Period
to 23 June 2018

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 6 months to 23 June 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)
South London > Croydon
6 months to
23 Jun 2018
Same period 2017 Same period 2016
Rank 14 8 18
Rank change year-on-year -6 +10 +14
Contract jobs citing TDD 131 57 46
As % of all contract IT jobs advertised in Croydon 12.07% 15.16% 8.86%
As % of the Processes & Methodologies category 13.55% 16.86% 9.83%
Number of daily rates quoted 81 35 39
Croydon median daily rate £475 £525 £438
Median daily rate % change year-on-year -9.52% +20.00% +25.00%
10th Percentile £406 £425 £373
90th Percentile £588 £575 £579
South London median daily rate £475 £488 £425
% change year-on-year -2.56% +14.71% +19.30%
Number of hourly rates quoted 0 0 0
Croydon median hourly rate - - -
South 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 Croydon with a requirement for process or methodology skills.

All Process and Methodology Skills
Croydon
Contract vacancies with a requirement for process or methodology skills 967 338 468
As % of all contract IT jobs advertised in Croydon 89.12% 89.89% 90.17%
Number of daily rates quoted 648 194 366
Croydon median daily rate £500 £450 £425
Median daily rate % change year-on-year +11.11% +5.88% +10.75%
10th Percentile £363 £285 £300
90th Percentile £675 £576 £583
South London median daily rate £500 £450 £433
% change year-on-year +11.11% +3.93% +15.47%
Number of hourly rates quoted 3 0 8
Croydon median hourly rate £35.00 - £21.00
South London median hourly rate £42.88 £47.00 £21.00
% change year-on-year -8.76% +123.81% -38.24%

TDD
Job Vacancy Trend in Croydon

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

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 6 months to 23 June 2018.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 23 June 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 Croydon region with a requirement for TDD.

1 113 (86.26%) Agile Software Development
2 92 (70.23%) Scrum
3 83 (63.36%) Git (software)
4 68 (51.91%) Java
5 64 (48.85%) Security Cleared
6 60 (45.80%) SC Cleared
7 56 (42.75%) Web Services
7 56 (42.75%) PostgreSQL
8 43 (32.82%) JSON
9 41 (31.30%) BDD
10 38 (29.01%) JMS
11 37 (28.24%) HTML
11 37 (28.24%) JavaScript
11 37 (28.24%) Test Automation
12 35 (26.72%) Node.js
12 35 (26.72%) OO
13 34 (25.95%) JSF
13 34 (25.95%) CQRS
13 34 (25.95%) Domain-Driven Design
13 34 (25.95%) HTML5
14 33 (25.19%) AngularJS
15 32 (24.43%) JIRA
15 32 (24.43%) CSS
16 31 (23.66%) CSS3
16 31 (23.66%) Confluence
17 30 (22.90%) Jenkins
17 30 (22.90%) Continuous Integration
17 30 (22.90%) Maven
18 29 (22.14%) Grunt
19 27 (20.61%) Kanban

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 31 (23.66%) Confluence
2 15 (11.45%) Tomcat
3 14 (10.69%) Apache Spark
4 7 (5.34%) Apache Solr
5 6 (4.58%) Elasticsearch
6 4 (3.05%) Apache
6 4 (3.05%) JBoss
6 4 (3.05%) WebLogic
7 3 (2.29%) Jetty
7 3 (2.29%) Oracle Self-Service HR
8 1 (0.76%) Apache ServiceMix
Applications
1 16 (12.21%) Photoshop
2 3 (2.29%) Microsoft Excel
Cloud Services
1 21 (16.03%) Amazon AWS
2 13 (9.92%) Amazon EC2
3 5 (3.82%) npm
4 3 (2.29%) Microsoft Azure
5 2 (1.53%) Amazon S3
6 1 (0.76%) IaaS
6 1 (0.76%) PaaS
6 1 (0.76%) Trello
Communications & Networking
1 7 (5.34%) Kerberos
2 3 (2.29%) SSH
3 2 (1.53%) HTTP
Database & Business Intelligence
1 56 (42.75%) PostgreSQL
2 16 (12.21%) Big Data
3 15 (11.45%) HBase
4 12 (9.16%) Hadoop
5 5 (3.82%) MongoDB
6 4 (3.05%) Relational Database
7 3 (2.29%) MySQL
7 3 (2.29%) NoSQL
7 3 (2.29%) Oracle Database
8 2 (1.53%) Data Warehouse
8 2 (1.53%) Neo4j
9 1 (0.76%) Amazon Redshift
Development Applications
1 83 (63.36%) Git (software)
2 32 (24.43%) JIRA
3 30 (22.90%) Jenkins
3 30 (22.90%) Maven
4 29 (22.14%) Grunt
5 24 (18.32%) Jasmine
6 23 (17.56%) Karma Test Runner
7 20 (15.27%) JUnit
8 19 (14.50%) Mockito
9 17 (12.98%) DbUnit
9 17 (12.98%) jMock
9 17 (12.98%) SonarQube
10 12 (9.16%) Cucumber
11 10 (7.63%) IntelliJ
12 7 (5.34%) Babel
12 7 (5.34%) webpack
13 6 (4.58%) gulp
13 6 (4.58%) Subversion
14 3 (2.29%) Atlassian Bamboo
14 3 (2.29%) Selenium
General
1 3 (2.29%) Finance
2 2 (1.53%) Retail
3 1 (0.76%) Electronics
3 1 (0.76%) Games
3 1 (0.76%) Manufacturing
3 1 (0.76%) Marketing
3 1 (0.76%) Telecoms
Job Titles
1 110 (83.97%) Developer
2 38 (29.01%) Java Developer
3 31 (23.66%) Front End Developer (Client-Side Developer)
3 31 (23.66%) Node.js Developer
4 16 (12.21%) UI Developer
5 13 (9.92%) Scrum Master
6 11 (8.40%) SC Cleared Java Developer
7 9 (6.87%) Senior Developer
8 7 (5.34%) BPM Developer
9 6 (4.58%) JavaScript Developer
10 5 (3.82%) Big Data Developer
10 5 (3.82%) React Developer
11 4 (3.05%) Agile Developer
11 4 (3.05%) Agile Java Developer
11 4 (3.05%) Junior
11 4 (3.05%) Junior Developer
11 4 (3.05%) Junior Front End Developer (Client-Side Developer)
11 4 (3.05%) Senior Front-End Developer
11 4 (3.05%) Senior Java Developer
12 3 (2.29%) Architect
Libraries, Frameworks & Software Standards
1 56 (42.75%) Web Services
2 43 (32.82%) JSON
3 38 (29.01%) JMS
4 37 (28.24%) HTML
5 35 (26.72%) Node.js
6 34 (25.95%) HTML5
6 34 (25.95%) JSF
7 33 (25.19%) AngularJS
8 32 (24.43%) CSS
9 31 (23.66%) CSS3
10 25 (19.08%) REST
11 24 (18.32%) Apache Camel
11 24 (18.32%) Spring
12 19 (14.50%) J2EE
13 18 (13.74%) RESTful
14 17 (12.98%) Kafka
14 17 (12.98%) PowerMock
14 17 (12.98%) SOAP
14 17 (12.98%) XML
15 13 (9.92%) React
Miscellaneous
1 17 (12.98%) User Experience
2 7 (5.34%) Algorithms
3 3 (2.29%) Derivative
4 2 (1.53%) NHS
4 2 (1.53%) Virtual Team
5 1 (0.76%) Cloud Native
5 1 (0.76%) Greenfield Project
Operating Systems
1 15 (11.45%) Linux
2 6 (4.58%) Mac OS X
3 5 (3.82%) Red Hat Enterprise Linux
3 5 (3.82%) Unix
4 3 (2.29%) Android
4 3 (2.29%) Apple iOS
4 3 (2.29%) CentOS
4 3 (2.29%) Debian
4 3 (2.29%) Ubuntu
4 3 (2.29%) Windows
Processes & Methodologies
1 113 (86.26%) Agile Software Development
2 92 (70.23%) Scrum
3 41 (31.30%) BDD
4 37 (28.24%) Test Automation
5 35 (26.72%) OO
6 34 (25.95%) CQRS
6 34 (25.95%) Domain-Driven Design
7 30 (22.90%) Continuous Integration
8 27 (20.61%) Kanban
9 25 (19.08%) Web Development
10 23 (17.56%) Continuous Deployment
11 22 (16.79%) Microservices
12 20 (15.27%) Front End Development
12 20 (15.27%) Problem-Solving
12 20 (15.27%) Responsive Web Design
13 19 (14.50%) E-Commerce
14 18 (13.74%) DevOps
15 17 (12.98%) MVC
15 17 (12.98%) MVVM
16 16 (12.21%) Mentoring
Programming Languages
1 68 (51.91%) Java
2 37 (28.24%) JavaScript
3 19 (14.50%) Java 8
4 7 (5.34%) Groovy
4 7 (5.34%) SQL
5 5 (3.82%) C++
5 5 (3.82%) Perl
5 5 (3.82%) Python
5 5 (3.82%) Ruby
6 4 (3.05%) Scala
7 3 (2.29%) Bash Shell
7 3 (2.29%) C
7 3 (2.29%) Clojure
7 3 (2.29%) ClojureScript
7 3 (2.29%) PHP
7 3 (2.29%) PL/SQL
7 3 (2.29%) T-SQL
7 3 (2.29%) VBA
8 2 (1.53%) ES6
Qualifications
1 64 (48.85%) Security Cleared
2 60 (45.80%) SC Cleared
3 5 (3.82%) DV Cleared
4 3 (2.29%) CTC Cleared
5 1 (0.76%) DBS Check
Quality Assurance & Compliance
1 2 (1.53%) PMO
2 1 (0.76%) GDPR
System Software
1 14 (10.69%) Docker
2 13 (9.92%) VMware Infrastructure
2 13 (9.92%) vSphere
3 7 (5.34%) HDFS
Systems Management
1 10 (7.63%) Ansible
2 9 (6.87%) Kubernetes
3 8 (6.11%) Terraform
4 6 (4.58%) Puppet
5 3 (2.29%) Opscode Chef
5 3 (2.29%) Salt
Vendors
1 16 (12.21%) Adobe
2 13 (9.92%) VMware
3 3 (2.29%) Cloudera
3 3 (2.29%) Hortonworks
3 3 (2.29%) Microsoft
3 3 (2.29%) Oracle
3 3 (2.29%) Red Hat
3 3 (2.29%) Sybase
4 1 (0.76%) SAP