Period
to 16 February 2019

The following table provides summary statistics for contract job vacancies advertised in Twickenham 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 16 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)
6 months to
16 Feb 2019
Same period 2018 Same period 2017
Rank 8 11 8
Rank change year-on-year +3 -3 -2
Contract jobs citing TDD 6 1 1
As % of all contract IT jobs advertised in Twickenham 11.11% 2.33% 3.57%
As % of the Processes & Methodologies category 12.50% 3.13% 4.55%
Number of daily rates quoted 5 1 1
Twickenham median daily rate £475 £400 £350
Median daily rate % change year-on-year +18.75% +14.29% -12.50%
10th Percentile £356 £400 £325
90th Percentile £488 £400 £375
Richmond upon Thames median daily rate £475 £425 £275
% change year-on-year +11.76% +54.55% -31.25%
Number of hourly rates quoted 0 0 0
Twickenham median hourly rate - - -
Richmond upon Thames 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 Twickenham with a requirement for process or methodology skills.

All Process and Methodology Skills
Twickenham
Contract vacancies with a requirement for process or methodology skills 48 32 22
As % of all contract IT jobs advertised in Twickenham 88.89% 74.42% 78.57%
Number of daily rates quoted 36 26 19
Twickenham median daily rate £413 £375 £330
Median daily rate % change year-on-year +10.00% +13.64% -14.84%
10th Percentile £218 £209 £201
90th Percentile £538 £461 £440
Richmond upon Thames median daily rate £475 £388 £325
% change year-on-year +22.58% +19.23% -13.33%
Number of hourly rates quoted 3 1 0
Twickenham median hourly rate £52.50 £11.78 -
Median hourly rate % change year-on-year +345.67% - -
Richmond upon Thames median hourly rate £52.50 £22.50 -
% change year-on-year +133.33% - -

TDD
Job Vacancy Trend in Twickenham

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

Job vacancy trend for TDD in Twickenham

TDD
Contractor Daily Rate Trend in Twickenham

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

Contractor daily rate trend for TDD in Twickenham

TDD
Contractor Daily Rate Histogram in Twickenham

The daily rate distribution of IT jobs citing TDD in Twickenham over the 6 months to 16 February 2019.

Contractor daily rate histogram for TDD in Twickenham

For the 6 months to 16 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 Twickenham region with a requirement for TDD.

1 5 (83.33%) Agile Software Development
2 4 (66.67%) Java
2 4 (66.67%) BDD
2 4 (66.67%) REST
3 3 (50.00%) Continuous Integration
3 3 (50.00%) Spring
4 2 (33.33%) JSON
4 2 (33.33%) Git (software)
4 2 (33.33%) Test Automation
4 2 (33.33%) Hadoop
4 2 (33.33%) Shell Script
4 2 (33.33%) Middleware
4 2 (33.33%) Benchmarking
4 2 (33.33%) Unix
4 2 (33.33%) Linux
4 2 (33.33%) Apache
4 2 (33.33%) RabbitMQ
4 2 (33.33%) HBase
4 2 (33.33%) Apache ZooKeeper
4 2 (33.33%) ATDD
4 2 (33.33%) Kafka
4 2 (33.33%) GitHub
4 2 (33.33%) Gradle
4 2 (33.33%) Apache Avro
4 2 (33.33%) Jenkins
4 2 (33.33%) HDFS
4 2 (33.33%) DevOps
4 2 (33.33%) Microservices
4 2 (33.33%) Hadoop YARN
4 2 (33.33%) Continuous Delivery

TDD
Co-occurring IT Skills in Twickenham 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 2 (33.33%) Apache
Cloud Services
1 2 (33.33%) GitHub
2 1 (16.67%) Amazon AWS
2 1 (16.67%) AWS Lambda
2 1 (16.67%) Microsoft Azure
2 1 (16.67%) Serverless
Database & Business Intelligence
1 2 (33.33%) Hadoop
1 2 (33.33%) HBase
1 2 (33.33%) Parquet
2 1 (16.67%) Relational Database
Development Applications
1 2 (33.33%) Git (software)
1 2 (33.33%) Gradle
1 2 (33.33%) Jenkins
2 1 (16.67%) Cucumber
2 1 (16.67%) JBehave
2 1 (16.67%) JUnit
2 1 (16.67%) Mockito
2 1 (16.67%) Visual Studio Team System
Job Titles
1 5 (83.33%) Developer
2 3 (50.00%) Java Developer
3 1 (16.67%) Full Stack Developer
3 1 (16.67%) JavaScript Developer
3 1 (16.67%) Test Automation Engineer
3 1 (16.67%) Test Engineer
Libraries, Frameworks & Software Standards
1 4 (66.67%) REST
2 3 (50.00%) Spring
3 2 (33.33%) Apache Avro
3 2 (33.33%) JSON
3 2 (33.33%) Kafka
3 2 (33.33%) Middleware
3 2 (33.33%) RabbitMQ
4 1 (16.67%) .NET
4 1 (16.67%) AngularJS
4 1 (16.67%) Hibernate
4 1 (16.67%) iBATIS
4 1 (16.67%) J2EE
4 1 (16.67%) JMS
4 1 (16.67%) JPA
4 1 (16.67%) jQuery
4 1 (16.67%) Node.js
4 1 (16.67%) React
4 1 (16.67%) Spring Boot
4 1 (16.67%) Spring MVC
Miscellaneous
1 2 (33.33%) Linux Command Line
1 2 (33.33%) Virtual Team
2 1 (16.67%) User Experience
Operating Systems
1 2 (33.33%) Linux
1 2 (33.33%) Unix
Processes & Methodologies
1 5 (83.33%) Agile Software Development
2 4 (66.67%) BDD
3 3 (50.00%) Continuous Integration
4 2 (33.33%) ATDD
4 2 (33.33%) Benchmarking
4 2 (33.33%) Continuous Delivery
4 2 (33.33%) DevOps
4 2 (33.33%) Microservices
4 2 (33.33%) Test Automation
5 1 (16.67%) Agile Coaching
5 1 (16.67%) Event-Driven Architecture
5 1 (16.67%) High Availability
5 1 (16.67%) Kanban
5 1 (16.67%) Low Latency
5 1 (16.67%) MVC
5 1 (16.67%) Scrum
5 1 (16.67%) Software Testing
Programming Languages
1 4 (66.67%) Java
2 2 (33.33%) Shell Script
3 1 (16.67%) C#
3 1 (16.67%) ES6
3 1 (16.67%) Java 8
3 1 (16.67%) JavaScript
3 1 (16.67%) TypeScript
Quality Assurance & Compliance
1 1 (16.67%) QA
System Software
1 2 (33.33%) Apache ZooKeeper
1 2 (33.33%) HDFS
Systems Management
1 2 (33.33%) Hadoop YARN