Period
to 23 January 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 23 January 2019 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
East of England > Hertfordshire
6 months to
23 Jan 2019
Same period 2018 Same period 2017
Rank 27 21 32
Rank change year-on-year -6 +11 +6
Permanent jobs citing TDD 284 428 293
As % of all permanent IT jobs advertised in Hertfordshire 7.99% 9.38% 6.64%
As % of the Processes & Methodologies category 8.99% 10.47% 7.34%
Number of salaries quoted 269 397 278
Hertfordshire median annual salary £52,500 £50,000 £45,000
Median salary % change year-on-year +5.00% +11.11% -14.29%
10th Percentile £35,600 £32,500 £31,600
90th Percentile £68,750 £72,500 £72,500
East of England median annual salary £52,500 £47,500 £45,344
% change year-on-year +10.53% +4.75% -4.54%

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 3,159 4,086 3,992
As % of all permanent IT jobs advertised in Hertfordshire 88.84% 89.57% 90.46%
Number of salaries quoted 2,442 3,465 3,300
Hertfordshire median annual salary £50,000 £50,000 £50,000
10th Percentile £26,250 £27,000 £26,975
90th Percentile £75,000 £71,250 £72,500
East of England median annual salary £47,500 £47,500 £45,000
% change year-on-year - +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 23 January 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 23 January 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 +2 85 £60,000 +33.33% 6
St Albans +9 63 £52,500 -19.23% 11
Welwyn Garden City +18 27 £59,000 -1.67% 1
Hemel Hempstead -10 20 £45,000 -14.29% 2
Borehamwood +21 10 £40,250 -
Stevenage -5 10 £55,000 +22.22% 3
Hatfield +10 9 £60,000 - 2
Letchworth -9 7 £34,000 -
Welwyn - 6 £63,000 -
Harpenden +7 4 £45,000 -
Bishop's Stortford +4 4 £65,000 +44.44% 1
Potters Bar -4 4 £65,000 -5.45% 1
Hoddesdon -1 1 £55,000 +83.33% 1
Hitchin -3 1 £42,500 +21.43% 1
Broxbourne -9 1 £75,000 +66.67%
Hertford -12 1 £50,000 -28.57% 1
Baldock - 1 £35,000 - 1
Berkhamsted - 1 £42,500 -
TDD
East of England

For the 6 months to 23 January 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.

1 250 (88.03%) Agile Software Development
2 181 (63.73%) C#
3 152 (53.52%) JavaScript
4 137 (48.24%) .NET
5 118 (41.55%) SQL
6 114 (40.14%) BDD
7 106 (37.32%) Scrum
8 101 (35.56%) MVC
9 99 (34.86%) CSS
10 93 (32.75%) SQL Server
11 85 (29.93%) HTML
12 83 (29.23%) ASP.NET
13 77 (27.11%) Java
14 76 (26.76%) AngularJS
15 69 (24.30%) Amazon AWS
15 69 (24.30%) Continuous Integration
16 65 (22.89%) RESTful
17 61 (21.48%) Test Automation
18 57 (20.07%) Git (software)
19 54 (19.01%) ASP.NET MVC
19 54 (19.01%) OO
20 52 (18.31%) XML
21 50 (17.61%) Web Services
22 49 (17.25%) Unit Testing
22 49 (17.25%) jQuery
23 47 (16.55%) Problem-Solving
24 46 (16.20%) User Experience
25 45 (15.85%) .NET Framework
25 45 (15.85%) Microsoft Azure
25 45 (15.85%) Oracle

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 20 (7.04%) Tomcat
2 10 (3.52%) JBoss
2 10 (3.52%) WebLogic
3 8 (2.82%) SharePoint Server
4 7 (2.46%) WebSphere
5 5 (1.76%) Oracle Service Bus
5 5 (1.76%) Oracle SOA Suite
6 3 (1.06%) Confluence
7 1 (0.35%) Elasticsearch
7 1 (0.35%) GlassFish
Applications
1 5 (1.76%) Microsoft Excel
1 5 (1.76%) Microsoft Office
1 5 (1.76%) Microsoft PowerPoint
2 2 (0.70%) Chatbot
Cloud Services
1 69 (24.30%) Amazon AWS
2 45 (15.85%) Microsoft Azure
3 16 (5.63%) Amazon EC2
3 16 (5.63%) AWS Lambda
3 16 (5.63%) SaaS
3 16 (5.63%) Serverless
4 6 (2.11%) Amazon CloudWatch
4 6 (2.11%) IaaS
4 6 (2.11%) PaaS
5 4 (1.41%) npm
6 1 (0.35%) Cloud Computing
6 1 (0.35%) Google Cloud Platform
Communications & Networking
1 12 (4.23%) HTTP
2 5 (1.76%) SSL
3 4 (1.41%) Internet
4 2 (0.70%) SMS
5 1 (0.35%) Hyperconnected
5 1 (0.35%) Skype
5 1 (0.35%) Wi-Fi
Database & Business Intelligence
1 93 (32.75%) SQL Server
2 36 (12.68%) SQL Server 2016
3 27 (9.51%) SQL Server Reporting Services
4 23 (8.10%) SQL Server Integration Services
5 22 (7.75%) PostgreSQL
6 21 (7.39%) Relational Database
7 16 (5.63%) Amazon DynamoDB
8 15 (5.28%) MySQL
9 13 (4.58%) RDBMS
10 12 (4.23%) MongoDB
11 11 (3.87%) NoSQL
12 6 (2.11%) Apache Cassandra
12 6 (2.11%) Oracle Database
12 6 (2.11%) SQL Server 2012
13 5 (1.76%) Oracle Database 12c
13 5 (1.76%) SQL Server 2014
14 3 (1.06%) DB2
15 2 (0.70%) Big Data
15 2 (0.70%) QlikView
16 1 (0.35%) RavenDB
Development Applications
1 57 (20.07%) Git (software)
2 39 (13.73%) NUnit
3 33 (11.62%) JIRA
4 28 (9.86%) Visual Studio
5 27 (9.51%) Subversion
6 17 (5.99%) Octopus Deploy
6 17 (5.99%) StyleCop
7 15 (5.28%) Atlassian Bamboo
8 13 (4.58%) Moq
9 11 (3.87%) Maven
10 9 (3.17%) webpack
11 8 (2.82%) Zephyr
12 6 (2.11%) Selenium
13 5 (1.76%) Cucumber
13 5 (1.76%) gulp
13 5 (1.76%) Jasmine
13 5 (1.76%) Jenkins
14 4 (1.41%) Karma Test Runner
14 4 (1.41%) PostCSS
14 4 (1.41%) Team Foundation Server
General
1 35 (12.32%) Retail
2 32 (11.27%) Finance
3 16 (5.63%) Back Office
4 12 (4.23%) Advertising
4 12 (4.23%) Marketing
5 6 (2.11%) Games
6 3 (1.06%) Automotive
6 3 (1.06%) Publishing
7 1 (0.35%) Legal
Job Titles
1 225 (79.23%) Developer
2 107 (37.68%) .NET Developer
3 92 (32.39%) C# Developer
4 61 (21.48%) C# .NET Developer
5 59 (20.77%) Full Stack Developer
6 39 (13.73%) Java Developer
7 37 (13.03%) Senior Developer
8 33 (11.62%) Software Developer
9 27 (9.51%) C# Software Developer
10 25 (8.80%) Software Engineer
11 24 (8.45%) Data Migration Developer
12 23 (8.10%) .NET Software Developer
13 22 (7.75%) ETL Developer
13 22 (7.75%) Oracle Developer
13 22 (7.75%) Oracle ETL Developer
13 22 (7.75%) PostgreSQL Developer
13 22 (7.75%) SQL Developer
13 22 (7.75%) SQL Server Developer
14 21 (7.39%) JavaScript Developer
15 20 (7.04%) Angular Developer
Libraries, Frameworks & Software Standards
1 137 (48.24%) .NET
2 99 (34.86%) CSS
3 85 (29.93%) HTML
4 83 (29.23%) ASP.NET
5 76 (26.76%) AngularJS
6 65 (22.89%) RESTful
7 54 (19.01%) ASP.NET MVC
8 52 (18.31%) XML
9 50 (17.61%) Web Services
10 49 (17.25%) jQuery
11 45 (15.85%) .NET Framework
12 44 (15.49%) React
13 43 (15.14%) ASP.NET Web API
14 36 (12.68%) Spring
15 33 (11.62%) JSON
16 32 (11.27%) Entity Framework
17 30 (10.56%) Sass
17 30 (10.56%) WCF
18 27 (9.51%) Node.js
19 26 (9.15%) .NET Core
Miscellaneous
1 46 (16.20%) User Experience
2 41 (14.44%) Greenfield Project
3 33 (11.62%) Analytical Skills
4 24 (8.45%) Reference Data
5 16 (5.63%) Mobile App
6 10 (3.52%) Fintech
7 7 (2.46%) Robotics
8 4 (1.41%) Media Streaming
9 2 (0.70%) Digital TV
9 2 (0.70%) Enterprise Software
10 1 (0.35%) Algorithms
10 1 (0.35%) Internet of Things
Operating Systems
1 13 (4.58%) Windows
2 9 (3.17%) Linux
2 9 (3.17%) Unix
3 5 (1.76%) Windows Server
4 1 (0.35%) Android
Processes & Methodologies
1 250 (88.03%) Agile Software Development
2 114 (40.14%) BDD
3 106 (37.32%) Scrum
4 101 (35.56%) MVC
5 69 (24.30%) Continuous Integration
6 61 (21.48%) Test Automation
7 54 (19.01%) OO
8 49 (17.25%) Unit Testing
9 47 (16.55%) Problem-Solving
10 41 (14.44%) Kanban
11 39 (13.73%) SOLID
12 36 (12.68%) Software Engineering
12 36 (12.68%) Web Application Development
13 33 (11.62%) Scaled Agile Framework
14 32 (11.27%) Data Migration
14 32 (11.27%) Migration
15 30 (10.56%) ETL
16 29 (10.21%) Continuous Delivery
16 29 (10.21%) Dependency Injection
16 29 (10.21%) Front End Development
Programming Languages
1 181 (63.73%) C#
2 152 (53.52%) JavaScript
3 118 (41.55%) SQL
4 77 (27.11%) Java
5 29 (10.21%) PL/SQL
6 26 (9.15%) Java 8
6 26 (9.15%) Scala
6 26 (9.15%) T-SQL
7 19 (6.69%) C++
8 18 (6.34%) ES6
8 18 (6.34%) Python
9 17 (5.99%) TypeScript
10 14 (4.93%) C
11 9 (3.17%) XAML
12 7 (2.46%) Haskell
13 6 (2.11%) VB.NET
14 5 (1.76%) ANSI SQL
14 5 (1.76%) Shell Script
15 4 (1.41%) Ruby
16 2 (0.70%) PowerShell
Qualifications
1 24 (8.45%) SC Cleared
1 24 (8.45%) Security Cleared
2 22 (7.75%) Degree
3 20 (7.04%) Computer Science Degree
4 8 (2.82%) ISTQB
4 8 (2.82%) ISTQB Foundation Certification
5 3 (1.06%) HND
6 2 (0.70%) Postgraduate
Quality Assurance & Compliance
1 24 (8.45%) Data Quality
2 15 (5.28%) QA
System Software
1 18 (6.34%) Docker
2 6 (2.11%) vSphere
Systems Management
1 10 (3.52%) Kubernetes
2 7 (2.46%) Ansible
3 6 (2.11%) Business Desktop Deployment
3 6 (2.11%) SCOM
3 6 (2.11%) Terraform
4 1 (0.35%) Grafana
4 1 (0.35%) Icinga
4 1 (0.35%) Kibana
4 1 (0.35%) logstash
4 1 (0.35%) Nagios
4 1 (0.35%) Prometheus
4 1 (0.35%) ZABBIX
Vendors
1 45 (15.85%) Oracle
2 40 (14.08%) Microsoft
3 19 (6.69%) Talend
4 12 (4.23%) Facebook
5 11 (3.87%) Xamarin
6 6 (2.11%) Demandware
6 6 (2.11%) VMware
7 5 (1.76%) MicroStrategy
7 5 (1.76%) Sybase
8 2 (0.70%) Atlassian
8 2 (0.70%) Tableau
9 1 (0.35%) Google
9 1 (0.35%) IBM
9 1 (0.35%) PagerDuty