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 3 months to 25 March 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.

3 months to
25 Mar 2017
Same period 2016 Same period 2015
Test-Driven Development (TDD)
London / Osterley
Rank 2 5 1
Rank change year-on-year +3 -4  
Contract jobs citing TDD 4 1 1
As % of all contract IT jobs advertised in Osterley 66.67% 12.50% 50.00%
As % of the Processes & Methodologies category 66.67% 12.50% 100.00%
Number of daily rates quoted 2 1 1
Median daily rate £465 £400 £320
Median daily rate % change year-on-year +16.25% +25.00%  
UK excluding London median daily rate £405 £400 £375
% change year-on-year +1.25% +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £39.00 £45.75 £36.00
% change year-on-year -14.75% +27.08%  

TDD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Osterley with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Osterley
Contract job vacancies with a requirement for process and methodology skills 6 8 1
As % of all contract IT job vacancies advertised in Osterley 100.00% 100.00% 50.00%
Number of daily rates quoted 2 7 1
Median daily rate £450 £470 £320
Median daily rate % change year-on-year -4.25% +46.87%  
UK excluding London median daily rate £410 £400 £400
% change year-on-year +2.50% +0.06%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £36.00 £38.75 £30.00
% change year-on-year -7.09% +29.16%  

TDD
Job Vacancy Trend in Osterley

The job posting trend of jobs advertised in Osterley citing TDD as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

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

TDD
Top 21 Related IT Skills in Osterley

For the 6 months to 25 March 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 4 (100.00%) Linux
1 4 (100.00%) Agile Software Development
1 4 (100.00%) Pair Programming
2 3 (75.00%) CruiseControl
2 3 (75.00%) JSON
2 3 (75.00%) Python
2 3 (75.00%) Shell Script
2 3 (75.00%) Regression Testing
2 3 (75.00%) Scrum
2 3 (75.00%) Continuous Integration
2 3 (75.00%) TeamCity
2 3 (75.00%) Test Automation
2 3 (75.00%) Functional Testing
2 3 (75.00%) Jenkins
2 3 (75.00%) Exploratory Testing
3 2 (50.00%) Kalman Filter
4 1 (25.00%) Continuous Improvement
4 1 (25.00%) Open Source
4 1 (25.00%) C++
4 1 (25.00%) QA
4 1 (25.00%) Degree

TDD
Top Related 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:

Development Applications
1 3 (75.00%) CruiseControl
1 3 (75.00%) Jenkins
1 3 (75.00%) TeamCity
Job Titles
1 3 (75.00%) Automation Tester
1 3 (75.00%) Tester
2 1 (25.00%) C++ Developer
2 1 (25.00%) C++ Software Developer
2 1 (25.00%) Developer
2 1 (25.00%) Senior C++ Developer
2 1 (25.00%) Senior Developer
2 1 (25.00%) Senior Software Developer
2 1 (25.00%) Software Developer
Libraries, Frameworks & Software Standards
1 3 (75.00%) JSON
Operating Systems
1 4 (100.00%) Linux
Processes & Methodologies
1 4 (100.00%) Agile Software Development
1 4 (100.00%) Pair Programming
2 3 (75.00%) Continuous Integration
2 3 (75.00%) Exploratory Testing
2 3 (75.00%) Functional Testing
2 3 (75.00%) Regression Testing
2 3 (75.00%) Scrum
2 3 (75.00%) Test Automation
3 2 (50.00%) Kalman Filter
4 1 (25.00%) Continuous Improvement
4 1 (25.00%) Open Source
Programming Languages
1 3 (75.00%) Python
1 3 (75.00%) Shell Script
2 1 (25.00%) C++
Qualifications
1 1 (25.00%) Degree
Quality Assurance & Compliance
1 1 (25.00%) QA