Period
to 17 November 2017

The following table provides summary statistics for contract job vacancies advertised in Osterley 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 17 November 2017 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)
Hounslow > Osterley
6 months to
17 Nov 2017
Same period 2016 Same period 2015
Rank 6 5 5
Rank change year-on-year -1 0 -2
Contract jobs citing TDD 9 4 1
As % of all contract IT jobs advertised in Osterley 25.00% 28.57% 14.29%
As % of the Processes & Methodologies category 25.71% 30.77% 14.29%
Number of daily rates quoted 11 4 1
Osterley median daily rate £411 £515 £550
Median daily rate % change year-on-year -20.29% -6.36% +17.65%
Hounslow median daily rate £525 £425 £350
% change year-on-year +23.53% +21.43% -23.71%
Number of hourly rates quoted 0 0 0
Osterley median hourly rate - - -
Hounslow median hourly rate - £55.00 -

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 Osterley with a requirement for process or methodology skills.

All Process and Methodology Skills
Osterley
Contract vacancies with a requirement for process or methodology skills 35 13 7
As % of all contract IT jobs advertised in Osterley 97.22% 92.86% 100.00%
Number of daily rates quoted 27 13 6
Osterley median daily rate £450 £445 £451
Median daily rate % change year-on-year +1.12% -1.39% +7.44%
10th Percentile £294 £180 £410
90th Percentile £570 £548 £532
Hounslow median daily rate £475 £440 £405
% change year-on-year +7.95% +8.64% -3.57%
Number of hourly rates quoted 0 0 0
Osterley median hourly rate - - -
Hounslow median hourly rate £16.50 £23.00 £20.00
% change year-on-year -28.26% +15.00% -42.86%

TDD
Job Vacancy Trend in Osterley

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

Job vacancy trend for TDD in Osterley

TDD
Contractor Daily Rate Trend in Osterley

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

Contractor daily rate trend for TDD in Osterley

For the 6 months to 17 November 2017, IT contractor jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Osterley region with a requirement for TDD.

1 9 (100.00%) Scrum
2 7 (77.78%) RESTful
3 6 (66.67%) Test Automation
3 6 (66.67%) Functional Testing
3 6 (66.67%) Shell Script
3 6 (66.67%) Agile Software Development
3 6 (66.67%) Xcode
3 6 (66.67%) JSON
3 6 (66.67%) Apple Swift
3 6 (66.67%) Exploratory Testing
3 6 (66.67%) Acceptance Criteria
4 5 (55.56%) Linux Command Line
4 5 (55.56%) Velocity
4 5 (55.56%) Release Management
4 5 (55.56%) Ruby
4 5 (55.56%) Video\Live Streaming
4 5 (55.56%) Web Services
4 5 (55.56%) XML
4 5 (55.56%) Unix
4 5 (55.56%) Continuous Improvement
4 5 (55.56%) Gherkin
4 5 (55.56%) ATDD
4 5 (55.56%) Scrum-ban
4 5 (55.56%) Xamarin
4 5 (55.56%) User Stories
4 5 (55.56%) Mobile App
4 5 (55.56%) Calabash
4 5 (55.56%) Degree
4 5 (55.56%) Video on Demand
4 5 (55.56%) BDD

TDD
Co-occurring IT Skills in Osterley 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 1 (11.11%) CMS
Cloud Services
1 1 (11.11%) GitHub
1 1 (11.11%) Google Play
Development Applications
1 6 (66.67%) Xcode
2 5 (55.56%) Calabash
3 4 (44.44%) Appium
3 4 (44.44%) Cucumber
4 1 (11.11%) CruiseControl
4 1 (11.11%) Jenkins
4 1 (11.11%) TeamCity
General
1 1 (11.11%) Publishing
Job Titles
1 8 (88.89%) Developer
2 5 (55.56%) Developer in Test
3 4 (44.44%) Mobile Developer
3 4 (44.44%) Ruby Developer
4 2 (22.22%) iOS Developer
4 2 (22.22%) JavaScript Developer
4 2 (22.22%) Objective-C Developer
5 1 (11.11%) Automation Tester
5 1 (11.11%) C# Developer
5 1 (11.11%) Tester
Libraries, Frameworks & Software Standards
1 7 (77.78%) RESTful
2 6 (66.67%) JSON
3 5 (55.56%) Gherkin
3 5 (55.56%) Velocity
3 5 (55.56%) Web Services
3 5 (55.56%) XML
4 2 (22.22%) Cocoa
4 2 (22.22%) React Native
5 1 (11.11%) OAuth
5 1 (11.11%) Unity (Game Engine)
5 1 (11.11%) Unity DI Container
Miscellaneous
1 5 (55.56%) Linux Command Line
1 5 (55.56%) Mobile App
1 5 (55.56%) Video on Demand
1 5 (55.56%) Video\Live Streaming
2 2 (22.22%) iPad
2 2 (22.22%) iPhone
2 2 (22.22%) User Experience
3 1 (11.11%) Oculus Rift
Operating Systems
1 5 (55.56%) Unix
2 3 (33.33%) Apple iOS
3 1 (11.11%) Android
3 1 (11.11%) Linux
Processes & Methodologies
1 9 (100.00%) Scrum
2 6 (66.67%) Acceptance Criteria
2 6 (66.67%) Agile Software Development
2 6 (66.67%) Exploratory Testing
2 6 (66.67%) Functional Testing
2 6 (66.67%) Test Automation
3 5 (55.56%) ATDD
3 5 (55.56%) BDD
3 5 (55.56%) Continuous Improvement
3 5 (55.56%) Kanban
3 5 (55.56%) Manual Testing
3 5 (55.56%) Release Management
3 5 (55.56%) Scrum-ban
3 5 (55.56%) User Stories
4 4 (44.44%) Mobile Development
5 3 (33.33%) OO
5 3 (33.33%) OOD
5 3 (33.33%) Software Engineering
5 3 (33.33%) SOLID
6 2 (22.22%) iOS Development
Programming Languages
1 6 (66.67%) Apple Swift
1 6 (66.67%) Shell Script
2 5 (55.56%) Ruby
3 2 (22.22%) JavaScript
3 2 (22.22%) Objective-C
4 1 (11.11%) C#
4 1 (11.11%) Python
Qualifications
1 5 (55.56%) Degree
Vendors
1 5 (55.56%) Xamarin
2 3 (33.33%) Apple
3 1 (11.11%) Google
3 1 (11.11%) Microsoft