Period
to 24 September 2018

The following table provides summary statistics for contract job vacancies advertised in Twickenham with a requirement for TDD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited TDD over the 6 months to 24 September 2018 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Test-Driven Development (TDD)
6 months to
24 Sep 2018
Same period 2017 Same period 2016
Rank 11 6 -
Rank change year-on-year -5 - +6
Contract jobs citing TDD 3 4 0
As % of all contract IT jobs advertised in Twickenham 8.57% 12.90% -
As % of the Processes & Methodologies category 10.34% 14.29% -
Number of daily rates quoted 3 4 0
Twickenham median daily rate £550 £438 -
Median daily rate % change year-on-year +25.71% - -
Richmond upon Thames median daily rate £490 £450 £325
% change year-on-year +8.89% +38.46% -27.78%
Number of hourly rates quoted 0 0 0
Twickenham median hourly rate - - -
Richmond upon Thames median hourly rate - - -

TDD is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Twickenham with a requirement for process or methodology skills.

All Process and Methodology Skills
Twickenham
Contract vacancies with a requirement for process or methodology skills 29 28 36
As % of all contract IT jobs advertised in Twickenham 82.86% 90.32% 69.23%
Number of daily rates quoted 22 20 29
Twickenham median daily rate £423 £375 £425
Median daily rate % change year-on-year +12.67% -11.76% +13.33%
10th Percentile £350 £218 £170
90th Percentile £537 £467 £518
Richmond upon Thames median daily rate £475 £400 £363
% change year-on-year +18.75% +10.34% +7.41%
Number of hourly rates quoted 2 2 3
Twickenham median hourly rate £16.15 £33.25 £22.00
Median hourly rate % change year-on-year -51.44% +51.14% -
10th Percentile £11.71 £21.73 £20.80
90th Percentile £20.30 £45.78 £23.00
Richmond upon Thames median hourly rate £16.15 £19.00 £22.00
% change year-on-year -15.01% -13.64% -

TDD
Job Vacancy Trend in Twickenham

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

Job vacancy trend for TDD in Twickenham

TDD
Contractor Daily Rate Trend in Twickenham

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing TDD in Twickenham.

Contractor daily rate trend for TDD in Twickenham

For the 6 months to 24 September 2018, IT contractor 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 contract job ads across the Twickenham region with a requirement for TDD.

1 3 (100.00%) C#
1 3 (100.00%) .NET
1 3 (100.00%) Agile Software Development
1 3 (100.00%) BDD
1 3 (100.00%) AngularJS
1 3 (100.00%) TypeScript
2 2 (66.67%) Continuous Delivery
2 2 (66.67%) .NET Core
2 2 (66.67%) Amazon AWS
2 2 (66.67%) Octopus Deploy
2 2 (66.67%) NoSQL
2 2 (66.67%) Git (software)
2 2 (66.67%) Scrum
2 2 (66.67%) Java
2 2 (66.67%) JavaScript
2 2 (66.67%) SQL
3 1 (33.33%) Test Automation
3 1 (33.33%) Microsoft Azure
3 1 (33.33%) Visual Studio Team System
3 1 (33.33%) REST
3 1 (33.33%) ATDD
3 1 (33.33%) DevOps
3 1 (33.33%) Microservices

TDD
Co-occurring IT Skills in Twickenham 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:

Cloud Services
1 2 (66.67%) Amazon AWS
2 1 (33.33%) Microsoft Azure
Database & Business Intelligence
1 2 (66.67%) NoSQL
Development Applications
1 2 (66.67%) Git (software)
1 2 (66.67%) Octopus Deploy
2 1 (33.33%) Visual Studio Team System
Job Titles
1 3 (100.00%) Developer
1 3 (100.00%) Full Stack Developer
2 2 (66.67%) .NET Developer
2 2 (66.67%) Java Developer
Libraries, Frameworks & Software Standards
1 3 (100.00%) .NET
1 3 (100.00%) AngularJS
2 2 (66.67%) .NET Core
3 1 (33.33%) REST
Processes & Methodologies
1 3 (100.00%) Agile Software Development
1 3 (100.00%) BDD
2 2 (66.67%) Continuous Delivery
2 2 (66.67%) Scrum
3 1 (33.33%) ATDD
3 1 (33.33%) DevOps
3 1 (33.33%) Microservices
3 1 (33.33%) Test Automation
Programming Languages
1 3 (100.00%) C#
1 3 (100.00%) TypeScript
2 2 (66.67%) Java
2 2 (66.67%) JavaScript
2 2 (66.67%) SQL