Period
to 21 November 2018

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 21 November 2018 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
21 Nov 2018
Same period 2017 Same period 2016
Rank 9 10 -
Rank change year-on-year +1 - +5
Contract jobs citing TDD 5 2 0
As % of all contract IT jobs advertised in Twickenham 11.11% 5.88% -
As % of the Processes & Methodologies category 12.20% 6.90% -
Number of daily rates quoted 5 2 0
Twickenham median daily rate £475 £345 -
Median daily rate % change year-on-year +37.68% - -
Richmond upon Thames median daily rate £490 £413 £325
% change year-on-year +18.79% +26.92% -27.78%
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 41 29 32
As % of all contract IT jobs advertised in Twickenham 91.11% 85.29% 76.19%
Number of daily rates quoted 29 22 25
Twickenham median daily rate £420 £375 £425
Median daily rate % change year-on-year +12.00% -11.76% +13.33%
10th Percentile £282 £230 £295
90th Percentile £538 £425 £528
Richmond upon Thames median daily rate £475 £400 £381
% change year-on-year +18.75% +4.92% +5.17%
Number of hourly rates quoted 2 2 3
Twickenham median hourly rate £16.15 £33.25 £22.00
Median hourly rate % change year-on-year -51.44% +51.14% -
10th Percentile £11.71 £21.73 £20.80
90th Percentile £20.30 £45.78 £23.00
Richmond upon Thames median hourly rate £16.15 £20.75 £22.00
% change year-on-year -22.18% -5.68% -

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

For the 6 months to 21 November 2018, 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 (100.00%) Agile Software Development
2 4 (80.00%) Git (software)
2 4 (80.00%) Java
3 3 (60.00%) .NET
3 3 (60.00%) C#
3 3 (60.00%) REST
3 3 (60.00%) BDD
3 3 (60.00%) AngularJS
3 3 (60.00%) TypeScript
4 2 (40.00%) Continuous Delivery
4 2 (40.00%) Parquet
4 2 (40.00%) Virtual Team
4 2 (40.00%) Linux Command Line
4 2 (40.00%) .NET Core
4 2 (40.00%) Octopus Deploy
4 2 (40.00%) HDFS
4 2 (40.00%) Hadoop YARN
4 2 (40.00%) Gradle
4 2 (40.00%) Apache Avro
4 2 (40.00%) Jenkins
4 2 (40.00%) NoSQL
4 2 (40.00%) RabbitMQ
4 2 (40.00%) Kafka
4 2 (40.00%) GitHub
4 2 (40.00%) HBase
4 2 (40.00%) Apache ZooKeeper
4 2 (40.00%) Amazon AWS
4 2 (40.00%) Hadoop
4 2 (40.00%) Unix
4 2 (40.00%) Linux

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 (40.00%) Apache
Cloud Services
1 2 (40.00%) Amazon AWS
1 2 (40.00%) GitHub
2 1 (20.00%) Microsoft Azure
Database & Business Intelligence
1 2 (40.00%) Hadoop
1 2 (40.00%) HBase
1 2 (40.00%) NoSQL
1 2 (40.00%) Parquet
Development Applications
1 4 (80.00%) Git (software)
2 2 (40.00%) Gradle
2 2 (40.00%) Jenkins
2 2 (40.00%) Octopus Deploy
3 1 (20.00%) Visual Studio Team System
Job Titles
1 5 (100.00%) Developer
2 4 (80.00%) Java Developer
3 3 (60.00%) Full Stack Developer
4 2 (40.00%) .NET Developer
Libraries, Frameworks & Software Standards
1 3 (60.00%) .NET
1 3 (60.00%) AngularJS
1 3 (60.00%) REST
2 2 (40.00%) .NET Core
2 2 (40.00%) Apache Avro
2 2 (40.00%) JSON
2 2 (40.00%) Kafka
2 2 (40.00%) Middleware
2 2 (40.00%) RabbitMQ
2 2 (40.00%) Spring
Miscellaneous
1 2 (40.00%) Linux Command Line
1 2 (40.00%) Virtual Team
Operating Systems
1 2 (40.00%) Linux
1 2 (40.00%) Unix
Processes & Methodologies
1 5 (100.00%) Agile Software Development
2 3 (60.00%) BDD
3 2 (40.00%) Benchmarking
3 2 (40.00%) Continuous Delivery
3 2 (40.00%) Continuous Integration
3 2 (40.00%) Scrum
4 1 (20.00%) ATDD
4 1 (20.00%) DevOps
4 1 (20.00%) Microservices
4 1 (20.00%) Test Automation
Programming Languages
1 4 (80.00%) Java
2 3 (60.00%) C#
2 3 (60.00%) TypeScript
3 2 (40.00%) JavaScript
3 2 (40.00%) Shell Script
3 2 (40.00%) SQL
System Software
1 2 (40.00%) Apache ZooKeeper
1 2 (40.00%) HDFS
Systems Management
1 2 (40.00%) Hadoop YARN