Period
to 19 January 2020

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 19 January 2020 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
East of England > Hertfordshire
6 months to
19 Jan 2020
Same period 2019 Same period 2018
Rank 26 26 21
Rank change year-on-year 0 -5 +11
Permanent jobs citing TDD 167 287 420
As % of all permanent IT jobs advertised in Hertfordshire 8.53% 8.07% 9.38%
As % of the Processes & Methodologies category 9.50% 8.97% 10.40%
Number of salaries quoted 124 272 389
Hertfordshire median annual salary £57,500 £52,500 £50,000
Median salary % change year-on-year +9.52% +5.00% +11.11%
10th Percentile £42,875 £35,075 £32,500
90th Percentile £82,500 £68,625 £72,500
East of England median annual salary £57,500 £52,500 £49,500
% change year-on-year +9.52% +6.06% +9.17%

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 1,757 3,200 4,040
As % of all permanent IT jobs advertised in Hertfordshire 89.73% 89.94% 90.20%
Number of salaries quoted 1,292 2,483 3,426
Hertfordshire median annual salary £51,000 £50,000 £50,000
Median salary % change year-on-year +2.00% - -
10th Percentile £27,825 £26,250 £27,000
90th Percentile £80,000 £75,000 £71,250
East of England median annual salary £50,000 £47,500 £47,500
% change year-on-year +5.26% - +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 19 January 2020.

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 19 January 2020. 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
St Albans -1 68 £52,500 - 11
Hertford +9 15 £80,000 +60.00%
Hemel Hempstead +5 14 £50,000 +11.11% 1
Rickmansworth - 14 £50,000 - 1
Watford -31 8 £60,000 - 3
Welwyn Garden City +17 6 £57,500 +4.55% 2
Letchworth -3 4 £42,500 +25.00%
Bishop's Stortford -1 2 £47,500 -26.92% 4
Hitchin - 2 £48,750 -
Hatfield +24 1 £50,000 -16.67% 5
Borehamwood +1 1 £50,000 +24.22%
Harpenden -6 1 £45,000 -
Royston - 1 - - 3
TDD
East of England

For the 6 months to 19 January 2020, 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.

1 146 (87.43%) Agile Software Development
2 108 (64.67%) BDD
3 101 (60.48%) Scrum
4 72 (43.11%) C#
5 69 (41.32%) .NET
6 66 (39.52%) JavaScript
6 66 (39.52%) Azure
7 63 (37.72%) CSS
8 61 (36.53%) Continuous Integration
9 59 (35.33%) Git (software)
10 55 (32.93%) AWS
11 54 (32.34%) Java
12 48 (28.74%) JIRA
13 47 (28.14%) AngularJS
14 46 (27.54%) Unit Testing
14 46 (27.54%) E-Commerce
15 45 (26.95%) Web Services
15 45 (26.95%) Android
16 44 (26.35%) Apple iOS
17 43 (25.75%) MVC
17 43 (25.75%) Continuous Delivery
18 42 (25.15%) HTML
19 40 (23.95%) TypeScript
20 39 (23.35%) User Experience
21 38 (22.75%) SQL
22 36 (21.56%) SOLID
23 35 (20.96%) Finance
24 33 (19.76%) Confluence
25 31 (18.56%) RESTful
26 30 (17.96%) Problem-Solving

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 33 (19.76%) Confluence
2 16 (9.58%) Tomcat
3 4 (2.40%) nginx
4 2 (1.20%) CMS
4 2 (1.20%) Sitecore CMS
5 1 (0.60%) Adobe Experience Manager
5 1 (0.60%) CoreMedia CMS
5 1 (0.60%) WebSphere
Applications
1 11 (6.59%) Adobe XD
1 11 (6.59%) InVision
1 11 (6.59%) Zeplin
2 1 (0.60%) MS Visio
Business Applications
1 3 (1.80%) Magento
2 1 (0.60%) SAP Hybris
Cloud Services
1 66 (39.52%) Azure
2 55 (32.93%) AWS
3 11 (6.59%) GCP
3 11 (6.59%) GitHub
3 11 (6.59%) npm
4 6 (3.59%) BrowserStack
4 6 (3.59%) Sauce Labs
5 2 (1.20%) Serverless
6 1 (0.60%) Azure Functions
6 1 (0.60%) Cloud Computing
6 1 (0.60%) Slack
Communications & Networking
1 8 (4.79%) TCP/IP
2 4 (2.40%) HTTP
2 4 (2.40%) HTTPS
2 4 (2.40%) Wi-Fi
3 2 (1.20%) Cisco Nexus
3 2 (1.20%) Wireless
4 1 (0.60%) Broadband
4 1 (0.60%) Internet
Database & Business Intelligence
1 23 (13.77%) SQL Server
2 11 (6.59%) NoSQL
3 8 (4.79%) QlikView
3 8 (4.79%) SQL Server Reporting Services
4 6 (3.59%) SQL Server 2016
5 3 (1.80%) Azure SQL Database
5 3 (1.80%) SQL Server 2012
6 2 (1.20%) Big Data
7 1 (0.60%) Apache Cassandra
7 1 (0.60%) MongoDB
7 1 (0.60%) MySQL
7 1 (0.60%) RavenDB
7 1 (0.60%) Relational Database
Development Applications
1 59 (35.33%) Git (software)
2 48 (28.74%) JIRA
3 28 (16.77%) Jenkins
4 20 (11.98%) TeamCity
5 19 (11.38%) Atlassian Bamboo
6 17 (10.18%) Jasmine
6 17 (10.18%) Karma Test Runner
7 14 (8.38%) Selenium
8 11 (6.59%) Axure RP
8 11 (6.59%) Balsamiq
8 11 (6.59%) TestRail
9 8 (4.79%) Artifactory
9 8 (4.79%) Sonatype Nexus
10 6 (3.59%) Appium
10 6 (3.59%) Cucumber
10 6 (3.59%) Robot Framework
10 6 (3.59%) WebDriver
11 5 (2.99%) Calabash
12 4 (2.40%) Team Foundation Server
13 3 (1.80%) Visual Studio
General
1 35 (20.96%) Finance
2 24 (14.37%) Legal
3 21 (12.57%) Retail
4 4 (2.40%) Banking
5 3 (1.80%) Games
6 2 (1.20%) Music Industry
7 1 (0.60%) Advertising
7 1 (0.60%) Marketing
Job Titles
1 100 (59.88%) Developer
2 30 (17.96%) .NET Developer
3 29 (17.37%) Software Developer
4 22 (13.17%) Front End Developer (Client-Side Developer)
5 20 (11.98%) C# Developer
6 19 (11.38%) C# .NET Developer
7 15 (8.98%) Development Manager
7 15 (8.98%) Java Development Manager
7 15 (8.98%) Software Development Manager
7 15 (8.98%) Software Manager
8 12 (7.19%) Java Developer
8 12 (7.19%) Test Engineer
9 11 (6.59%) Senior Test Engineer
10 10 (5.99%) Platform Engineer
10 10 (5.99%) Senior Platform Engineer
11 9 (5.39%) iOS Developer
12 8 (4.79%) Full Stack Developer
13 7 (4.19%) Tester
14 6 (3.59%) Analyst
14 6 (3.59%) Digital Developer
Libraries, Frameworks & Software Standards
1 69 (41.32%) .NET
2 63 (37.72%) CSS
3 47 (28.14%) AngularJS
4 45 (26.95%) Web Services
5 42 (25.15%) HTML
6 31 (18.56%) RESTful
7 29 (17.37%) .NET Framework
7 29 (17.37%) Angular 2
8 28 (16.77%) Sass
8 28 (16.77%) Spring
9 27 (16.17%) JSON
10 21 (12.57%) REST
10 21 (12.57%) Velocity
11 20 (11.98%) ASP.NET
12 18 (10.78%) ASP.NET Web API
12 18 (10.78%) Node.js
13 17 (10.18%) JDBC
14 16 (9.58%) ASP.NET MVC
14 16 (9.58%) J2EE
15 15 (8.98%) Struts
Miscellaneous
1 39 (23.35%) User Experience
2 17 (10.18%) Analytical Skills
3 12 (7.19%) Mobile App
4 11 (6.59%) Self-Motivation
5 8 (4.79%) Enterprise Cloud
6 6 (3.59%) Greenfield Project
7 2 (1.20%) Vector Graphics
7 2 (1.20%) W3C
8 1 (0.60%) Algorithms
8 1 (0.60%) BBC
8 1 (0.60%) Online Games
8 1 (0.60%) Public Cloud
8 1 (0.60%) Social Media
8 1 (0.60%) Virtual Team
Operating Systems
1 45 (26.95%) Android
2 44 (26.35%) Apple iOS
3 21 (12.57%) Windows
4 15 (8.98%) Mac OS
5 8 (4.79%) Linux
6 4 (2.40%) CentOS
Processes & Methodologies
1 146 (87.43%) Agile Software Development
2 108 (64.67%) BDD
3 101 (60.48%) Scrum
4 61 (36.53%) Continuous Integration
5 46 (27.54%) E-Commerce
5 46 (27.54%) Unit Testing
6 43 (25.75%) Continuous Delivery
6 43 (25.75%) MVC
7 36 (21.56%) SOLID
8 30 (17.96%) Problem-Solving
9 29 (17.37%) Android Development
9 29 (17.37%) Computer Science
9 29 (17.37%) Test Automation
10 28 (16.77%) iOS Development
10 28 (16.77%) Mobile Development
10 28 (16.77%) Project Management
11 24 (14.37%) Innovative Thinking
12 23 (13.77%) Kanban
13 22 (13.17%) Due Diligence
14 21 (12.57%) Product Roadmap
Programming Languages
1 72 (43.11%) C#
2 66 (39.52%) JavaScript
3 54 (32.34%) Java
4 40 (23.95%) TypeScript
5 38 (22.75%) SQL
6 29 (17.37%) Python
7 16 (9.58%) Ruby
8 14 (8.38%) Kotlin
9 13 (7.78%) Apple Swift
10 12 (7.19%) Java 8
11 11 (6.59%) ES6
12 8 (4.79%) Bash Shell
13 4 (2.40%) PowerShell
14 3 (1.80%) PHP
15 2 (1.20%) C
15 2 (1.20%) C++
16 1 (0.60%) F#
16 1 (0.60%) Go
16 1 (0.60%) Scala
16 1 (0.60%) T-SQL
Qualifications
1 28 (16.77%) Degree
2 23 (13.77%) Computer Science Degree
3 18 (10.78%) Postgraduate
4 4 (2.40%) ISTQB
5 2 (1.20%) CCNA
5 2 (1.20%) Cisco Certification
5 2 (1.20%) ISTQB Foundation Certification
5 2 (1.20%) Security Cleared
6 1 (0.60%) MBCS
Quality Assurance & Compliance
1 6 (3.59%) QA
2 1 (0.60%) GDPR
System Software
1 8 (4.79%) Docker
2 5 (2.99%) Hyper-V
Systems Management
1 11 (6.59%) HP Quality Center
2 8 (4.79%) Puppet
3 4 (2.40%) Kibana
3 4 (2.40%) logstash
4 3 (1.80%) Kubernetes
5 2 (1.20%) Ansible
5 2 (1.20%) Nagios
5 2 (1.20%) Prometheus
6 1 (0.60%) Docker Swarm
Vendors
1 21 (12.57%) Microsoft
2 12 (7.19%) Adobe
3 10 (5.99%) Google
4 8 (4.79%) Tableau
5 3 (1.80%) Oracle
6 2 (1.20%) Facebook
6 2 (1.20%) Juniper
6 2 (1.20%) Sitecore
6 2 (1.20%) SolarWinds
7 1 (0.60%) Apple
7 1 (0.60%) Elastic Path
7 1 (0.60%) hybris
7 1 (0.60%) IBM
7 1 (0.60%) Salesforce.com
7 1 (0.60%) SAP
7 1 (0.60%) Sony
7 1 (0.60%) Yahoo!