Period
to 21 November 2018

The following table provides summary statistics for permanent job vacancies advertised in Hertfordshire 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 21 November 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
East of England > Hertfordshire
6 months to
21 Nov 2018
Same period 2017 Same period 2016
Rank 26 26 44
Rank change year-on-year 0 +18 -6
Permanent jobs citing TDD 320 386 244
As % of all permanent IT jobs advertised in Hertfordshire 8.25% 8.70% 5.44%
As % of the Processes & Methodologies category 9.13% 9.90% 6.03%
Number of salaries quoted 309 351 234
Hertfordshire median annual salary £52,500 £47,500 £48,750
Median salary % change year-on-year +10.53% -2.56% -2.50%
10th Percentile £35,000 £32,500 £31,000
90th Percentile £67,500 £72,500 £72,500
East of England median annual salary £50,000 £49,500 £46,614
% change year-on-year +1.01% +6.19% -1.87%

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 Hertfordshire with a requirement for process or methodology skills.

All Process and Methodology Skills
Hertfordshire
Permanent vacancies with a requirement for process or methodology skills 3,504 3,898 4,044
As % of all permanent IT jobs advertised in Hertfordshire 90.29% 87.87% 90.09%
Number of salaries quoted 2,708 3,287 3,340
Hertfordshire median annual salary £50,000 £47,500 £48,500
Median salary % change year-on-year +5.26% -2.06% +5.43%
10th Percentile £26,925 £27,250 £27,500
90th Percentile £75,000 £71,250 £72,500
East of England median annual salary £47,500 £47,000 £45,000
% change year-on-year +1.06% +4.44% -

TDD
Job Vacancy Trend in Hertfordshire

Job postings citing TDD as a percentage of all IT jobs advertised in Hertfordshire.

Job vacancy trend for TDD in Hertfordshire

TDD
Salary Trend in Hertfordshire

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing TDD in Hertfordshire.

Salary trend for TDD in Hertfordshire

TDD
Salary Histogram in Hertfordshire

The salary distribution of IT jobs citing TDD in Hertfordshire over the 6 months to 21 November 2018.

Salary histogram for TDD in Hertfordshire

TDD
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing TDD within the Hertfordshire region over the 6 months to 21 November 2018. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
Watford -2 89 £55,000 +22.22% 6
St Albans +8 88 £52,500 -19.23% 8
Hemel Hempstead -1 32 £45,000 -14.29% 2
Welwyn Garden City -9 15 £53,750 -10.42% 2
Hatfield +5 12 £57,500 -4.17% 1
Bishop's Stortford +5 11 £45,000 -25.00% 1
Letchworth -3 7 £34,000 -2.86%
Potters Bar - 7 £65,000 -
Borehamwood - 7 £38,000 - 1
Harpenden - 7 £45,000 - 1
Stevenage -5 6 £56,250 +25.00% 5
Welwyn - 5 £63,000 -
Hitchin +6 1 £40,000 +14.29%
Hoddesdon -4 1 £55,000 +83.33% 1
Broxbourne -12 1 £75,000 +66.67%
Berkhamsted - 1 £42,500 - 1
TDD
East of England

For the 6 months to 21 November 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 Hertfordshire region with a requirement for TDD.

1 289 (90.31%) Agile Software Development
2 197 (61.56%) C#
3 155 (48.44%) .NET
4 151 (47.19%) JavaScript
5 142 (44.38%) BDD
6 113 (35.31%) SQL
7 104 (32.50%) SQL Server
8 102 (31.88%) Scrum
8 102 (31.88%) MVC
9 95 (29.69%) Java
10 84 (26.25%) ASP.NET
10 84 (26.25%) CSS
11 82 (25.63%) Continuous Integration
12 76 (23.75%) RESTful
13 74 (23.13%) HTML
14 70 (21.88%) ASP.NET MVC
15 69 (21.56%) Amazon AWS
16 57 (17.81%) AngularJS
16 57 (17.81%) User Experience
16 57 (17.81%) Git (software)
17 55 (17.19%) Test Automation
17 55 (17.19%) ASP.NET Web API
18 53 (16.56%) Problem-Solving
19 52 (16.25%) Web Services
20 50 (15.63%) OO
20 50 (15.63%) Web Application Development
21 48 (15.00%) SOLID
21 48 (15.00%) jQuery
22 45 (14.06%) Spring
22 45 (14.06%) Greenfield Project

TDD
Co-occurring IT Skills in Hertfordshire 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 15 (4.69%) Tomcat
2 9 (2.81%) Oracle Service Bus
2 9 (2.81%) Oracle SOA Suite
3 8 (2.50%) SharePoint Server
4 6 (1.88%) JBoss
4 6 (1.88%) WebLogic
4 6 (1.88%) WebSphere
5 2 (0.63%) Elasticsearch
6 1 (0.31%) Confluence
6 1 (0.31%) GlassFish
Applications
1 5 (1.56%) Microsoft Excel
1 5 (1.56%) Microsoft Office
1 5 (1.56%) Microsoft PowerPoint
Cloud Services
1 69 (21.56%) Amazon AWS
2 39 (12.19%) Microsoft Azure
3 16 (5.00%) Amazon EC2
3 16 (5.00%) AWS Lambda
3 16 (5.00%) Serverless
4 7 (2.19%) npm
5 3 (0.94%) SaaS
6 2 (0.63%) Cloud Computing
6 2 (0.63%) Google Cloud Platform
Communications & Networking
1 10 (3.13%) HTTP
2 8 (2.50%) SSL
3 4 (1.25%) Internet
4 2 (0.63%) Skype
5 1 (0.31%) Wi-Fi
Database & Business Intelligence
1 104 (32.50%) SQL Server
2 44 (13.75%) SQL Server 2016
3 20 (6.25%) NoSQL
3 20 (6.25%) PostgreSQL
4 19 (5.94%) SQL Server Reporting Services
5 16 (5.00%) Amazon DynamoDB
5 16 (5.00%) Relational Database
6 13 (4.06%) RDBMS
6 13 (4.06%) SQL Server Integration Services
7 10 (3.13%) Apache Cassandra
8 9 (2.81%) Oracle Database
9 8 (2.50%) Oracle Database 12c
10 7 (2.19%) SQL Server 2012
11 6 (1.88%) SQL Server 2014
12 5 (1.56%) MongoDB
12 5 (1.56%) MySQL
13 4 (1.25%) Big Data
14 2 (0.63%) BigQuery
15 1 (0.31%) Couchbase
15 1 (0.31%) RavenDB
Development Applications
1 57 (17.81%) Git (software)
2 37 (11.56%) NUnit
3 33 (10.31%) Visual Studio
4 23 (7.19%) StyleCop
5 22 (6.88%) JIRA
6 16 (5.00%) Subversion
7 10 (3.13%) Maven
7 10 (3.13%) Octopus Deploy
7 10 (3.13%) webpack
8 8 (2.50%) gulp
8 8 (2.50%) Jasmine
9 7 (2.19%) Karma Test Runner
9 7 (2.19%) Team Foundation Server
10 6 (1.88%) Atlassian Bamboo
10 6 (1.88%) Moq
11 5 (1.56%) Cucumber
11 5 (1.56%) Selenium
12 4 (1.25%) Zephyr
13 3 (0.94%) Jenkins
13 3 (0.94%) JMeter
General
1 39 (12.19%) Finance
2 33 (10.31%) Retail
3 28 (8.75%) Back Office
4 22 (6.88%) Marketing
5 21 (6.56%) Advertising
6 15 (4.69%) Games
7 1 (0.31%) Automotive
7 1 (0.31%) Legal
Job Titles
1 265 (82.81%) Developer
2 135 (42.19%) .NET Developer
3 93 (29.06%) C# Developer
4 68 (21.25%) C# .NET Developer
5 52 (16.25%) Full Stack Developer
6 50 (15.63%) Java Developer
7 42 (13.13%) Software Developer
8 38 (11.88%) C# Software Developer
8 38 (11.88%) Senior Developer
9 30 (9.38%) .NET Software Developer
10 26 (8.13%) ASP.NET Developer
11 25 (7.81%) C# ASP.NET Developer
11 25 (7.81%) Data Migration Developer
12 23 (7.19%) Software Engineer
13 20 (6.25%) Angular Developer
14 19 (5.94%) JavaScript Developer
14 19 (5.94%) Oracle Developer
14 19 (5.94%) Oracle ETL Developer
14 19 (5.94%) PostgreSQL Developer
14 19 (5.94%) SQL Developer
Libraries, Frameworks & Software Standards
1 155 (48.44%) .NET
2 84 (26.25%) ASP.NET
2 84 (26.25%) CSS
3 76 (23.75%) RESTful
4 74 (23.13%) HTML
5 70 (21.88%) ASP.NET MVC
6 57 (17.81%) AngularJS
7 55 (17.19%) ASP.NET Web API
8 52 (16.25%) Web Services
9 48 (15.00%) jQuery
10 45 (14.06%) Spring
11 43 (13.44%) .NET Framework
11 43 (13.44%) XML
12 38 (11.88%) WCF
13 37 (11.56%) Entity Framework
14 35 (10.94%) React
15 30 (9.38%) Sass
16 27 (8.44%) ASP.NET MVC 5
17 26 (8.13%) Apache Flex
17 26 (8.13%) Node.js
Miscellaneous
1 57 (17.81%) User Experience
2 45 (14.06%) Greenfield Project
3 34 (10.63%) Analytical Skills
4 33 (10.31%) Computer Science
5 25 (7.81%) Reference Data
6 13 (4.06%) Mobile App
7 10 (3.13%) Fintech
7 10 (3.13%) Robotics
8 7 (2.19%) Media Streaming
9 3 (0.94%) BBC
9 3 (0.94%) Self-Motivation
9 3 (0.94%) Social Media
10 2 (0.63%) Algorithms
11 1 (0.31%) Digital TV
11 1 (0.31%) Internet of Things
Operating Systems
1 11 (3.44%) Linux
1 11 (3.44%) Unix
2 10 (3.13%) Windows
3 6 (1.88%) Windows Server
4 5 (1.56%) Android
5 1 (0.31%) Apple iOS
Processes & Methodologies
1 289 (90.31%) Agile Software Development
2 142 (44.38%) BDD
3 102 (31.88%) MVC
3 102 (31.88%) Scrum
4 82 (25.63%) Continuous Integration
5 55 (17.19%) Test Automation
6 53 (16.56%) Problem-Solving
7 50 (15.63%) OO
7 50 (15.63%) Web Application Development
8 48 (15.00%) SOLID
9 36 (11.25%) Continuous Delivery
10 33 (10.31%) Unit Testing
11 31 (9.69%) Coaching
11 31 (9.69%) Dependency Injection
11 31 (9.69%) Software Engineering
12 30 (9.38%) Scaled Agile Framework
13 29 (9.06%) Data Migration
13 29 (9.06%) Migration
14 26 (8.13%) Data Mapping
15 25 (7.81%) Front End Development
Programming Languages
1 197 (61.56%) C#
2 151 (47.19%) JavaScript
3 113 (35.31%) SQL
4 95 (29.69%) Java
5 38 (11.88%) Java 8
6 35 (10.94%) Scala
7 33 (10.31%) PL/SQL
8 22 (6.88%) C++
9 21 (6.56%) ES6
10 20 (6.25%) T-SQL
11 17 (5.31%) Python
12 14 (4.38%) Haskell
12 14 (4.38%) TypeScript
13 12 (3.75%) C
14 8 (2.50%) Ruby
15 6 (1.88%) ANSI SQL
15 6 (1.88%) Shell Script
16 4 (1.25%) XAML
17 2 (0.63%) Bash Shell
17 2 (0.63%) Kotlin
Qualifications
1 28 (8.75%) SC Cleared
1 28 (8.75%) Security Cleared
2 27 (8.44%) Degree
3 25 (7.81%) Computer Science Degree
4 4 (1.25%) ISTQB
4 4 (1.25%) ISTQB Foundation Certification
Quality Assurance & Compliance
1 25 (7.81%) Data Quality
2 13 (4.06%) QA
System Software
1 19 (5.94%) Docker
Systems Management
1 12 (3.75%) Kubernetes
2 2 (0.63%) Grafana
2 2 (0.63%) Icinga
2 2 (0.63%) Kibana
2 2 (0.63%) logstash
2 2 (0.63%) Nagios
2 2 (0.63%) Prometheus
2 2 (0.63%) ZABBIX
3 1 (0.31%) Ansible
Vendors
1 41 (12.81%) Oracle
2 30 (9.38%) Microsoft
3 24 (7.50%) Facebook
4 13 (4.06%) Talend
5 6 (1.88%) Sybase
6 5 (1.56%) Google
6 5 (1.56%) MicroStrategy
6 5 (1.56%) Xamarin
7 3 (0.94%) Apple
7 3 (0.94%) Sony
7 3 (0.94%) Yahoo!
8 2 (0.63%) Atlassian
8 2 (0.63%) PagerDuty
9 1 (0.31%) IBM