Period
to 19 September 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 19 September 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
19 Sep 2018
Same period 2017 Same period 2016
Rank 16 8 26
Rank change year-on-year -8 +18 +7
Contract jobs citing TDD 165 119 42
As % of all contract IT jobs advertised in Croydon 13.72% 20.99% 8.12%
As % of the Processes & Methodologies category 15.38% 22.50% 8.86%
Number of daily rates quoted 110 75 35
Croydon median daily rate £525 £525 £450
Median daily rate % change year-on-year - +16.67% -
10th Percentile £456 £422 £381
90th Percentile £588 £633 £586
South London median daily rate £525 £525 £425
% change year-on-year - +23.53% +6.25%
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 1,073 529 474
As % of all contract IT jobs advertised in Croydon 89.19% 93.30% 91.68%
Number of daily rates quoted 758 317 307
Croydon median daily rate £525 £488 £413
Median daily rate % change year-on-year +7.69% +18.18% -1.20%
10th Percentile £363 £313 £300
90th Percentile £650 £639 £553
South London median daily rate £500 £475 £425
% change year-on-year +5.26% +11.76% +13.33%
Number of hourly rates quoted 2 3 9
Croydon median hourly rate £27.00 £13.50 £22.00
Median hourly rate % change year-on-year +100.00% -38.64% -20.81%
10th Percentile £20.15 £12.80 £14.70
90th Percentile £33.45 £25.65 £95.00
South London median hourly rate £43.63 £47.50 £20.50
% change year-on-year -8.16% +131.71% -57.14%

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 19 September 2018.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 19 September 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.

1 145 (87.88%) Agile Software Development
2 127 (76.97%) Java
3 85 (51.52%) Scrum
4 81 (49.09%) Jenkins
5 79 (47.88%) Continuous Integration
6 78 (47.27%) PostgreSQL
6 78 (47.27%) Amazon AWS
7 77 (46.67%) Git (software)
8 76 (46.06%) OO
9 63 (38.18%) Security Cleared
10 62 (37.58%) Web Services
11 59 (35.76%) SC Cleared
12 58 (35.15%) BDD
13 48 (29.09%) Tomcat
14 47 (28.48%) Maven
14 47 (28.48%) Ansible
15 45 (27.27%) Spring
15 45 (27.27%) Kanban
16 44 (26.67%) RESTful
17 42 (25.45%) NoSQL
18 40 (24.24%) Apache Camel
19 38 (23.03%) Puppet
19 38 (23.03%) J2EE
19 38 (23.03%) JUnit
19 38 (23.03%) WebLogic
20 37 (22.42%) MySQL
20 37 (22.42%) Oracle
20 37 (22.42%) Microsoft Azure
20 37 (22.42%) Mockito
20 37 (22.42%) Opscode Chef

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 48 (29.09%) Tomcat
2 38 (23.03%) WebLogic
3 36 (21.82%) OpenStack
3 36 (21.82%) WebSphere
4 30 (18.18%) Confluence
5 14 (8.48%) Apache Spark
6 10 (6.06%) Apache Solr
7 8 (4.85%) Elasticsearch
8 3 (1.82%) Apache
9 2 (1.21%) JBoss
10 1 (0.61%) Apache ServiceMix
10 1 (0.61%) Jetty
10 1 (0.61%) Oracle Self-Service HR
Applications
1 17 (10.30%) Photoshop
2 1 (0.61%) Microsoft Excel
Cloud Services
1 78 (47.27%) Amazon AWS
2 37 (22.42%) Microsoft Azure
3 36 (21.82%) GitHub
4 28 (16.97%) Amazon EC2
5 3 (1.82%) npm
6 1 (0.61%) Amazon S3
6 1 (0.61%) IaaS
6 1 (0.61%) PaaS
6 1 (0.61%) Trello
Communications & Networking
1 9 (5.45%) Kerberos
2 1 (0.61%) Skype
2 1 (0.61%) SSH
Database & Business Intelligence
1 78 (47.27%) PostgreSQL
2 42 (25.45%) NoSQL
3 37 (22.42%) MySQL
4 17 (10.30%) Big Data
4 17 (10.30%) HBase
5 10 (6.06%) Hadoop
6 4 (2.42%) Data Warehouse
7 2 (1.21%) Amazon Redshift
7 2 (1.21%) MongoDB
7 2 (1.21%) Redis
8 1 (0.61%) Oracle Database
8 1 (0.61%) Relational Database
Development Applications
1 81 (49.09%) Jenkins
2 77 (46.67%) Git (software)
3 47 (28.48%) Maven
4 38 (23.03%) JUnit
5 37 (22.42%) Mockito
6 36 (21.82%) GitLab
6 36 (21.82%) MSTest
6 36 (21.82%) NUnit
7 35 (21.21%) DbUnit
7 35 (21.21%) jMock
7 35 (21.21%) SonarQube
8 31 (18.79%) JIRA
9 27 (16.36%) Grunt
10 24 (14.55%) Jasmine
10 24 (14.55%) Karma Test Runner
11 10 (6.06%) Cucumber
11 10 (6.06%) IntelliJ
12 3 (1.82%) Gradle
12 3 (1.82%) gulp
12 3 (1.82%) webpack
General
1 5 (3.03%) Retail
2 2 (1.21%) Games
3 1 (0.61%) Electronics
3 1 (0.61%) Finance
3 1 (0.61%) Manufacturing
3 1 (0.61%) Marketing
3 1 (0.61%) Telecoms
Job Titles
1 147 (89.09%) Developer
2 95 (57.58%) Java Developer
3 27 (16.36%) Front End Developer (Client-Side Developer)
4 16 (9.70%) Node.js Developer
4 16 (9.70%) UI Developer
5 10 (6.06%) SC Cleared Java Developer
6 8 (4.85%) Scrum Master
7 7 (4.24%) Senior Developer
8 6 (3.64%) J2EE Developer
8 6 (3.64%) Java/J2EE Developer
9 5 (3.03%) Big Data Developer
9 5 (3.03%) BPM Developer
10 4 (2.42%) Agile Scrum Master
10 4 (2.42%) Junior
10 4 (2.42%) Junior Developer
10 4 (2.42%) Junior Front End Developer (Client-Side Developer)
11 3 (1.82%) Scala Developer
11 3 (1.82%) Senior Front-End Developer
11 3 (1.82%) Senior Java Developer
12 2 (1.21%) Angular Developer
Libraries, Frameworks & Software Standards
1 62 (37.58%) Web Services
2 45 (27.27%) Spring
3 44 (26.67%) RESTful
4 40 (24.24%) Apache Camel
5 38 (23.03%) J2EE
6 35 (21.21%) PowerMock
6 35 (21.21%) SOAP
7 34 (20.61%) Spring Boot
8 32 (19.39%) HTML
9 31 (18.79%) CSS
10 29 (17.58%) HTML5
11 28 (16.97%) AngularJS
11 28 (16.97%) CSS3
11 28 (16.97%) REST
12 25 (15.15%) JSON
13 20 (12.12%) Kafka
14 18 (10.91%) JMS
15 17 (10.30%) Node.js
16 16 (9.70%) JSF
17 14 (8.48%) XML
Miscellaneous
1 15 (9.09%) User Experience
2 8 (4.85%) Algorithms
3 5 (3.03%) Greenfield Project
3 5 (3.03%) NHS
4 1 (0.61%) Cloud Native
4 1 (0.61%) Derivative
4 1 (0.61%) PKI
Operating Systems
1 12 (7.27%) Linux
2 1 (0.61%) Android
2 1 (0.61%) Apple iOS
2 1 (0.61%) CentOS
2 1 (0.61%) Debian
2 1 (0.61%) Mac OS X
2 1 (0.61%) Red Hat Enterprise Linux
2 1 (0.61%) Ubuntu
2 1 (0.61%) Windows
Processes & Methodologies
1 145 (87.88%) Agile Software Development
2 85 (51.52%) Scrum
3 79 (47.88%) Continuous Integration
4 76 (46.06%) OO
5 58 (35.15%) BDD
6 45 (27.27%) Kanban
7 35 (21.21%) E-Commerce
8 32 (19.39%) Test Automation
9 29 (17.58%) Microservices
10 25 (15.15%) Virtual Infrastructure
11 23 (13.94%) Web Development
12 20 (12.12%) Continuous Deployment
13 19 (11.52%) Mentoring
13 19 (11.52%) MVC
14 18 (10.91%) MVVM
14 18 (10.91%) Responsive Web Design
15 17 (10.30%) Problem-Solving
16 16 (9.70%) CQRS
16 16 (9.70%) Domain-Driven Design
16 16 (9.70%) Front End Development
Programming Languages
1 127 (76.97%) Java
2 36 (21.82%) JavaScript
3 28 (16.97%) Java 8
4 7 (4.24%) SQL
5 5 (3.03%) Groovy
5 5 (3.03%) Scala
6 1 (0.61%) Bash Shell
6 1 (0.61%) C++
6 1 (0.61%) Clojure
6 1 (0.61%) ClojureScript
6 1 (0.61%) Gremlin
6 1 (0.61%) Perl
6 1 (0.61%) PHP
6 1 (0.61%) PL/SQL
6 1 (0.61%) Python
6 1 (0.61%) Ruby
6 1 (0.61%) T-SQL
6 1 (0.61%) VBA
Qualifications
1 63 (38.18%) Security Cleared
2 59 (35.76%) SC Cleared
3 3 (1.82%) DV Cleared
4 2 (1.21%) CTC Cleared
5 1 (0.61%) DBS Check
Quality Assurance & Compliance
1 4 (2.42%) PMO
2 1 (0.61%) GDPR
2 1 (0.61%) QA
System Software
1 28 (16.97%) vSphere
2 26 (15.76%) VMware Infrastructure
3 20 (12.12%) Docker
4 7 (4.24%) HDFS
Systems Management
1 47 (28.48%) Ansible
2 38 (23.03%) Puppet
3 37 (22.42%) Opscode Chef
4 14 (8.48%) Kubernetes
5 11 (6.67%) Terraform
6 1 (0.61%) Salt
Vendors
1 37 (22.42%) Oracle
2 28 (16.97%) VMware
3 17 (10.30%) Adobe
4 1 (0.61%) Cloudera
4 1 (0.61%) Hortonworks
4 1 (0.61%) Microsoft
4 1 (0.61%) Red Hat
4 1 (0.61%) SAP
4 1 (0.61%) Sybase