The following table provides summary statistics for contract job vacancies advertised in Croydon 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 / Croydon
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 8 15 19
Rank change year-on-year +7 +4  
Contract jobs citing TDD 50 29 8
As % of all contract IT jobs advertised in Croydon 24.63% 11.93% 5.67%
As % of the Processes & Methodologies category 26.74% 13.30% 6.15%
Number of daily rates quoted 26 24 4
Median daily rate £525 £450 £369
Median daily rate % change year-on-year +16.66% +22.03%  
90% offered a daily rate of more than £438 £388 £315
10% offered a daily rate of more than £550 £563 £423
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 Croydon with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Croydon
Contract job vacancies with a requirement for process and methodology skills 187 218 130
As % of all contract IT job vacancies advertised in Croydon 92.12% 89.71% 92.20%
Number of daily rates quoted 97 147 89
Median daily rate £488 £425 £400
Median daily rate % change year-on-year +14.70% +6.25%  
90% offered a daily rate of more than £395 £325 £250
10% offered a daily rate of more than £550 £550 £525
UK excluding London median daily rate £415 £400 £385
% change year-on-year +3.75% +3.89%  
Number of hourly rates quoted 0 6 3
Median hourly rate - £21.00 £27.78
Median hourly rate % change year-on-year - -24.40%  
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 Croydon

The job posting trend of jobs advertised in Croydon 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 Croydon

TDD
Contractor Daily Rate Trend in Croydon

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

Contractor daily rate trend for TDD in Croydon

TDD
Contractor Daily Rate Histogram in Croydon

The daily rate distribution of IT jobs citing TDD in Croydon over the 3 months to 27 June 2017.

Contractor daily rate histogram for TDD in Croydon

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 Croydon region with a requirement for TDD.

1 46 (75.41%) Java
2 44 (72.13%) Agile Software Development
3 41 (67.21%) Scrum
4 36 (59.02%) BDD
5 31 (50.82%) Security Cleared
6 28 (45.90%) Microservices
7 27 (44.26%) SC Cleared
7 27 (44.26%) REST
8 24 (39.34%) JIRA
8 24 (39.34%) Spring
9 23 (37.70%) Confluence
9 23 (37.70%) Cucumber
10 21 (34.43%) JavaScript
11 20 (32.79%) Apache Camel
12 19 (31.15%) HTML
13 18 (29.51%) CSS
13 18 (29.51%) OO
13 18 (29.51%) HBase
13 18 (29.51%) Continuous Integration
13 18 (29.51%) Git (software)
13 18 (29.51%) Test Automation
14 17 (27.87%) GitHub
14 17 (27.87%) AngularJS
15 16 (26.23%) Docker
15 16 (26.23%) Spring Boot
15 16 (26.23%) Web Services
16 15 (24.59%) MVC
16 15 (24.59%) Hadoop
16 15 (24.59%) HTML5
16 15 (24.59%) Kubernetes

TDD
Co-occurring IT Skills in Croydon 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 23 (37.70%) Confluence
2 6 (9.84%) Apache Solr
2 6 (9.84%) Apache Spark
3 4 (6.56%) CMS
3 4 (6.56%) Tomcat
4 2 (3.28%) Apache
4 2 (3.28%) JBoss
5 1 (1.64%) Elasticsearch
Applications
1 11 (18.03%) Photoshop
Business Applications
1 1 (1.64%) SAP Oil and Gas
Cloud Services
1 17 (27.87%) GitHub
2 2 (3.28%) Amazon AWS
2 2 (3.28%) Amazon EC2
3 1 (1.64%) Microsoft Azure
Communications & Networking
1 6 (9.84%) Kerberos
2 2 (3.28%) OpenLDAP
3 1 (1.64%) Firewall
Database & Business Intelligence
1 18 (29.51%) HBase
2 15 (24.59%) Hadoop
3 13 (21.31%) PostgreSQL
4 10 (16.39%) Big Data
5 4 (6.56%) IBM InfoSphere
6 2 (3.28%) Relational Database
7 1 (1.64%) NoSQL
Development Applications
1 24 (39.34%) JIRA
2 23 (37.70%) Cucumber
3 18 (29.51%) Git (software)
4 13 (21.31%) GitLab
4 13 (21.31%) Grunt
5 12 (19.67%) Jasmine
5 12 (19.67%) Karma Test Runner
6 11 (18.03%) IntelliJ
7 8 (13.11%) Jenkins
8 7 (11.48%) JUnit
9 6 (9.84%) DbUnit
9 6 (9.84%) jMock
9 6 (9.84%) Maven
9 6 (9.84%) Mockito
9 6 (9.84%) SonarQube
10 4 (6.56%) RSpec
11 2 (3.28%) Gradle
11 2 (3.28%) JMeter
12 1 (1.64%) Protractor
12 1 (1.64%) webpack
General
1 1 (1.64%) Electronics
1 1 (1.64%) Finance
1 1 (1.64%) Games
1 1 (1.64%) Local Government
1 1 (1.64%) Manufacturing
1 1 (1.64%) Marketing
1 1 (1.64%) Publishing
1 1 (1.64%) Telecoms
Job Titles
1 44 (72.13%) Developer
2 18 (29.51%) Java Developer
3 9 (14.75%) Front End Developer (Client-Side Developer)
3 9 (14.75%) Scrum Master
4 5 (8.20%) Hadoop Developer
4 5 (8.20%) SC Cleared Java Developer
5 4 (6.56%) Data Engineer
5 4 (6.56%) UI Developer
6 3 (4.92%) Developer in Test
6 3 (4.92%) JavaScript Developer
6 3 (4.92%) Software Developer
7 2 (3.28%) Angular Developer
7 2 (3.28%) Big Data Developer
7 2 (3.28%) Big Data Engineer
7 2 (3.28%) BPM Developer
7 2 (3.28%) Hadoop Engineer
7 2 (3.28%) Java Engineer
7 2 (3.28%) PostgreSQL Developer
7 2 (3.28%) Scala Developer
7 2 (3.28%) Senior Developer
Libraries, Frameworks & Software Standards
1 27 (44.26%) REST
2 24 (39.34%) Spring
3 20 (32.79%) Apache Camel
4 19 (31.15%) HTML
5 18 (29.51%) CSS
6 17 (27.87%) AngularJS
7 16 (26.23%) Spring Boot
7 16 (26.23%) Web Services
8 15 (24.59%) HTML5
9 14 (22.95%) CSS3
9 14 (22.95%) RESTful
10 10 (16.39%) Kafka
11 7 (11.48%) SOAP
12 6 (9.84%) Drools
12 6 (9.84%) J2EE
12 6 (9.84%) PowerMock
13 5 (8.20%) XML
14 4 (6.56%) Samza
15 3 (4.92%) Apache CXF
16 2 (3.28%) Spring MVC
Miscellaneous
1 7 (11.48%) Algorithms
2 1 (1.64%) Greenfield Project
Operating Systems
1 11 (18.03%) Linux
Processes & Methodologies
1 44 (72.13%) Agile Software Development
2 41 (67.21%) Scrum
3 36 (59.02%) BDD
4 28 (45.90%) Microservices
5 18 (29.51%) Continuous Integration
5 18 (29.51%) OO
5 18 (29.51%) Test Automation
6 15 (24.59%) MVC
7 13 (21.31%) Kanban
7 13 (21.31%) Web Development
8 12 (19.67%) Front End Development
8 12 (19.67%) MVVM
8 12 (19.67%) Responsive Web Design
9 10 (16.39%) Mentoring
9 10 (16.39%) User Stories
10 8 (13.11%) DevOps
11 7 (11.48%) Pair Programming
12 6 (9.84%) Data Architecture
13 4 (6.56%) E-Commerce
13 4 (6.56%) MapReduce
Programming Languages
1 46 (75.41%) Java
2 21 (34.43%) JavaScript
3 7 (11.48%) Scala
4 3 (4.92%) Ruby
5 2 (3.28%) C#
5 2 (3.28%) Go
5 2 (3.28%) Python
6 1 (1.64%) ES6
6 1 (1.64%) JSX
6 1 (1.64%) SQL
6 1 (1.64%) T-SQL
6 1 (1.64%) VBScript
Qualifications
1 31 (50.82%) Security Cleared
2 27 (44.26%) SC Cleared
3 1 (1.64%) DV Cleared
Quality Assurance & Compliance
1 3 (4.92%) QA
System Software
1 16 (26.23%) Docker
2 6 (9.84%) Apache ZooKeeper
2 6 (9.84%) HDFS
3 2 (3.28%) VMware Infrastructure
3 2 (3.28%) vSphere
Systems Management
1 15 (24.59%) Kubernetes
2 4 (6.56%) Ansible
2 4 (6.56%) Hadoop YARN
2 4 (6.56%) Terraform
Vendors
1 11 (18.03%) Adobe
2 4 (6.56%) IBM
3 2 (3.28%) VMware
4 1 (1.64%) ForgeRock
4 1 (1.64%) Microsoft
4 1 (1.64%) SAP
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