Period
to 20 August 2019

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 20 August 2019 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
20 Aug 2019
Same period 2018 Same period 2017
Rank 24 16 7
Rank change year-on-year -8 -9 +21
Contract jobs citing TDD 75 161 104
As % of all contract IT jobs advertised in Croydon 10.74% 13.36% 22.08%
As % of the Processes & Methodologies category 11.72% 14.95% 23.69%
Number of daily rates quoted 61 104 68
Croydon median daily rate £475 £525 £525
Median daily rate % change year-on-year -9.52% - +16.67%
10th Percentile £413 £448 £418
90th Percentile £538 £587 £629
South London median daily rate £475 £525 £525
% change year-on-year -9.52% - +23.53%
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 640 1,077 439
As % of all contract IT jobs advertised in Croydon 91.69% 89.38% 93.21%
Number of daily rates quoted 478 733 250
Croydon median daily rate £500 £515 £498
Median daily rate % change year-on-year -2.91% +3.52% +21.34%
10th Percentile £363 £357 £342
90th Percentile £638 £675 £626
South London median daily rate £475 £500 £475
% change year-on-year -5.00% +5.26% +11.76%
Number of hourly rates quoted 3 3 3
Croydon median hourly rate £35.00 £35.00 £13.50
Median hourly rate % change year-on-year - +159.26% -44.90%
South London median hourly rate £44.13 £42.27 £47.00
% change year-on-year +4.40% -10.07% +129.27%

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 20 August 2019.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 20 August 2019, 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 64 (85.33%) Agile Software Development
2 56 (74.67%) Java
3 49 (65.33%) BDD
4 48 (64.00%) Git (software)
5 45 (60.00%) Maven
6 41 (54.67%) Continuous Integration
7 40 (53.33%) Scrum
8 38 (50.67%) Jenkins
9 37 (49.33%) Web Services
9 37 (49.33%) Security Cleared
10 35 (46.67%) SOAP
11 34 (45.33%) SC Cleared
11 34 (45.33%) Kanban
11 34 (45.33%) Apache Camel
12 31 (41.33%) Spring
12 31 (41.33%) JUnit
13 30 (40.00%) RESTful
13 30 (40.00%) Amazon AWS
14 29 (38.67%) Mockito
14 29 (38.67%) PowerMock
15 28 (37.33%) SonarQube
15 28 (37.33%) jMock
15 28 (37.33%) J2EE
15 28 (37.33%) E-Commerce
16 27 (36.00%) DbUnit
17 26 (34.67%) REST
18 25 (33.33%) Spring Boot
19 23 (30.67%) Amazon EC2
20 21 (28.00%) vSphere
20 21 (28.00%) VMware

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 10 (13.33%) Elasticsearch
2 9 (12.00%) Apache Solr
2 9 (12.00%) Tomcat
3 5 (6.67%) Confluence
4 4 (5.33%) JBoss
5 1 (1.33%) Apache
5 1 (1.33%) Apache Spark
Cloud Services
1 30 (40.00%) Amazon AWS
2 23 (30.67%) Amazon EC2
3 7 (9.33%) npm
4 5 (6.67%) GitHub
5 1 (1.33%) Amazon SQS
Communications & Networking
1 3 (4.00%) OpenLDAP
2 1 (1.33%) HTTP
2 1 (1.33%) Kerberos
Database & Business Intelligence
1 15 (20.00%) PostgreSQL
2 9 (12.00%) HBase
3 7 (9.33%) Hadoop
4 6 (8.00%) Big Data
5 5 (6.67%) SQL Server
6 3 (4.00%) MongoDB
6 3 (4.00%) SQL Server Integration Services
7 1 (1.33%) Amazon RDS
7 1 (1.33%) Amazon Redshift
Development Applications
1 48 (64.00%) Git (software)
2 45 (60.00%) Maven
3 38 (50.67%) Jenkins
4 31 (41.33%) JUnit
5 29 (38.67%) Mockito
6 28 (37.33%) jMock
6 28 (37.33%) SonarQube
7 27 (36.00%) DbUnit
8 10 (13.33%) Cucumber
9 9 (12.00%) Grunt
9 9 (12.00%) gulp
10 7 (9.33%) JIRA
11 5 (6.67%) Selenium
12 3 (4.00%) GitLab
12 3 (4.00%) Hudson
12 3 (4.00%) IntelliJ
12 3 (4.00%) JMeter
12 3 (4.00%) Sonatype Nexus
13 2 (2.67%) Bitbucket
13 2 (2.67%) Gerrit
General
1 10 (13.33%) Public Sector
2 6 (8.00%) Finance
3 4 (5.33%) Retail
4 2 (2.67%) Games
5 1 (1.33%) Electronics
5 1 (1.33%) Manufacturing
5 1 (1.33%) Marketing
5 1 (1.33%) Telecoms
Job Titles
1 58 (77.33%) Developer
2 39 (52.00%) Java Developer
3 9 (12.00%) Front End Developer (Client-Side Developer)
3 9 (12.00%) J2EE Developer
3 9 (12.00%) Java/J2EE Developer
4 8 (10.67%) SC Cleared Java Developer
5 7 (9.33%) Angular Developer
5 7 (9.33%) C# Developer
5 7 (9.33%) JavaScript Developer
6 6 (8.00%) Architect
7 5 (6.67%) .NET Developer
7 5 (6.67%) C# .NET Developer
7 5 (6.67%) Scrum Master
8 4 (5.33%) Cloud Architect
8 4 (5.33%) Senior Developer
8 4 (5.33%) Senior Java Developer
9 3 (4.00%) SSIS Developer
10 2 (2.67%) ASP.NET MVC Developer
10 2 (2.67%) Backend Developer
10 2 (2.67%) Tester
Libraries, Frameworks & Software Standards
1 37 (49.33%) Web Services
2 35 (46.67%) SOAP
3 34 (45.33%) Apache Camel
4 31 (41.33%) Spring
5 30 (40.00%) RESTful
6 29 (38.67%) PowerMock
7 28 (37.33%) J2EE
8 26 (34.67%) REST
9 25 (33.33%) Spring Boot
10 20 (26.67%) AngularJS
10 20 (26.67%) HTML
11 19 (25.33%) CSS
12 12 (16.00%) CSS3
12 12 (16.00%) HTML5
13 9 (12.00%) Node.js
14 8 (10.67%) Hibernate
14 8 (10.67%) RabbitMQ
15 7 (9.33%) .NET
15 7 (9.33%) .NET Core
15 7 (9.33%) Twitter Bootstrap
Miscellaneous
1 8 (10.67%) Greenfield Project
2 4 (5.33%) NHS
3 1 (1.33%) Data Structures
3 1 (1.33%) PKI
3 1 (1.33%) User Experience
Operating Systems
1 9 (12.00%) Linux
2 3 (4.00%) CentOS
2 3 (4.00%) Red Hat Enterprise Linux
Processes & Methodologies
1 64 (85.33%) Agile Software Development
2 49 (65.33%) BDD
3 41 (54.67%) Continuous Integration
4 40 (53.33%) Scrum
5 34 (45.33%) Kanban
6 28 (37.33%) E-Commerce
7 20 (26.67%) Microservices
7 20 (26.67%) Open Source
7 20 (26.67%) Virtual Infrastructure
8 18 (24.00%) DevOps
9 10 (13.33%) Front End Development
9 10 (13.33%) Test Automation
10 9 (12.00%) Web Accessibility
11 8 (10.67%) Architectural Design
11 8 (10.67%) MVC
11 8 (10.67%) Pair Programming
11 8 (10.67%) Responsive Web Design
12 7 (9.33%) BEM - Block Element Modifier
12 7 (9.33%) Unit Testing
13 6 (8.00%) User Stories
Programming Languages
1 56 (74.67%) Java
2 20 (26.67%) JavaScript
3 11 (14.67%) Java 8
4 7 (9.33%) C#
5 4 (5.33%) SQL
6 3 (4.00%) Python
6 3 (4.00%) Ruby
7 2 (2.67%) ES6
8 1 (1.33%) Bash Shell
8 1 (1.33%) Groovy
8 1 (1.33%) PHP
8 1 (1.33%) PHP 5
Qualifications
1 37 (49.33%) Security Cleared
2 34 (45.33%) SC Cleared
3 2 (2.67%) BPSS Clearance
3 2 (2.67%) DBS Check
Quality Assurance & Compliance
1 2 (2.67%) Disclosure Scotland
2 1 (1.33%) QA
2 1 (1.33%) WCAG
System Software
1 21 (28.00%) vSphere
2 20 (26.67%) VMware Infrastructure
3 10 (13.33%) Docker
4 1 (1.33%) Postfix
Systems Management
1 8 (10.67%) Kubernetes
2 3 (4.00%) ZABBIX
3 2 (2.67%) Terraform
4 1 (1.33%) Ansible
Vendors
1 21 (28.00%) VMware
2 6 (8.00%) Google
3 3 (4.00%) Red Hat
4 1 (1.33%) Atlassian
4 1 (1.33%) SAP