Period
to 20 September 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 20 September 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
East of England > Hertfordshire
6 months to
20 Sep 2018
Same period 2017 Same period 2016
Rank 24 29 58
Rank change year-on-year +5 +29 -24
Permanent jobs citing TDD 343 351 203
As % of all permanent IT jobs advertised in Hertfordshire 8.28% 8.55% 4.53%
As % of the Processes & Methodologies category 9.22% 9.61% 5.06%
Number of salaries quoted 325 317 202
Hertfordshire median annual salary £50,000 £50,000 £50,000
10th Percentile £35,000 £32,500 £31,075
90th Percentile £70,000 £72,500 £72,500
East of England median annual salary £50,000 £49,500 £45,750
% change year-on-year +1.01% +8.20% -3.68%

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 3,721 3,653 4,011
As % of all permanent IT jobs advertised in Hertfordshire 89.81% 88.97% 89.59%
Number of salaries quoted 2,914 3,099 3,298
Hertfordshire median annual salary £50,000 £47,000 £47,500
Median salary % change year-on-year +6.38% -1.05% +5.56%
10th Percentile £27,500 £27,000 £27,500
90th Percentile £75,000 £71,250 £71,250
East of England median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.56% - +1.12%

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 20 September 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 20 September 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
St Albans +11 97 £52,500 -19.23% 10
Watford -16 65 £54,000 +13.68% 5
Hemel Hempstead +7 36 £45,000 -14.29% 2
Harpenden - 15 £45,000 -
Welwyn Garden City -19 12 £61,250 - 1
Letchworth +11 11 £34,000 -9.33% 3
Bishop's Stortford +2 11 £45,000 - 4
Stevenage -4 11 £26,000 -42.22% 1
Hatfield -4 11 £60,000 - 1
Potters Bar - 8 £65,000 - 1
Hertford -2 6 £70,000 +3.70%
Rickmansworth -4 3 £55,000 -31.25%
Hitchin +7 2 £38,750 +3.33%
Borehamwood - 2 £42,000 -
Berkhamsted - 2 £46,250 - 1
Broxbourne -15 1 £75,000 +66.67% 2
Welwyn - 1 £63,000 - 1
TDD
East of England

For the 6 months to 20 September 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.

1 311 (90.67%) Agile Software Development
2 197 (57.43%) C#
3 167 (48.69%) .NET
4 156 (45.48%) BDD
5 137 (39.94%) JavaScript
6 121 (35.28%) MVC
7 117 (34.11%) Scrum
8 113 (32.94%) Java
9 104 (30.32%) SQL
10 102 (29.74%) ASP.NET
11 100 (29.15%) SQL Server
12 88 (25.66%) Continuous Integration
13 85 (24.78%) ASP.NET MVC
14 80 (23.32%) CSS
15 75 (21.87%) RESTful
16 73 (21.28%) HTML
17 70 (20.41%) Git (software)
18 69 (20.12%) Amazon AWS
19 68 (19.83%) ASP.NET Web API
20 66 (19.24%) Finance
21 60 (17.49%) OO
21 60 (17.49%) Web Application Development
22 59 (17.20%) Spring
23 56 (16.33%) Problem-Solving
24 50 (14.58%) Web Services
25 49 (14.29%) Test Automation
25 49 (14.29%) Java 8
26 48 (13.99%) AngularJS
27 45 (13.12%) User Experience
27 45 (13.12%) SQL Server 2016

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 (4.37%) Tomcat
2 12 (3.50%) SharePoint Server
3 10 (2.92%) Confluence
4 7 (2.04%) Oracle Service Bus
5 6 (1.75%) Oracle SOA Suite
5 6 (1.75%) WebLogic
6 5 (1.46%) JBoss
6 5 (1.46%) WebSphere
7 2 (0.58%) Elasticsearch
8 1 (0.29%) IIS
Applications
1 9 (2.62%) Chatbot
2 5 (1.46%) Microsoft Excel
2 5 (1.46%) Microsoft Office
2 5 (1.46%) Microsoft PowerPoint
Cloud Services
1 69 (20.12%) Amazon AWS
2 39 (11.37%) Microsoft Azure
3 15 (4.37%) npm
4 9 (2.62%) Amazon EC2
4 9 (2.62%) AWS Lambda
4 9 (2.62%) Serverless
5 3 (0.87%) AWS CloudTrail
5 3 (0.87%) Google Cloud Platform
5 3 (0.87%) Runscope
6 2 (0.58%) Cloud Computing
6 2 (0.58%) SaaS
7 1 (0.29%) Boomi
Communications & Networking
1 15 (4.37%) HTTP
2 9 (2.62%) SMS
3 5 (1.46%) Internet
3 5 (1.46%) SSL
4 4 (1.17%) VPN
5 2 (0.58%) Skype
6 1 (0.29%) Wi-Fi
Database & Business Intelligence
1 100 (29.15%) SQL Server
2 45 (13.12%) SQL Server 2016
3 24 (7.00%) NoSQL
4 16 (4.66%) Relational Database
5 15 (4.37%) RDBMS
6 13 (3.79%) PostgreSQL
7 12 (3.50%) SQL Server Reporting Services
8 11 (3.21%) MySQL
9 10 (2.92%) MongoDB
10 9 (2.62%) Amazon DynamoDB
10 9 (2.62%) Apache Cassandra
11 8 (2.33%) SQL Server 2014
12 7 (2.04%) SQL Server 2012
13 5 (1.46%) Big Data
13 5 (1.46%) Oracle Database
13 5 (1.46%) Oracle Database 12c
13 5 (1.46%) SQL Server Integration Services
14 4 (1.17%) Couchbase
15 2 (0.58%) BigQuery
16 1 (0.29%) Redis
Development Applications
1 70 (20.41%) Git (software)
2 31 (9.04%) Visual Studio
3 26 (7.58%) NUnit
3 26 (7.58%) StyleCop
4 25 (7.29%) JIRA
5 18 (5.25%) webpack
6 16 (4.66%) gulp
6 16 (4.66%) Jasmine
7 15 (4.37%) Karma Test Runner
7 15 (4.37%) Selenium
8 13 (3.79%) Maven
9 12 (3.50%) WebDriver
10 11 (3.21%) Cucumber
11 9 (2.62%) Jenkins
12 7 (2.04%) JMeter
13 6 (1.75%) Robot Framework
13 6 (1.75%) Team Foundation Server
13 6 (1.75%) TeamCity
14 5 (1.46%) LoadRunner
14 5 (1.46%) Subversion
General
1 66 (19.24%) Finance
2 33 (9.62%) Retail
3 32 (9.33%) Marketing
4 28 (8.16%) Games
5 27 (7.87%) Advertising
6 24 (7.00%) Back Office
7 10 (2.92%) Legal
8 3 (0.87%) Automotive
9 1 (0.29%) Law
Job Titles
1 285 (83.09%) Developer
2 127 (37.03%) .NET Developer
3 78 (22.74%) C# Developer
4 73 (21.28%) Java Developer
5 58 (16.91%) C# .NET Developer
6 45 (13.12%) Software Developer
7 39 (11.37%) Senior Developer
8 33 (9.62%) Full Stack Developer
9 31 (9.04%) C# Software Developer
10 29 (8.45%) .NET Software Developer
11 25 (7.29%) ASP.NET Developer
12 24 (7.00%) JavaScript Developer
13 23 (6.71%) C# ASP.NET Developer
14 22 (6.41%) Angular Developer
15 19 (5.54%) Front End Developer (Client-Side Developer)
16 18 (5.25%) Data Migration Developer
17 17 (4.96%) HTML CSS Developer
17 17 (4.96%) HTML Developer
18 16 (4.66%) Software Engineer
19 15 (4.37%) Senior Java Developer
Libraries, Frameworks & Software Standards
1 167 (48.69%) .NET
2 102 (29.74%) ASP.NET
3 85 (24.78%) ASP.NET MVC
4 80 (23.32%) CSS
5 75 (21.87%) RESTful
6 73 (21.28%) HTML
7 68 (19.83%) ASP.NET Web API
8 59 (17.20%) Spring
9 50 (14.58%) Web Services
10 48 (13.99%) AngularJS
11 45 (13.12%) .NET Framework
11 45 (13.12%) XML
12 43 (12.54%) jQuery
13 41 (11.95%) WCF
14 35 (10.20%) ASP.NET MVC 5
14 35 (10.20%) Entity Framework
15 33 (9.62%) Akka
16 31 (9.04%) HTML5
17 29 (8.45%) Sass
18 27 (7.87%) React
Miscellaneous
1 45 (13.12%) User Experience
2 43 (12.54%) Computer Science
3 36 (10.50%) Greenfield Project
4 26 (7.58%) Analytical Skills
5 21 (6.12%) Robotics
6 19 (5.54%) Mobile App
7 18 (5.25%) Reference Data
8 15 (4.37%) Media Streaming
9 8 (2.33%) Fintech
10 5 (1.46%) Private Cloud
11 4 (1.17%) Self-Motivation
11 4 (1.17%) Social Media
12 3 (0.87%) BBC
13 2 (0.58%) Algorithms
14 1 (0.29%) Digital TV
14 1 (0.29%) EPoS
14 1 (0.29%) Internet of Things
14 1 (0.29%) Mainframe
Operating Systems
1 18 (5.25%) Linux
2 15 (4.37%) Unix
3 9 (2.62%) Windows
3 9 (2.62%) Windows Server
4 6 (1.75%) Android
5 2 (0.58%) Apple iOS
Processes & Methodologies
1 311 (90.67%) Agile Software Development
2 156 (45.48%) BDD
3 121 (35.28%) MVC
4 117 (34.11%) Scrum
5 88 (25.66%) Continuous Integration
6 60 (17.49%) OO
6 60 (17.49%) Web Application Development
7 56 (16.33%) Problem-Solving
8 49 (14.29%) Test Automation
9 37 (10.79%) Continuous Delivery
10 36 (10.50%) SOLID
11 34 (9.91%) Dependency Injection
12 31 (9.04%) Front End Development
13 30 (8.75%) CRM
14 26 (7.58%) Coaching
14 26 (7.58%) E-Commerce
15 25 (7.29%) Software Engineering
16 21 (6.12%) Unit Testing
16 21 (6.12%) Validation
17 20 (5.83%) Migration
Programming Languages
1 197 (57.43%) C#
2 137 (39.94%) JavaScript
3 113 (32.94%) Java
4 104 (30.32%) SQL
5 49 (14.29%) Java 8
6 41 (11.95%) Scala
7 28 (8.16%) Haskell
8 26 (7.58%) ES6
9 23 (6.71%) PL/SQL
10 20 (5.83%) Ruby
11 17 (4.96%) TypeScript
12 13 (3.79%) C++
13 12 (3.50%) T-SQL
14 11 (3.21%) Python
15 9 (2.62%) PowerShell
16 7 (2.04%) Shell Script
17 6 (1.75%) PHP
18 5 (1.46%) ANSI SQL
19 4 (1.17%) C
19 4 (1.17%) VB.NET
Qualifications
1 27 (7.87%) Degree
2 26 (7.58%) Computer Science Degree
3 21 (6.12%) SC Cleared
3 21 (6.12%) Security Cleared
4 9 (2.62%) HND
5 2 (0.58%) ISTQB
5 2 (0.58%) ISTQB Foundation Certification
Quality Assurance & Compliance
1 18 (5.25%) Data Quality
2 11 (3.21%) QA
3 1 (0.29%) GCP
System Software
1 32 (9.33%) Docker
Systems Management
1 27 (7.87%) Kubernetes
2 2 (0.58%) Grafana
2 2 (0.58%) Icinga
2 2 (0.58%) Kibana
2 2 (0.58%) logstash
2 2 (0.58%) Nagios
2 2 (0.58%) Prometheus
2 2 (0.58%) ZABBIX
3 1 (0.29%) Ansible
3 1 (0.29%) Puppet
3 1 (0.29%) Terraform
Vendors
1 30 (8.75%) Facebook
2 27 (7.87%) Microsoft
2 27 (7.87%) Oracle
3 6 (1.75%) Google
3 6 (1.75%) Talend
4 5 (1.46%) MicroStrategy
4 5 (1.46%) Sybase
5 4 (1.17%) Citrix
5 4 (1.17%) Veeam
5 4 (1.17%) VMware
6 3 (0.87%) AppDynamics
6 3 (0.87%) Apple
6 3 (0.87%) Atlassian
6 3 (0.87%) Sony
6 3 (0.87%) Splunk
6 3 (0.87%) Yahoo!
7 2 (0.58%) IBM
7 2 (0.58%) PagerDuty
8 1 (0.29%) Dell
8 1 (0.29%) TIBCO