Period
to 20 October 2018

The following table provides summary statistics for permanent job vacancies advertised in Welwyn Garden City 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 October 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > Welwyn Garden City
6 months to
20 Oct 2018
Same period 2017 Same period 2016
Rank 53 34 31
Rank change year-on-year -19 -3 -7
Permanent jobs citing TDD 12 7 8
As % of all permanent IT jobs advertised in Welwyn Garden City 2.87% 3.68% 3.86%
As % of the Processes & Methodologies category 2.93% 4.02% 3.94%
Number of salaries quoted 7 1 8
Welwyn Garden City median annual salary £55,000 £60,000 £70,000
Median salary % change year-on-year -8.33% -14.29% -6.67%
10th Percentile £46,750 £55,000 £63,750
90th Percentile £86,250 £65,000 £107,500
Hertfordshire median annual salary £51,250 £47,500 £47,500
% change year-on-year +7.89% - -5.00%

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 Welwyn Garden City with a requirement for process or methodology skills.

All Process and Methodology Skills
Welwyn Garden City
Permanent vacancies with a requirement for process or methodology skills 409 174 203
As % of all permanent IT jobs advertised in Welwyn Garden City 97.85% 91.58% 98.07%
Number of salaries quoted 161 134 172
Welwyn Garden City median annual salary £55,000 £39,625 £50,000
Median salary % change year-on-year +38.80% -20.75% -3.85%
10th Percentile £31,250 £31,250 £31,250
90th Percentile £77,500 £68,750 £71,250
Hertfordshire median annual salary £50,000 £47,500 £47,500
% change year-on-year +5.26% - +5.56%

TDD
Job Vacancy Trend in Welwyn Garden City

Job postings citing TDD as a percentage of all IT jobs advertised in Welwyn Garden City.

Job vacancy trend for TDD in Welwyn Garden City

TDD
Salary Trend in Welwyn Garden City

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

Salary trend for TDD in Welwyn Garden City

TDD
Salary Histogram in Welwyn Garden City

The salary distribution of IT jobs citing TDD in Welwyn Garden City over the 6 months to 20 October 2018.

Salary histogram for TDD in Welwyn Garden City

For the 6 months to 20 October 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 Welwyn Garden City region with a requirement for TDD.

1 8 (66.67%) Agile Software Development
1 8 (66.67%) Retail
2 6 (50.00%) Continuous Integration
3 5 (41.67%) Microsoft
3 5 (41.67%) MicroStrategy
3 5 (41.67%) Microsoft Excel
3 5 (41.67%) C#
3 5 (41.67%) .NET
3 5 (41.67%) JavaScript
3 5 (41.67%) Microsoft Office
3 5 (41.67%) Microsoft PowerPoint
3 5 (41.67%) Root Cause Analysis
3 5 (41.67%) Data Analytics
3 5 (41.67%) Process Improvement
3 5 (41.67%) Analytics
3 5 (41.67%) Translating Business Requirements
3 5 (41.67%) Acceptance Criteria
3 5 (41.67%) Gamification
3 5 (41.67%) Due Diligence
4 4 (33.33%) AngularJS
4 4 (33.33%) ASP.NET Web API
4 4 (33.33%) CSS
4 4 (33.33%) HTML
4 4 (33.33%) MVC
5 3 (25.00%) SQL
5 3 (25.00%) Microsoft Azure
5 3 (25.00%) Amazon AWS
5 3 (25.00%) RESTful
5 3 (25.00%) React
5 3 (25.00%) Twitter Bootstrap

TDD
Co-occurring IT Skills in Welwyn Garden City 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:

Applications
1 5 (41.67%) Microsoft Excel
1 5 (41.67%) Microsoft Office
1 5 (41.67%) Microsoft PowerPoint
Cloud Services
1 3 (25.00%) Amazon AWS
1 3 (25.00%) Microsoft Azure
2 1 (8.33%) Amazon EC2
2 1 (8.33%) AWS Lambda
2 1 (8.33%) SaaS
2 1 (8.33%) Serverless
Communications & Networking
1 1 (8.33%) HTTP
Database & Business Intelligence
1 1 (8.33%) Amazon DynamoDB
1 1 (8.33%) Couchbase
1 1 (8.33%) MongoDB
1 1 (8.33%) MySQL
1 1 (8.33%) NoSQL
1 1 (8.33%) Relational Database
1 1 (8.33%) SQL Server
Development Applications
1 1 (8.33%) Git (software)
1 1 (8.33%) Subversion
1 1 (8.33%) Visual Studio
General
1 8 (66.67%) Retail
2 1 (8.33%) Marketing
Job Titles
1 6 (50.00%) Developer
2 5 (41.67%) Product Manager
3 3 (25.00%) C# Developer
3 3 (25.00%) Software Developer
4 2 (16.67%) .NET Developer
4 2 (16.67%) Angular Developer
4 2 (16.67%) C# .NET Developer
4 2 (16.67%) C# Software Developer
4 2 (16.67%) HTML CSS Developer
4 2 (16.67%) HTML Developer
4 2 (16.67%) JavaScript Developer
4 2 (16.67%) Software Engineer
5 1 (8.33%) .NET Software Developer
5 1 (8.33%) ASP.NET MVC Developer
5 1 (8.33%) Developer/Software Engineer
5 1 (8.33%) Development Engineer
5 1 (8.33%) Front End Developer (Client-Side Developer)
5 1 (8.33%) React Developer
5 1 (8.33%) Software Development Engineer
5 1 (8.33%) Xamarin Developer
Libraries, Frameworks & Software Standards
1 5 (41.67%) .NET
2 4 (33.33%) AngularJS
2 4 (33.33%) ASP.NET Web API
2 4 (33.33%) CSS
2 4 (33.33%) HTML
3 3 (25.00%) React
3 3 (25.00%) RESTful
3 3 (25.00%) Twitter Bootstrap
4 2 (16.67%) .NET Core
4 2 (16.67%) .NET Framework
4 2 (16.67%) ASP.NET
4 2 (16.67%) CSS3
4 2 (16.67%) HTML5
4 2 (16.67%) jQuery
4 2 (16.67%) Node.js
4 2 (16.67%) RabbitMQ
4 2 (16.67%) Web Services
5 1 (8.33%) ASP.NET MVC
5 1 (8.33%) Entity Framework
5 1 (8.33%) REST
Miscellaneous
1 2 (16.67%) User Experience
2 1 (8.33%) Mobile App
Operating Systems
1 1 (8.33%) Linux
Processes & Methodologies
1 8 (66.67%) Agile Software Development
2 6 (50.00%) Continuous Integration
3 5 (41.67%) Acceptance Criteria
3 5 (41.67%) Analytics
3 5 (41.67%) Data Analytics
3 5 (41.67%) Due Diligence
3 5 (41.67%) Gamification
3 5 (41.67%) Process Improvement
3 5 (41.67%) Root Cause Analysis
3 5 (41.67%) Translating Business Requirements
4 4 (33.33%) MVC
5 3 (25.00%) BDD
6 2 (16.67%) Continuous Deployment
6 2 (16.67%) E-Commerce
6 2 (16.67%) Front End Development
6 2 (16.67%) High Availability
6 2 (16.67%) OO
6 2 (16.67%) Software Engineering
6 2 (16.67%) SOLID
7 1 (8.33%) Web Development
Programming Languages
1 5 (41.67%) C#
1 5 (41.67%) JavaScript
2 3 (25.00%) SQL
3 2 (16.67%) C
3 2 (16.67%) Java
4 1 (8.33%) C++
4 1 (8.33%) ES6
4 1 (8.33%) Groovy
4 1 (8.33%) Java 8
4 1 (8.33%) Python
4 1 (8.33%) Scala
4 1 (8.33%) TypeScript
4 1 (8.33%) XAML
System Software
1 1 (8.33%) Docker
Vendors
1 5 (41.67%) Microsoft
1 5 (41.67%) MicroStrategy
2 1 (8.33%) Oracle
2 1 (8.33%) Xamarin