Period
to 18 November 2017

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 6 months to 18 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)
West London > Hounslow
6 months to
18 Nov 2017
Same period 2016 Same period 2015
Rank 3 20 30
Rank change year-on-year +17 +10 -15
Contract jobs citing TDD 53 13 9
As % of all contract IT jobs advertised in Hounslow 17.55% 4.30% 2.69%
As % of the Processes & Methodologies category 20.31% 4.96% 3.33%
Number of daily rates quoted 51 12 7
Hounslow median daily rate £525 £425 £350
Median daily rate % change year-on-year +23.53% +21.43% -25.33%
10th Percentile £393 £346 £296
90th Percentile £575 £548 £508
West London median daily rate £518 £475 £450
% change year-on-year +8.95% +5.56% +8.76%
Number of hourly rates quoted 0 1 0
Hounslow median hourly rate - £55.00 -
West London median hourly rate - £55.00 £45.00
% change year-on-year - +22.22% -

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 Hounslow with a requirement for process or methodology skills.

All Process and Methodology Skills
Hounslow
Contract vacancies with a requirement for process or methodology skills 261 262 270
As % of all contract IT jobs advertised in Hounslow 86.42% 86.75% 80.60%
Number of daily rates quoted 162 157 201
Hounslow median daily rate £475 £440 £405
Median daily rate % change year-on-year +7.95% +8.64% -3.57%
10th Percentile £280 £232 £281
90th Percentile £585 £566 £515
West London median daily rate £450 £420 £400
% change year-on-year +7.14% +5.00% -
Number of hourly rates quoted 5 15 9
Hounslow median hourly rate £16.50 £23.00 £20.00
Median hourly rate % change year-on-year -28.26% +15.00% -42.86%
10th Percentile £12.00 £10.20 £15.83
90th Percentile £122.90 £65.94 £33.15
West London median hourly rate £23.00 £22.00 £22.00
% change year-on-year +4.55% - +33.33%

TDD
Job Vacancy Trend in Hounslow

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

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

TDD
Contractor Daily Rate Histogram in Hounslow

The daily rate distribution of IT jobs citing TDD in Hounslow over the 6 months to 18 November 2017.

Contractor daily rate histogram for TDD in Hounslow

TDD
Contract Job Locations in Hounslow

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Hounslow region over the 6 months to 18 November 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Isleworth - 40 £525 - 4
Osterley -1 9 £411 -20.29%
Feltham +2 3 £469 +10.29%
TDD
West London

For the 6 months to 18 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 Hounslow region with a requirement for TDD.

1 49 (92.45%) Agile Software Development
2 31 (58.49%) Pair Programming
3 29 (54.72%) RESTful
3 29 (54.72%) BDD
4 25 (47.17%) Continuous Improvement
5 24 (45.28%) Continuous Integration
5 24 (45.28%) Web Services
6 23 (43.40%) NoSQL
7 22 (41.51%) User Stories
7 22 (41.51%) Java
8 20 (37.74%) Test Automation
9 19 (35.85%) Continuous Delivery
10 18 (33.96%) CSS
11 17 (32.08%) Git (software)
11 17 (32.08%) Acceptance Criteria
12 16 (30.19%) High Availability
12 16 (30.19%) Unix
13 15 (28.30%) Scrum
14 14 (26.42%) Spring
14 14 (26.42%) Cucumber
15 13 (24.53%) Software Engineering
15 13 (24.53%) Shell Script
15 13 (24.53%) JUnit
16 12 (22.64%) JavaScript
16 12 (22.64%) Kanban
16 12 (22.64%) Performance Tuning
17 11 (20.75%) Microservices
17 11 (20.75%) Ruby
18 10 (18.87%) Degree
18 10 (18.87%) SQL

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:

Application Platforms
1 5 (9.43%) Elasticsearch
2 4 (7.55%) Apache
3 1 (1.89%) Apache Solr
3 1 (1.89%) CMS
Cloud Services
1 6 (11.32%) Amazon AWS
2 1 (1.89%) GitHub
2 1 (1.89%) Google Play
Communications & Networking
1 4 (7.55%) HTTP
1 4 (7.55%) Internet
1 4 (7.55%) TCP/IP
Database & Business Intelligence
1 23 (43.40%) NoSQL
2 8 (15.09%) Apache Cassandra
3 5 (9.43%) MongoDB
4 3 (5.66%) MySQL
4 3 (5.66%) PostgreSQL
4 3 (5.66%) RDBMS
4 3 (5.66%) Relational Database
Development Applications
1 17 (32.08%) Git (software)
2 14 (26.42%) Cucumber
3 13 (24.53%) JUnit
4 9 (16.98%) Mockito
5 7 (13.21%) Calabash
5 7 (13.21%) Xcode
6 6 (11.32%) Jenkins
7 5 (9.43%) Appium
7 5 (9.43%) Gradle
7 5 (9.43%) IntelliJ
8 4 (7.55%) JMeter
9 2 (3.77%) Jasmine
10 1 (1.89%) CruiseControl
10 1 (1.89%) Hudson
10 1 (1.89%) TeamCity
General
1 5 (9.43%) Games
2 2 (3.77%) Electronics
2 2 (3.77%) Finance
2 2 (3.77%) Manufacturing
2 2 (3.77%) Marketing
2 2 (3.77%) Telecoms
3 1 (1.89%) Publishing
Job Titles
1 48 (90.57%) Developer
2 17 (32.08%) Java Developer
3 8 (15.09%) Senior Developer
4 7 (13.21%) Developer in Test
4 7 (13.21%) Senior Java Developer
5 6 (11.32%) Mobile Developer
5 6 (11.32%) Ruby Developer
6 3 (5.66%) Angular Developer
7 2 (3.77%) Agile Developer
7 2 (3.77%) DevOps Developer
7 2 (3.77%) Front End Developer (Client-Side Developer)
7 2 (3.77%) Full Stack Developer
7 2 (3.77%) iOS Developer
7 2 (3.77%) JavaScript Developer
7 2 (3.77%) Node.js Developer
7 2 (3.77%) Objective-C Developer
7 2 (3.77%) Python Developer
8 1 (1.89%) C# Developer
8 1 (1.89%) C++ Developer
8 1 (1.89%) Senior Web Developer
Libraries, Frameworks & Software Standards
1 29 (54.72%) RESTful
2 24 (45.28%) Web Services
3 18 (33.96%) CSS
4 14 (26.42%) Spring
5 10 (18.87%) CSS3
5 10 (18.87%) HTML
5 10 (18.87%) HTML5
6 9 (16.98%) Dropwizard
7 8 (15.09%) JSON
7 8 (15.09%) Redux
8 7 (13.21%) Gherkin
8 7 (13.21%) Velocity
8 7 (13.21%) XML
9 6 (11.32%) Grails
9 6 (11.32%) Node.js
9 6 (11.32%) React
10 5 (9.43%) Elastic Stack
10 5 (9.43%) Spring MVC
11 4 (7.55%) Guice
11 4 (7.55%) REST
Miscellaneous
1 7 (13.21%) Linux Command Line
1 7 (13.21%) Mobile App
1 7 (13.21%) Video on Demand
1 7 (13.21%) Video\Live Streaming
2 3 (5.66%) Analytical Skills
2 3 (5.66%) Data Structures
3 2 (3.77%) iPad
3 2 (3.77%) iPhone
3 2 (3.77%) User Experience
4 1 (1.89%) Oculus Rift
Operating Systems
1 16 (30.19%) Unix
2 9 (16.98%) Linux
3 3 (5.66%) Apple iOS
4 1 (1.89%) Android
Processes & Methodologies
1 49 (92.45%) Agile Software Development
2 31 (58.49%) Pair Programming
3 29 (54.72%) BDD
4 25 (47.17%) Continuous Improvement
5 24 (45.28%) Continuous Integration
6 22 (41.51%) User Stories
7 20 (37.74%) Test Automation
8 19 (35.85%) Continuous Delivery
9 17 (32.08%) Acceptance Criteria
10 16 (30.19%) High Availability
11 15 (28.30%) Scrum
12 13 (24.53%) Software Engineering
13 12 (22.64%) Kanban
13 12 (22.64%) Performance Tuning
14 11 (20.75%) Microservices
15 9 (16.98%) Open Source
16 8 (15.09%) DevOps
16 8 (15.09%) Exploratory Testing
16 8 (15.09%) Functional Testing
16 8 (15.09%) Release Management
Programming Languages
1 22 (41.51%) Java
2 13 (24.53%) Shell Script
3 12 (22.64%) JavaScript
4 11 (20.75%) Ruby
5 10 (18.87%) Groovy
5 10 (18.87%) Scala
5 10 (18.87%) SQL
6 9 (16.98%) Python
7 7 (13.21%) Apple Swift
8 5 (9.43%) Bash Shell
8 5 (9.43%) Kotlin
9 2 (3.77%) Objective-C
10 1 (1.89%) C#
10 1 (1.89%) C++
Qualifications
1 10 (18.87%) Degree
2 3 (5.66%) Security Cleared
3 2 (3.77%) SC Cleared
Quality Assurance & Compliance
1 8 (15.09%) QA
2 2 (3.77%) Data Quality
System Software
1 9 (16.98%) Docker
Systems Management
1 9 (16.98%) Kubernetes
2 5 (9.43%) Grafana
2 5 (9.43%) Kibana
2 5 (9.43%) logstash
Vendors
1 7 (13.21%) Apple
1 7 (13.21%) Xamarin
2 5 (9.43%) AppDynamics
2 5 (9.43%) Splunk
3 2 (3.77%) SAP
4 1 (1.89%) Google
4 1 (1.89%) Microsoft