Period
to 25 August 2019

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 25 August 2019 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
East of England > Hertfordshire
6 months to
25 Aug 2019
Same period 2018 Same period 2017
Rank 49 27 28
Rank change year-on-year -22 +1 +35
Permanent jobs citing TDD 132 350 358
As % of all permanent IT jobs advertised in Hertfordshire 4.96% 8.23% 8.69%
As % of the Processes & Methodologies category 5.69% 9.07% 9.64%
Number of salaries quoted 89 327 325
Hertfordshire median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -13.64%
10th Percentile £41,250 £35,000 £32,900
90th Percentile £73,750 £70,000 £72,500
East of England median annual salary £52,500 £50,000 £49,500
% change year-on-year +5.00% +1.01% +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 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 2,319 3,857 3,715
As % of all permanent IT jobs advertised in Hertfordshire 87.11% 90.71% 90.17%
Number of salaries quoted 1,696 3,014 3,125
Hertfordshire median annual salary £50,000 £50,000 £45,000
Median salary % change year-on-year - +11.11% -5.26%
10th Percentile £27,500 £27,500 £27,100
90th Percentile £75,250 £73,925 £71,250
East of England median annual salary £48,875 £47,500 £45,000
% change year-on-year +2.89% +5.56% -

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 25 August 2019.

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 25 August 2019. 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 -3 31 £42,500 -19.05% 2
St Albans -5 25 £52,500 - 11
Welwyn Garden City +30 18 £65,000 +33.33% 2
Rickmansworth +23 13 £50,000 -9.09% 2
Hatfield +31 5 £50,000 -16.67%
Stevenage +10 4 £50,000 +92.31% 1
Letchworth -15 4 £42,500 +25.00%
Hemel Hempstead -30 3 - - 7
Royston - 2 - - 1
Bishop's Stortford -3 1 £45,000 - 1
Hitchin -6 1 £42,500 +9.68% 3
TDD
East of England

For the 6 months to 25 August 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 Hertfordshire region with a requirement for TDD.

1 119 (90.15%) Agile Software Development
2 67 (50.76%) C#
3 66 (50.00%) BDD
4 65 (49.24%) Scrum
5 59 (44.70%) Continuous Integration
6 56 (42.42%) Azure
7 55 (41.67%) Git (software)
8 52 (39.39%) SQL
9 47 (35.61%) .NET
9 47 (35.61%) Test Automation
10 44 (33.33%) Java
11 40 (30.30%) JIRA
12 35 (26.52%) SQL Server
13 34 (25.76%) JavaScript
14 33 (25.00%) CSS
14 33 (25.00%) AWS
15 31 (23.48%) DevOps
16 30 (22.73%) SOLID
17 29 (21.97%) User Experience
17 29 (21.97%) E-Commerce
18 27 (20.45%) Retail
18 27 (20.45%) Kanban
18 27 (20.45%) QA
19 26 (19.70%) Unit Testing
19 26 (19.70%) Computer Science
19 26 (19.70%) Web Services
19 26 (19.70%) HTML
20 25 (18.94%) Degree
20 25 (18.94%) Test Scripting
20 25 (18.94%) Selenium

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 11 (8.33%) Confluence
2 10 (7.58%) WebSphere
3 9 (6.82%) Adobe Experience Manager
3 9 (6.82%) CoreMedia CMS
4 5 (3.79%) Apache Solr
5 4 (3.03%) nginx
6 1 (0.76%) JBoss
6 1 (0.76%) Tomcat
6 1 (0.76%) WebLogic
Applications
1 1 (0.76%) MS Visio
Business Applications
1 9 (6.82%) Magento
1 9 (6.82%) SAP Hybris
2 5 (3.79%) Fredhopper
Cloud Services
1 56 (42.42%) Azure
2 33 (25.00%) AWS
3 20 (15.15%) GCP
4 12 (9.09%) BrowserStack
4 12 (9.09%) Sauce Labs
5 9 (6.82%) Serverless
6 7 (5.30%) Cloud Computing
7 5 (3.79%) Algolia
8 1 (0.76%) Slack
Communications & Networking
1 8 (6.06%) TCP/IP
2 3 (2.27%) HTTP
2 3 (2.27%) HTTPS
3 1 (0.76%) Cisco Nexus
3 1 (0.76%) WAN
Database & Business Intelligence
1 35 (26.52%) SQL Server
2 15 (11.36%) NoSQL
3 9 (6.82%) MongoDB
4 8 (6.06%) SQL Server Reporting Services
5 5 (3.79%) PostgreSQL
5 5 (3.79%) SQL Server 2016
5 5 (3.79%) SQL Server Integration Services
6 3 (2.27%) Oracle Database
6 3 (2.27%) QlikView
6 3 (2.27%) SQL Server 2012
7 2 (1.52%) Big Data
8 1 (0.76%) MySQL
8 1 (0.76%) Relational Database
8 1 (0.76%) SQL Server 2008
Development Applications
1 55 (41.67%) Git (software)
2 40 (30.30%) JIRA
3 25 (18.94%) Selenium
4 21 (15.91%) Octopus Deploy
5 20 (15.15%) Appium
6 19 (14.39%) WebDriver
7 16 (12.12%) Atlassian Bamboo
7 16 (12.12%) SpecFlow
8 15 (11.36%) Cucumber
9 14 (10.61%) Zephyr
10 13 (9.85%) Jenkins
10 13 (9.85%) Moq
10 13 (9.85%) NUnit
11 11 (8.33%) Calabash
12 10 (7.58%) JUnit
12 10 (7.58%) Robot Framework
13 9 (6.82%) Artifactory
13 9 (6.82%) git-flow
13 9 (6.82%) Sonatype Nexus
13 9 (6.82%) xUnit.net
General
1 27 (20.45%) Retail
2 7 (5.30%) Finance
3 5 (3.79%) Public Sector
4 2 (1.52%) Games
4 2 (1.52%) Legal
5 1 (0.76%) Banking
5 1 (0.76%) Telecoms
Job Titles
1 87 (65.91%) Developer
2 29 (21.97%) Software Developer
3 22 (16.67%) Java Developer
4 21 (15.91%) Senior Developer
5 16 (12.12%) C# Developer
6 15 (11.36%) Analyst
6 15 (11.36%) Front End Developer (Client-Side Developer)
7 14 (10.61%) Data Analyst
7 14 (10.61%) Data Migration Analyst
7 14 (10.61%) Data Migration Tester
7 14 (10.61%) Full Stack Developer
7 14 (10.61%) Migration Analyst
7 14 (10.61%) QA Analyst
7 14 (10.61%) QA Test Analyst
7 14 (10.61%) QA Tester
7 14 (10.61%) Test Analyst
7 14 (10.61%) Tester
8 11 (8.33%) .NET Developer
8 11 (8.33%) Test Engineer
9 9 (6.82%) Agile Developer
Libraries, Frameworks & Software Standards
1 47 (35.61%) .NET
2 33 (25.00%) CSS
3 26 (19.70%) HTML
3 26 (19.70%) Web Services
4 24 (18.18%) Spring
5 22 (16.67%) AngularJS
5 22 (16.67%) REST
5 22 (16.67%) SOAP
6 20 (15.15%) Velocity
7 17 (12.88%) Unity DI Container
8 16 (12.12%) JSON
9 14 (10.61%) .NET Core
9 14 (10.61%) ASP.NET Web API
10 13 (9.85%) Hibernate
10 13 (9.85%) Ninject
10 13 (9.85%) React
10 13 (9.85%) RESTful
11 12 (9.09%) jQuery
12 11 (8.33%) .NET Framework
12 11 (8.33%) ASP.NET
Miscellaneous
1 29 (21.97%) User Experience
2 12 (9.09%) Analytical Skills
3 9 (6.82%) Enterprise Cloud
4 7 (5.30%) Enterprise Software
5 5 (3.79%) Greenfield Project
5 5 (3.79%) Reference Data
6 1 (0.76%) Algorithms
6 1 (0.76%) Online Games
Operating Systems
1 21 (15.91%) Windows
2 11 (8.33%) Android
2 11 (8.33%) Apple iOS
2 11 (8.33%) Mac OS
3 10 (7.58%) Linux
4 8 (6.06%) Windows Server
5 3 (2.27%) CentOS
Processes & Methodologies
1 119 (90.15%) Agile Software Development
2 66 (50.00%) BDD
3 65 (49.24%) Scrum
4 59 (44.70%) Continuous Integration
5 47 (35.61%) Test Automation
6 31 (23.48%) DevOps
7 30 (22.73%) SOLID
8 29 (21.97%) E-Commerce
9 27 (20.45%) Kanban
10 26 (19.70%) Computer Science
10 26 (19.70%) Unit Testing
11 25 (18.94%) Continuous Delivery
11 25 (18.94%) Test Scripting
12 23 (17.42%) MVC
13 20 (15.15%) Data Modelling
14 19 (14.39%) Data Migration
14 19 (14.39%) ETL
14 19 (14.39%) Migration
14 19 (14.39%) Scaled Agile Framework
15 18 (13.64%) Product Roadmap
Programming Languages
1 67 (50.76%) C#
2 52 (39.39%) SQL
3 44 (33.33%) Java
4 34 (25.76%) JavaScript
5 20 (15.15%) Java 8
6 19 (14.39%) Ruby
7 16 (12.12%) T-SQL
8 14 (10.61%) Python
9 9 (6.82%) Bash Shell
10 8 (6.06%) TypeScript
11 5 (3.79%) PL/SQL
12 4 (3.03%) PowerShell
13 1 (0.76%) Groovy
13 1 (0.76%) Shell Script
Qualifications
1 25 (18.94%) Degree
2 24 (18.18%) Computer Science Degree
3 19 (14.39%) Security Cleared
4 14 (10.61%) ISTQB
4 14 (10.61%) ISTQB Foundation Certification
5 5 (3.79%) SC Cleared
6 3 (2.27%) Postgraduate
7 1 (0.76%) CCNA
7 1 (0.76%) Cisco Certification
7 1 (0.76%) HND
7 1 (0.76%) MBCS
Quality Assurance & Compliance
1 27 (20.45%) QA
2 5 (3.79%) Data Quality
System Software
1 13 (9.85%) Docker
Systems Management
1 9 (6.82%) Puppet
2 4 (3.03%) HP Quality Center
2 4 (3.03%) Kibana
2 4 (3.03%) logstash
3 2 (1.52%) Ansible
3 2 (1.52%) Kubernetes
4 1 (0.76%) Nagios
4 1 (0.76%) Prometheus
Vendors
1 19 (14.39%) Google
2 10 (7.58%) Microsoft
3 9 (6.82%) Adobe
3 9 (6.82%) Elastic Path
3 9 (6.82%) hybris
3 9 (6.82%) IBM
3 9 (6.82%) Salesforce.com
3 9 (6.82%) SAP
4 8 (6.06%) Oracle
4 8 (6.06%) Splunk
5 5 (3.79%) Talend
6 3 (2.27%) Tableau
7 2 (1.52%) Xamarin
8 1 (0.76%) Juniper
8 1 (0.76%) SolarWinds