Period
to 23 February 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 February 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 Feb 2018
Same period 2017 Same period 2016
Rank 29 39 13
Rank change year-on-year +10 -26 +20
Contract jobs citing TDD 83 26 42
As % of all contract IT jobs advertised in Croydon 7.88% 5.52% 9.48%
As % of the Processes & Methodologies category 8.50% 6.18% 10.74%
Number of daily rates quoted 59 24 30
Croydon median daily rate £475 £469 £408
Median daily rate % change year-on-year +1.33% +15.03% -6.86%
10th Percentile £383 £416 £363
90th Percentile £597 £594 £475
South London median daily rate £525 £501 £401
% change year-on-year +4.90% +24.74% +0.31%
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 977 421 391
As % of all contract IT jobs advertised in Croydon 92.78% 89.38% 88.26%
Number of daily rates quoted 688 253 307
Croydon median daily rate £500 £450 £425
Median daily rate % change year-on-year +11.11% +5.88% -
10th Percentile £356 £300 £302
90th Percentile £670 £594 £575
South London median daily rate £500 £438 £400
% change year-on-year +14.29% +9.38% -
Number of hourly rates quoted 0 1 4
Croydon median hourly rate - £43.50 £15.75
Median hourly rate % change year-on-year - +176.19% +5.00%
South London median hourly rate £47.50 £42.75 £24.25
% change year-on-year +11.11% +76.29% +53.77%

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 February 2018.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 23 February 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 76 (91.57%) Agile Software Development
2 54 (65.06%) Java
3 52 (62.65%) Git (software)
4 49 (59.04%) Scrum
5 47 (56.63%) Security Cleared
6 41 (49.40%) SC Cleared
7 40 (48.19%) Continuous Integration
8 39 (46.99%) Web Services
9 30 (36.14%) BDD
9 30 (36.14%) Apache Camel
10 28 (33.73%) PostgreSQL
11 27 (32.53%) Spring
12 26 (31.33%) Jenkins
13 25 (30.12%) REST
13 25 (30.12%) Microservices
13 25 (30.12%) Kanban
14 24 (28.92%) Maven
15 21 (25.30%) Mockito
15 21 (25.30%) OO
16 20 (24.10%) JUnit
16 20 (24.10%) Test Automation
16 20 (24.10%) DevOps
17 19 (22.89%) HTML
18 18 (21.69%) Linux
18 18 (21.69%) RESTful
18 18 (21.69%) JIRA
19 17 (20.48%) Confluence
19 17 (20.48%) J2EE
19 17 (20.48%) JMS
19 17 (20.48%) CQRS

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 17 (20.48%) Confluence
2 11 (13.25%) Apache
3 9 (10.84%) Tomcat
4 5 (6.02%) Apache Spark
5 4 (4.82%) Apache ServiceMix
5 4 (4.82%) Apache Solr
6 3 (3.61%) Elasticsearch
7 2 (2.41%) JBoss
Business Applications
1 1 (1.20%) Oracle BPM
Cloud Services
1 14 (16.87%) Amazon AWS
2 12 (14.46%) Amazon EC2
3 7 (8.43%) npm
4 3 (3.61%) GitHub
Communications & Networking
1 5 (6.02%) Kerberos
2 2 (2.41%) HTTP
Database & Business Intelligence
1 28 (33.73%) PostgreSQL
2 14 (16.87%) Hadoop
3 13 (15.66%) HBase
4 12 (14.46%) Big Data
5 8 (9.64%) NoSQL
6 6 (7.23%) Relational Database
7 5 (6.02%) MongoDB
8 2 (2.41%) Neo4j
9 1 (1.20%) RDBMS
9 1 (1.20%) SQL Server
Development Applications
1 52 (62.65%) Git (software)
2 26 (31.33%) Jenkins
3 24 (28.92%) Maven
4 21 (25.30%) Mockito
5 20 (24.10%) JUnit
6 18 (21.69%) JIRA
7 16 (19.28%) DbUnit
7 16 (19.28%) jMock
8 14 (16.87%) SonarQube
9 12 (14.46%) gulp
10 11 (13.25%) Grunt
10 11 (13.25%) IntelliJ
11 9 (10.84%) Cucumber
11 9 (10.84%) webpack
12 8 (9.64%) Babel
13 4 (4.82%) Selenium
13 4 (4.82%) Subversion
14 3 (3.61%) Protractor
14 3 (3.61%) Vagrant
15 2 (2.41%) Jasmine
General
1 3 (3.61%) Games
Job Titles
1 65 (78.31%) Developer
2 36 (43.37%) Java Developer
3 11 (13.25%) Front End Developer (Client-Side Developer)
4 10 (12.05%) Node.js Developer
5 9 (10.84%) Scrum Master
6 8 (9.64%) BPM Developer
6 8 (9.64%) SC Cleared Java Developer
7 7 (8.43%) Agile Developer
7 7 (8.43%) Agile Java Developer
8 6 (7.23%) Big Data Developer
9 5 (6.02%) Senior Developer
10 4 (4.82%) Applications Developer
10 4 (4.82%) Architect
11 3 (3.61%) Big Data Architect
11 3 (3.61%) Data Architect
11 3 (3.61%) DevOps Engineer
11 3 (3.61%) Digital Developer
11 3 (3.61%) JavaScript Developer
11 3 (3.61%) React Developer
11 3 (3.61%) Senior Java Developer
Libraries, Frameworks & Software Standards
1 39 (46.99%) Web Services
2 30 (36.14%) Apache Camel
3 27 (32.53%) Spring
4 25 (30.12%) REST
5 19 (22.89%) HTML
6 18 (21.69%) RESTful
7 17 (20.48%) J2EE
7 17 (20.48%) JMS
8 16 (19.28%) PowerMock
8 16 (19.28%) SOAP
8 16 (19.28%) Spring Boot
9 15 (18.07%) CSS
9 15 (18.07%) JSON
9 15 (18.07%) Node.js
10 13 (15.66%) JSF
11 11 (13.25%) CSS3
11 11 (13.25%) HTML5
12 9 (10.84%) React
12 9 (10.84%) Sass
13 8 (9.64%) Redux
Miscellaneous
1 10 (12.05%) Algorithms
2 4 (4.82%) Enterprise Software
3 3 (3.61%) Analytical Skills
4 2 (2.41%) Virtual Team
5 1 (1.20%) User Experience
Operating Systems
1 18 (21.69%) Linux
2 5 (6.02%) Unix
3 3 (3.61%) Mac OS X
3 3 (3.61%) Red Hat Enterprise Linux
4 1 (1.20%) VMS
Processes & Methodologies
1 76 (91.57%) Agile Software Development
2 49 (59.04%) Scrum
3 40 (48.19%) Continuous Integration
4 30 (36.14%) BDD
5 25 (30.12%) Kanban
5 25 (30.12%) Microservices
6 21 (25.30%) OO
7 20 (24.10%) DevOps
7 20 (24.10%) Test Automation
8 17 (20.48%) CQRS
9 16 (19.28%) Domain-Driven Design
10 15 (18.07%) E-Commerce
11 12 (14.46%) Virtual Infrastructure
12 11 (13.25%) Mentoring
13 10 (12.05%) Open Source
14 9 (10.84%) Data Science
14 9 (10.84%) Front End Development
14 9 (10.84%) User Stories
15 7 (8.43%) Coaching
15 7 (8.43%) SDLC
Programming Languages
1 54 (65.06%) Java
2 10 (12.05%) JavaScript
3 4 (4.82%) Ruby
4 3 (3.61%) C
4 3 (3.61%) C++
4 3 (3.61%) Perl
4 3 (3.61%) Python
5 2 (2.41%) Scala
6 1 (1.20%) PL/SQL
6 1 (1.20%) Shell Script
6 1 (1.20%) SQL
Qualifications
1 47 (56.63%) Security Cleared
2 41 (49.40%) SC Cleared
3 2 (2.41%) Degree
4 1 (1.20%) DV Cleared
Quality Assurance & Compliance
1 1 (1.20%) Disclosure Scotland
1 1 (1.20%) QA
System Software
1 12 (14.46%) VMware Infrastructure
1 12 (14.46%) vSphere
2 10 (12.05%) Docker
3 6 (7.23%) HDFS
Systems Management
1 15 (18.07%) Kubernetes
2 6 (7.23%) Ansible
3 4 (4.82%) Puppet
3 4 (4.82%) Terraform
4 2 (2.41%) Opscode Chef
5 1 (1.20%) HP ALM
5 1 (1.20%) HP Quality Center
Vendors
1 14 (16.87%) VMware
2 2 (2.41%) Oracle
3 1 (1.20%) Capita
3 1 (1.20%) HP
3 1 (1.20%) Informatica