Period
to 16 January 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 16 January 2018 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Hertfordshire > Welwyn Garden City
6 months to
16 Jan 2018
Same period 2017 Same period 2016
Rank 40 28 13
Rank change year-on-year -12 -15 +8
Permanent jobs citing TDD 6 9 27
As % of all permanent IT jobs advertised in Welwyn Garden City 2.29% 4.09% 13.17%
As % of the Processes & Methodologies category 2.41% 4.31% 14.36%
Number of salaries quoted 1 9 27
Welwyn Garden City median annual salary £60,000 £70,000 £75,000
Median salary % change year-on-year -14.29% -6.67% +25.00%
10th Percentile £55,000 £63,500 £72,500
90th Percentile £65,000 £77,500 £100,000
Hertfordshire median annual salary £50,000 £45,000 £52,500
% change year-on-year +11.11% -14.29% +10.53%

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 249 209 188
As % of all permanent IT jobs advertised in Welwyn Garden City 95.04% 95.00% 91.71%
Number of salaries quoted 143 176 141
Welwyn Garden City median annual salary £45,000 £45,000 £57,500
Median salary % change year-on-year - -21.74% +35.29%
10th Percentile £26,500 £25,500 £27,500
90th Percentile £67,000 £75,000 £77,500
Hertfordshire median annual salary £50,000 £50,000 £47,500
% change year-on-year - +5.26% -

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

For the 6 months to 16 January 2018, 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 Welwyn Garden City region with a requirement for TDD.

1 6 (100.00%) Continuous Integration
2 5 (83.33%) BDD
2 5 (83.33%) Root Cause Analysis
2 5 (83.33%) Concurrent Programming
2 5 (83.33%) Secure Coding
2 5 (83.33%) SOLID
2 5 (83.33%) Smoke Testing
2 5 (83.33%) Domain Models
2 5 (83.33%) Java
2 5 (83.33%) Agile Software Development
2 5 (83.33%) Software Engineering
3 1 (16.67%) Retail
3 1 (16.67%) Continuous Improvement

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:

General
1 1 (16.67%) Retail
Job Titles
1 5 (83.33%) Development Engineer
1 5 (83.33%) Software Development Engineer
1 5 (83.33%) Software Engineer
2 1 (16.67%) Development Manager
2 1 (16.67%) Software Development Manager
2 1 (16.67%) Software Manager
Processes & Methodologies
1 6 (100.00%) Continuous Integration
2 5 (83.33%) Agile Software Development
2 5 (83.33%) BDD
2 5 (83.33%) Concurrent Programming
2 5 (83.33%) Domain Models
2 5 (83.33%) Root Cause Analysis
2 5 (83.33%) Secure Coding
2 5 (83.33%) Smoke Testing
2 5 (83.33%) Software Engineering
2 5 (83.33%) SOLID
3 1 (16.67%) Continuous Improvement
Programming Languages
1 5 (83.33%) Java