The following table provides summary statistics for contract job vacancies advertised in Hounslow 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 27 June 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)
London / Hounslow
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 3 - 4
Rank change year-on-year - 0  
Contract jobs citing TDD 1 0 2
As % of all contract IT jobs advertised in Hounslow 10.00% - 7.69%
As % of the Processes & Methodologies category 14.29% - 15.38%
Number of daily rates quoted 1 0 1
Median daily rate £600 - £490
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £40.00 £43.75
% change year-on-year +3.75% -8.57%  

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 Hounslow with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Hounslow
Contract job vacancies with a requirement for process and methodology skills 7 19 13
As % of all contract IT job vacancies advertised in Hounslow 70.00% 67.86% 50.00%
Number of daily rates quoted 2 11 6
Median daily rate £600 £500 £490
Median daily rate % change year-on-year +20.00% +2.04%  
UK excluding London median daily rate £415 £400 £385
% change year-on-year +3.75% +3.89%  
Number of hourly rates quoted 0 0 1
Median hourly rate - - £13.00
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in Hounslow

The job posting trend of jobs advertised in Hounslow 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 Hounslow

TDD
Contractor Daily Rate Trend in Hounslow

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

Contractor daily rate trend for TDD in Hounslow

For the 6 months to 27 June 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 Hounslow region with a requirement for TDD.

1 1 (100.00%) MySQL
1 1 (100.00%) Python
1 1 (100.00%) Data Modelling
1 1 (100.00%) RDBMS
1 1 (100.00%) PostgreSQL
1 1 (100.00%) Agile Software Development
1 1 (100.00%) Web Development
1 1 (100.00%) Continuous Integration
1 1 (100.00%) Security Cleared
1 1 (100.00%) Git (software)
1 1 (100.00%) RESTful
1 1 (100.00%) BDD
1 1 (100.00%) NoSQL
1 1 (100.00%) Parallel Processing
1 1 (100.00%) Node.js
1 1 (100.00%) User Stories
1 1 (100.00%) Relational Database
1 1 (100.00%) Docker
1 1 (100.00%) DevOps
1 1 (100.00%) Microservices
1 1 (100.00%) Kubernetes
1 1 (100.00%) Software Delivery
1 1 (100.00%) Continuous Deployment

TDD
Co-occurring IT Skills in Hounslow 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 1 (100.00%) MySQL
1 1 (100.00%) NoSQL
1 1 (100.00%) PostgreSQL
1 1 (100.00%) RDBMS
1 1 (100.00%) Relational Database
Development Applications
1 1 (100.00%) Git (software)
Job Titles
1 1 (100.00%) Developer
1 1 (100.00%) Senior Developer
1 1 (100.00%) Senior Web Developer
1 1 (100.00%) Web Developer
Libraries, Frameworks & Software Standards
1 1 (100.00%) Node.js
1 1 (100.00%) RESTful
Processes & Methodologies
1 1 (100.00%) Agile Software Development
1 1 (100.00%) BDD
1 1 (100.00%) Continuous Deployment
1 1 (100.00%) Continuous Integration
1 1 (100.00%) Data Modelling
1 1 (100.00%) DevOps
1 1 (100.00%) Microservices
1 1 (100.00%) Parallel Processing
1 1 (100.00%) Software Delivery
1 1 (100.00%) User Stories
1 1 (100.00%) Web Development
Programming Languages
1 1 (100.00%) Python
Qualifications
1 1 (100.00%) Security Cleared
System Software
1 1 (100.00%) Docker
Systems Management
1 1 (100.00%) Kubernetes