Period
to 24 November 2017

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 November 2017 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > St Albans
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 17 17 11
Rank change year-on-year 0 -6 0
Permanent jobs citing TDD 60 69 101
As % of all permanent IT jobs advertised in St Albans 17.80% 17.25% 33.67%
As % of the Processes & Methodologies category 21.43% 19.55% 37.55%
Number of salaries quoted 56 69 101
St Albans median annual salary £65,000 £37,500 £60,000
Median salary % change year-on-year +73.33% -37.50% +33.33%
10th Percentile £43,750 £31,000 £32,500
90th Percentile £72,500 £72,500 £72,500
Hertfordshire median annual salary £47,500 £50,000 £50,000
% change year-on-year -5.00% - +5.26%

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 280 353 269
As % of all permanent IT jobs advertised in St Albans 83.09% 88.25% 89.67%
Number of salaries quoted 246 329 258
St Albans median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -
10th Percentile £28,500 £32,500 £25,000
90th Percentile £72,500 £72,500 £72,500
Hertfordshire median annual salary £47,500 £50,000 £47,500
% change year-on-year -5.00% +5.26% +3.26%

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 November 2017.

Salary histogram for TDD in St Albans

For the 6 months to 24 November 2017, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the St Albans region with a requirement for TDD.

1 53 (88.33%) MVC
2 49 (81.67%) .NET
2 49 (81.67%) Agile Software Development
3 47 (78.33%) ASP.NET
4 46 (76.67%) BDD
4 46 (76.67%) ASP.NET Web API
5 42 (70.00%) OO
6 41 (68.33%) C#
7 38 (63.33%) ASP.NET MVC
8 37 (61.67%) WCF
8 37 (61.67%) ASP.NET MVC 5
9 35 (58.33%) Node.js
9 35 (58.33%) SQL Server
10 33 (55.00%) Git (software)
11 30 (50.00%) RESTful
11 30 (50.00%) Social Media
11 30 (50.00%) Yahoo!
11 30 (50.00%) Google
11 30 (50.00%) NoSQL
11 30 (50.00%) Facebook
11 30 (50.00%) Web Application Development
11 30 (50.00%) BBC
11 30 (50.00%) Sony
11 30 (50.00%) Apple
11 30 (50.00%) Ruby
11 30 (50.00%) SQL Server 2014
12 21 (35.00%) JavaScript
13 20 (33.33%) AngularJS
14 19 (31.67%) Amazon AWS
15 16 (26.67%) Web Services

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 6 (10.00%) CMS
1 6 (10.00%) Elasticsearch
1 6 (10.00%) Umbraco
2 1 (1.67%) Tomcat
Cloud Services
1 19 (31.67%) Amazon AWS
2 5 (8.33%) AWS Lambda
2 5 (8.33%) Serverless
3 3 (5.00%) Microsoft Azure
4 1 (1.67%) Amazon EC2
Database & Business Intelligence
1 35 (58.33%) SQL Server
2 30 (50.00%) NoSQL
2 30 (50.00%) SQL Server 2014
3 6 (10.00%) Redis
4 3 (5.00%) Relational Database
5 1 (1.67%) Apache Cassandra
5 1 (1.67%) MongoDB
Development Applications
1 33 (55.00%) Git (software)
2 7 (11.67%) NUnit
3 5 (8.33%) Jenkins
4 4 (6.67%) JIRA
5 3 (5.00%) Ant
5 3 (5.00%) Gradle
5 3 (5.00%) Maven
5 3 (5.00%) TeamCity
6 2 (3.33%) Jasmine
7 1 (1.67%) Team Foundation Server
General
1 11 (18.33%) Finance
2 6 (10.00%) Retail
3 1 (1.67%) Marketing
Job Titles
1 56 (93.33%) Developer
2 41 (68.33%) .NET Developer
3 30 (50.00%) Social Media Developer
4 10 (16.67%) Senior Developer
5 7 (11.67%) .NET Software Developer
5 7 (11.67%) C# Developer
6 5 (8.33%) Applications Developer
6 5 (8.33%) C# .NET Developer
6 5 (8.33%) iOS Developer
6 5 (8.33%) Senior C# Developer
6 5 (8.33%) Software Developer
7 4 (6.67%) .NET Development Team Leader
7 4 (6.67%) .NET Team Leader
7 4 (6.67%) Development Team Leader
7 4 (6.67%) Java Developer
7 4 (6.67%) Senior .NET Developer
7 4 (6.67%) Senior Java Developer
7 4 (6.67%) Senior Systems Developer
7 4 (6.67%) Software Development Team Leader
7 4 (6.67%) Team Leader
Libraries, Frameworks & Software Standards
1 49 (81.67%) .NET
2 47 (78.33%) ASP.NET
3 46 (76.67%) ASP.NET Web API
4 38 (63.33%) ASP.NET MVC
5 37 (61.67%) ASP.NET MVC 5
5 37 (61.67%) WCF
6 35 (58.33%) Node.js
7 30 (50.00%) RESTful
8 20 (33.33%) AngularJS
9 16 (26.67%) Web Services
10 12 (20.00%) HTML
10 12 (20.00%) jQuery
11 11 (18.33%) CSS
12 7 (11.67%) Kafka
12 7 (11.67%) RabbitMQ
12 7 (11.67%) REST
12 7 (11.67%) SignalR
13 6 (10.00%) HTML5
14 5 (8.33%) Django
14 5 (8.33%) JSON
Miscellaneous
1 30 (50.00%) BBC
1 30 (50.00%) Social Media
2 5 (8.33%) Algorithms
2 5 (8.33%) User Experience
3 3 (5.00%) Data Structures
Operating Systems
1 5 (8.33%) Apple iOS
2 1 (1.67%) Linux
Processes & Methodologies
1 53 (88.33%) MVC
2 49 (81.67%) Agile Software Development
3 46 (76.67%) BDD
4 42 (70.00%) OO
5 30 (50.00%) Web Application Development
6 12 (20.00%) Scrum
6 12 (20.00%) Unit Testing
7 9 (15.00%) OOD
8 8 (13.33%) Web Development
9 7 (11.67%) Low Latency
9 7 (11.67%) Multithreading
9 7 (11.67%) Software Engineering
10 6 (10.00%) Mathematics
10 6 (10.00%) Mobile Development
11 5 (8.33%) ATDD
11 5 (8.33%) CRM
11 5 (8.33%) Dependency Injection
11 5 (8.33%) Kanban
11 5 (8.33%) Memory Management
11 5 (8.33%) Test Automation
Programming Languages
1 41 (68.33%) C#
2 30 (50.00%) Ruby
3 21 (35.00%) JavaScript
4 8 (13.33%) PowerShell
4 8 (13.33%) Python
5 6 (10.00%) TypeScript
6 5 (8.33%) Apple Swift
7 4 (6.67%) Java
8 3 (5.00%) Go
8 3 (5.00%) Rust
9 1 (1.67%) ES6
9 1 (1.67%) SQL
Qualifications
1 6 (10.00%) Degree
Systems Management
1 3 (5.00%) Ansible
1 3 (5.00%) Opscode Chef
1 3 (5.00%) Puppet
Vendors
1 30 (50.00%) Apple
1 30 (50.00%) Facebook
1 30 (50.00%) Google
1 30 (50.00%) Sony
1 30 (50.00%) Yahoo!
2 11 (18.33%) Microsoft