Period
to 24 November 2017

The following table provides summary statistics for permanent job vacancies advertised in Letchworth 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 24 November 2017 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > Letchworth
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 8 10 20
Rank change year-on-year +2 +10 +9
Permanent jobs citing TDD 23 26 10
As % of all permanent IT jobs advertised in Letchworth 26.74% 31.33% 12.20%
As % of the Processes & Methodologies category 30.26% 34.21% 13.16%
Number of salaries quoted 22 24 10
Letchworth median annual salary £35,000 £33,500 £31,000
Median salary % change year-on-year +4.48% +8.06% -34.74%
10th Percentile £32,000 £19,750 £28,000
90th Percentile £42,500 £35,750 £34,850
Hertfordshire median annual salary £47,500 £50,000 £50,000
% change year-on-year -5.00% - +5.26%

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 Letchworth with a requirement for process or methodology skills.

All Process and Methodology Skills
Letchworth
Permanent vacancies with a requirement for process or methodology skills 76 76 76
As % of all permanent IT jobs advertised in Letchworth 88.37% 91.57% 92.68%
Number of salaries quoted 63 68 67
Letchworth median annual salary £37,500 £32,500 £37,500
Median salary % change year-on-year +15.38% -13.33% -2.60%
10th Percentile £25,000 £22,500 £23,500
90th Percentile £55,000 £43,750 £48,000
Hertfordshire median annual salary £47,500 £50,000 £47,500
% change year-on-year -5.00% +5.26% +3.26%

TDD
Job Vacancy Trend in Letchworth

Job postings citing TDD as a percentage of all IT jobs advertised in Letchworth.

Job vacancy trend for TDD in Letchworth

TDD
Salary Trend in Letchworth

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

Salary trend for TDD in Letchworth

For the 6 months to 24 November 2017, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the Letchworth region with a requirement for TDD.

1 23 (100.00%) C#
1 23 (100.00%) MVC
1 23 (100.00%) Agile Software Development
2 21 (91.30%) Unit Testing
2 21 (91.30%) Scrum
2 21 (91.30%) SQL
2 21 (91.30%) AngularJS
3 19 (82.61%) .NET
4 14 (60.87%) ASP.NET
5 13 (56.52%) ASP.NET Web API
6 12 (52.17%) Web Application Development
6 12 (52.17%) ASP.NET MVC
6 12 (52.17%) Microsoft
7 11 (47.83%) SQL Server
8 10 (43.48%) Team Foundation Server
9 5 (21.74%) Finance
9 5 (21.74%) Legal
9 5 (21.74%) Visual Studio
9 5 (21.74%) JavaScript
9 5 (21.74%) .NET Framework
9 5 (21.74%) NUnit
9 5 (21.74%) MSTest
9 5 (21.74%) Continuous Integration
9 5 (21.74%) Data Mapping
9 5 (21.74%) Entity Framework
9 5 (21.74%) SQL Server 2012
9 5 (21.74%) ATDD
9 5 (21.74%) Jasmine
9 5 (21.74%) Protractor
9 5 (21.74%) Collaborative Working

TDD
Co-occurring IT Skills in Letchworth 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:

Database & Business Intelligence
1 11 (47.83%) SQL Server
2 5 (21.74%) SQL Server 2012
3 1 (4.35%) NoSQL
3 1 (4.35%) SQL Server 2016
Development Applications
1 10 (43.48%) Team Foundation Server
2 5 (21.74%) Jasmine
2 5 (21.74%) MSTest
2 5 (21.74%) NUnit
2 5 (21.74%) Protractor
2 5 (21.74%) Visual Studio
3 1 (4.35%) Git (software)
General
1 5 (21.74%) Finance
1 5 (21.74%) Legal
Job Titles
1 23 (100.00%) Developer
2 14 (60.87%) C# Developer
3 13 (56.52%) .NET Developer
4 7 (30.43%) ASP.NET Developer
5 5 (21.74%) C# .NET Developer
5 5 (21.74%) C# ASP.NET Developer
6 4 (17.39%) ASP.NET MVC Developer
Libraries, Frameworks & Software Standards
1 21 (91.30%) AngularJS
2 19 (82.61%) .NET
3 14 (60.87%) ASP.NET
4 13 (56.52%) ASP.NET Web API
5 12 (52.17%) ASP.NET MVC
6 5 (21.74%) .NET Framework
6 5 (21.74%) Entity Framework
7 1 (4.35%) ASP.NET MVC 5
7 1 (4.35%) Node.js
7 1 (4.35%) RESTful
7 1 (4.35%) WCF
Processes & Methodologies
1 23 (100.00%) Agile Software Development
1 23 (100.00%) MVC
2 21 (91.30%) Scrum
2 21 (91.30%) Unit Testing
3 12 (52.17%) Web Application Development
4 5 (21.74%) ATDD
4 5 (21.74%) Collaborative Working
4 5 (21.74%) Continuous Integration
4 5 (21.74%) Data Mapping
5 1 (4.35%) BDD
5 1 (4.35%) Business Intelligence
5 1 (4.35%) Web Development
Programming Languages
1 23 (100.00%) C#
2 21 (91.30%) SQL
3 5 (21.74%) JavaScript
4 1 (4.35%) Ruby
Vendors
1 12 (52.17%) Microsoft