Period
to 15 February 2019

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 15 February 2019 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
15 Feb 2019
Same period 2018 Same period 2017
Rank 15 3 23
Rank change year-on-year -12 +20 0
Contract jobs citing TDD 32 75 4
As % of all contract IT jobs advertised in Hounslow 8.89% 24.35% 2.12%
As % of the Processes & Methodologies category 9.70% 26.98% 2.48%
Number of daily rates quoted 25 71 2
Hounslow median daily rate £550 £525 £425
Median daily rate % change year-on-year +4.76% +23.53% +6.25%
10th Percentile £488 £393 £413
90th Percentile £599 £613 £438
West London median daily rate £525 £525 £475
% change year-on-year - +10.53% +0.53%
Number of hourly rates quoted 0 0 0
Hounslow median hourly rate - - -
West London 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 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 330 278 161
As % of all contract IT jobs advertised in Hounslow 91.67% 90.26% 85.19%
Number of daily rates quoted 201 185 79
Hounslow median daily rate £500 £500 £425
Median daily rate % change year-on-year - +17.65% +1.19%
10th Percentile £238 £255 £205
90th Percentile £600 £596 £525
West London median daily rate £450 £463 £420
% change year-on-year -2.70% +10.12% -0.59%
Number of hourly rates quoted 20 8 9
Hounslow median hourly rate £27.38 £33.00 £25.00
Median hourly rate % change year-on-year -17.05% +32.00% +25.00%
10th Percentile £10.75 £16.10 £8.50
90th Percentile £115.00 £45.19 £72.50
West London median hourly rate £42.50 £31.25 £25.00
% change year-on-year +36.00% +25.00% +16.28%

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 15 February 2019.

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 15 February 2019. 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
Osterley +1 11 £500 +21.80%
Feltham 0 9 £550 +30.95% 1
Chiswick -1 4 £519 -1.19%
Brentford -9 2 £565 - 1
Isleworth -6 1 £525 -1.87% 3
TDD
West London

For the 6 months to 15 February 2019, 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 Hounslow region with a requirement for TDD.

1 26 (81.25%) Agile Software Development
2 17 (53.13%) Java
3 16 (50.00%) Pair Programming
4 12 (37.50%) Microservices
5 11 (34.38%) Test Automation
6 10 (31.25%) Continuous Integration
6 10 (31.25%) Scrum
6 10 (31.25%) Software Engineering
7 9 (28.13%) Unit Testing
7 9 (28.13%) Python
7 9 (28.13%) Amazon AWS
8 8 (25.00%) Git (software)
8 8 (25.00%) BDD
8 8 (25.00%) Big Data
8 8 (25.00%) GitHub
8 8 (25.00%) Docker
8 8 (25.00%) RESTful
8 8 (25.00%) QA
8 8 (25.00%) Acceptance Criteria
9 7 (21.88%) GitLab
9 7 (21.88%) DevOps
10 6 (18.75%) Jenkins
10 6 (18.75%) Defensive Programming
10 6 (18.75%) Open Source
10 6 (18.75%) Linux
10 6 (18.75%) Public Cloud
10 6 (18.75%) React
11 5 (15.63%) Continuous Deployment
11 5 (15.63%) JavaScript
11 5 (15.63%) JUnit

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 4 (12.50%) Apache
2 3 (9.38%) Apache Spark
3 1 (3.13%) Apache Solr
3 1 (3.13%) CMS
3 1 (3.13%) Elasticsearch
3 1 (3.13%) SAS
Cloud Services
1 9 (28.13%) Amazon AWS
2 8 (25.00%) GitHub
3 3 (9.38%) Amazon S3
Communications & Networking
1 5 (15.63%) HTTP
2 3 (9.38%) TCP/IP
Database & Business Intelligence
1 8 (25.00%) Big Data
2 4 (12.50%) Apache Cassandra
3 3 (9.38%) PostgreSQL
4 2 (6.25%) Apache Hive
4 2 (6.25%) Hadoop
4 2 (6.25%) Impala
4 2 (6.25%) MongoDB
4 2 (6.25%) Redis
5 1 (3.13%) Data Lake
5 1 (3.13%) Data Warehouse
5 1 (3.13%) Flink
5 1 (3.13%) HBase
5 1 (3.13%) NoSQL
5 1 (3.13%) SQL Server
Development Applications
1 8 (25.00%) Git (software)
2 7 (21.88%) GitLab
3 6 (18.75%) Jenkins
4 5 (15.63%) JUnit
5 4 (12.50%) CircleCI
5 4 (12.50%) Mockito
6 3 (9.38%) Mocha
7 2 (6.25%) Gradle
7 2 (6.25%) Jasmine
7 2 (6.25%) TeamCity
8 1 (3.13%) Appium
8 1 (3.13%) CocoaPods
8 1 (3.13%) Cucumber
8 1 (3.13%) fastlane
8 1 (3.13%) Gatling
8 1 (3.13%) Karma Test Runner
8 1 (3.13%) Maven
8 1 (3.13%) Travis CI
General
1 1 (3.13%) Publishing
Job Titles
1 28 (87.50%) Developer
2 14 (43.75%) Java Developer
3 6 (18.75%) Agile Developer
3 6 (18.75%) Agile Java Developer
3 6 (18.75%) Senior Developer
4 5 (15.63%) AWS Engineer
4 5 (15.63%) Backend Developer
4 5 (15.63%) Big Data Developer
4 5 (15.63%) Django Developer
4 5 (15.63%) Python Developer
4 5 (15.63%) Python/Django Developer
4 5 (15.63%) Software Engineer
5 4 (12.50%) AWS Developer
5 4 (12.50%) AWS Software Engineer
5 4 (12.50%) Big Data Engineer
5 4 (12.50%) Java Engineer
5 4 (12.50%) Java Software Developer
5 4 (12.50%) Java Software Engineer
5 4 (12.50%) Python Software Engineer
5 4 (12.50%) Software Developer
Libraries, Frameworks & Software Standards
1 8 (25.00%) RESTful
2 6 (18.75%) React
3 5 (15.63%) Django
3 5 (15.63%) Kafka
3 5 (15.63%) REST
3 5 (15.63%) Web Services
4 4 (12.50%) Qt
4 4 (12.50%) Spring
5 3 (9.38%) CSS
5 3 (9.38%) Guice
5 3 (9.38%) Jest
5 3 (9.38%) JMS
5 3 (9.38%) Node.js
6 2 (6.25%) Akka
6 2 (6.25%) RabbitMQ
6 2 (6.25%) Redux
6 2 (6.25%) Spark Streaming
7 1 (3.13%) AVFoundation
7 1 (3.13%) GraphQL
7 1 (3.13%) React Native
Miscellaneous
1 6 (18.75%) Public Cloud
2 4 (12.50%) Analytical Skills
3 3 (9.38%) Video on Demand
4 2 (6.25%) Over-the-Top Content
4 2 (6.25%) User Experience
4 2 (6.25%) Video\Live Streaming
5 1 (3.13%) Apple TV
5 1 (3.13%) Cyber Defence
5 1 (3.13%) Data Centre
5 1 (3.13%) iPad
5 1 (3.13%) iPhone
Operating Systems
1 6 (18.75%) Linux
2 5 (15.63%) Unix
3 2 (6.25%) Android
4 1 (3.13%) Android TV
4 1 (3.13%) Apple iOS
4 1 (3.13%) tvOS
4 1 (3.13%) Windows
Processes & Methodologies
1 26 (81.25%) Agile Software Development
2 16 (50.00%) Pair Programming
3 12 (37.50%) Microservices
4 11 (34.38%) Test Automation
5 10 (31.25%) Continuous Integration
5 10 (31.25%) Scrum
5 10 (31.25%) Software Engineering
6 9 (28.13%) Unit Testing
7 8 (25.00%) Acceptance Criteria
7 8 (25.00%) BDD
8 7 (21.88%) DevOps
9 6 (18.75%) Defensive Programming
9 6 (18.75%) Open Source
10 5 (15.63%) Continuous Deployment
10 5 (15.63%) Continuous Improvement
10 5 (15.63%) Root Cause Analysis
11 4 (12.50%) User Stories
12 3 (9.38%) Continuous Delivery
13 2 (6.25%) MVC
13 2 (6.25%) MVVM
Programming Languages
1 17 (53.13%) Java
2 9 (28.13%) Python
3 5 (15.63%) JavaScript
4 4 (12.50%) C++
4 4 (12.50%) Java 8
4 4 (12.50%) Scala
5 2 (6.25%) Bash Shell
5 2 (6.25%) SQL
6 1 (3.13%) Apple Swift
6 1 (3.13%) ES6
6 1 (3.13%) Kotlin
6 1 (3.13%) R
Qualifications
1 5 (15.63%) Degree
2 3 (9.38%) SC Cleared
2 3 (9.38%) Security Cleared
3 1 (3.13%) Computer Science Degree
Quality Assurance & Compliance
1 8 (25.00%) QA
System Software
1 8 (25.00%) Docker
2 1 (3.13%) Apache Flume
Systems Management
1 3 (9.38%) Kubernetes
2 2 (6.25%) Ansible
2 2 (6.25%) Grafana
2 2 (6.25%) Prometheus
2 2 (6.25%) Terraform
3 1 (3.13%) Hadoop YARN
3 1 (3.13%) Kibana
3 1 (3.13%) Rancher
Vendors
1 2 (6.25%) Cloudera
1 2 (6.25%) Microsoft
2 1 (3.13%) Apple
2 1 (3.13%) Informatica
2 1 (3.13%) Tableau
2 1 (3.13%) Teradata
2 1 (3.13%) VMware