%) C#
2 20 (26.67%) JavaScript
3 18 (24.00%) SQL
4 17 (22.67%) Ruby
5 13 (17.33%) Java
6 10 (13.33%) Apple Swift
7 9 (12.00%) T-SQL
8 7 (9.33%) Scala
9 6 (8.00%) C++
10 3 (4.00%) PowerShell
10 3 (4.00%) Python
11 2 (2.67%) Go
11 2 (2.67%) Rust
12 1 (1.33%) ES6
12 1 (1.33%) TypeScript
Qualifications
1 8 (10.67%) Computer Science Degree
1 8 (10.67%) Degree
Systems Management
1 10 (13.33%) Single Sign-On
2 2 (2.67%) Ansible
2 2 (2.67%) Opscode Chef
2 2 (2.67%) Puppet
Vendors
1 25 (33.33%) Facebook
2 17 (22.67%) Apple
2 17 (22.67%) Google
2 17 (22.67%) Sony
2 17 (22.67%) Yahoo!
3 4 (5.33%) Microsoft
4 2 (2.67%) New Relic