Period
to 27 January 2020

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 27 January 2020 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
27 Jan 2020
Same period 2019 Same period 2018
Rank 23 27 26
Rank change year-on-year +4 -1 +17
Contract jobs citing TDD 59 111 89
As % of all contract IT jobs advertised in Croydon 11.13% 11.16% 8.65%
As % of the Processes & Methodologies category 11.68% 11.68% 9.29%
Number of daily rates quoted 48 91 62
Croydon median daily rate £525 £525 £493
Median daily rate % change year-on-year - +6.60% +6.49%
10th Percentile £422 £463 £383
90th Percentile £621 £588 £585
South London median daily rate £500 £525 £525
% change year-on-year -4.76% - +5.00%
Number of hourly rates quoted 1 1 0
Croydon median hourly rate £35.00 £35.00 -
South London median hourly rate £35.00 £35.00 -

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 505 950 958
As % of all contract IT jobs advertised in Croydon 95.28% 95.48% 93.10%
Number of daily rates quoted 384 722 658
Croydon median daily rate £500 £525 £500
Median daily rate % change year-on-year -4.76% +5.00% +17.65%
10th Percentile £396 £380 £356
90th Percentile £636 £600 £670
South London median daily rate £475 £513 £500
% change year-on-year -7.36% +2.55% +17.65%
Number of hourly rates quoted 3 6 1
Croydon median hourly rate £35.00 £35.00 £13.50
Median hourly rate % change year-on-year - +159.26% -68.97%
South London median hourly rate £47.83 £43.75 £47.83
% change year-on-year +9.33% -8.53% +13.88%

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 27 January 2020.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 27 January 2020, 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 50 (84.75%) Agile Software Development
2 40 (67.80%) Java
3 37 (62.71%) Maven
3 37 (62.71%) Security Cleared
3 37 (62.71%) Git (software)
3 37 (62.71%) AWS
3 37 (62.71%) BDD
4 35 (59.32%) Jenkins
5 33 (55.93%) Scrum
6 31 (52.54%) Continuous Integration
7 29 (49.15%) Spring
7 29 (49.15%) Open Source
8 28 (47.46%) JUnit
9 27 (45.76%) SonarQube
10 26 (44.07%) DevOps
10 26 (44.07%) RESTful
10 26 (44.07%) SC Cleared
11 25 (42.37%) Web Services
12 24 (40.68%) Mockito
12 24 (40.68%) PowerMock
13 23 (38.98%) DbUnit
13 23 (38.98%) jMock
13 23 (38.98%) SOAP
14 22 (37.29%) Microservices
15 21 (35.59%) Apache Camel
15 21 (35.59%) Kanban
15 21 (35.59%) Amazon EC2
16 19 (32.20%) Spring Boot
17 17 (28.81%) J2EE
18 16 (27.12%) E-Commerce

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 3 (5.08%) Tomcat
2 2 (3.39%) Apache Solr
2 2 (3.39%) Confluence
2 2 (3.39%) Elasticsearch
3 1 (1.69%) Apache Spark
3 1 (1.69%) JBoss
3 1 (1.69%) Red Hat Fuse
Cloud Services
1 37 (62.71%) AWS
2 21 (35.59%) Amazon EC2
3 12 (20.34%) GitHub
4 7 (11.86%) Amazon SQS
5 3 (5.08%) npm
6 2 (3.39%) Apigee
7 1 (1.69%) Azure
7 1 (1.69%) Azure Functions
7 1 (1.69%) Serverless
Communications & Networking
1 1 (1.69%) DSL
1 1 (1.69%) Kerberos
1 1 (1.69%) OpenLDAP
Database & Business Intelligence
1 13 (22.03%) PostgreSQL
2 7 (11.86%) Amazon RDS
3 6 (10.17%) NoSQL
4 4 (6.78%) Cosmos DB
4 4 (6.78%) MongoDB
4 4 (6.78%) SQL Server
5 1 (1.69%) Amazon Aurora
5 1 (1.69%) Big Data
5 1 (1.69%) Hadoop
5 1 (1.69%) HBase
Development Applications
1 37 (62.71%) Git (software)
1 37 (62.71%) Maven
2 35 (59.32%) Jenkins
3 28 (47.46%) JUnit
4 27 (45.76%) SonarQube
5 24 (40.68%) Mockito
6 23 (38.98%) DbUnit
6 23 (38.98%) jMock
7 9 (15.25%) GitLab
8 6 (10.17%) Cucumber
8 6 (10.17%) Gradle
9 5 (8.47%) Sonatype Nexus
10 4 (6.78%) Artifactory
10 4 (6.78%) Selenium
11 3 (5.08%) Grunt
11 3 (5.08%) gulp
11 3 (5.08%) JIRA
11 3 (5.08%) Protractor
11 3 (5.08%) WebDriver
12 2 (3.39%) webpack
General
1 7 (11.86%) Public Sector
2 3 (5.08%) Retail
3 2 (3.39%) Police
4 1 (1.69%) Games
Job Titles
1 39 (66.10%) Developer
2 31 (52.54%) Java Developer
3 10 (16.95%) AWS DevOps
4 9 (15.25%) AWS Engineer
4 9 (15.25%) SC Cleared Java Developer
5 8 (13.56%) AWS DevOps Engineer
5 8 (13.56%) DevOps Engineer
6 5 (8.47%) Front End Developer (Client-Side Developer)
6 5 (8.47%) Senior Developer
7 4 (6.78%) Architect
8 3 (5.08%) AWS Architect
8 3 (5.08%) J2EE Developer
8 3 (5.08%) Java/J2EE Developer
8 3 (5.08%) Senior Java Developer
9 2 (3.39%) Applications Developer
9 2 (3.39%) AWS Developer
9 2 (3.39%) Linux DevOps Engineer
9 2 (3.39%) Linux Engineer
9 2 (3.39%) Python Developer
9 2 (3.39%) Scrum Master
Libraries, Frameworks & Software Standards
1 29 (49.15%) Spring
2 26 (44.07%) RESTful
3 25 (42.37%) Web Services
4 24 (40.68%) PowerMock
5 23 (38.98%) SOAP
6 21 (35.59%) Apache Camel
7 19 (32.20%) Spring Boot
8 17 (28.81%) J2EE
9 11 (18.64%) AngularJS
9 11 (18.64%) REST
10 8 (13.56%) ActiveMQ
10 8 (13.56%) CSS
10 8 (13.56%) Hibernate
10 8 (13.56%) HTML
11 6 (10.17%) CSS3
11 6 (10.17%) HTML5
11 6 (10.17%) JPA
11 6 (10.17%) Node.js
12 5 (8.47%) WireMock
13 4 (6.78%) Redux
Miscellaneous
1 13 (22.03%) Greenfield Project
2 7 (11.86%) Data Centre
3 5 (8.47%) Analytical Skills
4 4 (6.78%) Mobile App
5 3 (5.08%) NHS
6 2 (3.39%) User Experience
7 1 (1.69%) Public Cloud
Operating Systems
1 4 (6.78%) Linux
2 2 (3.39%) Windows
3 1 (1.69%) CentOS
3 1 (1.69%) Red Hat Enterprise Linux
3 1 (1.69%) Unix
Processes & Methodologies
1 50 (84.75%) Agile Software Development
2 37 (62.71%) BDD
3 33 (55.93%) Scrum
4 31 (52.54%) Continuous Integration
5 29 (49.15%) Open Source
6 26 (44.07%) DevOps
7 22 (37.29%) Microservices
8 21 (35.59%) Kanban
9 16 (27.12%) E-Commerce
10 14 (23.73%) Virtual Infrastructure
11 13 (22.03%) Test Automation
12 8 (13.56%) Migration
13 6 (10.17%) BPMN
13 6 (10.17%) Front End Development
14 5 (8.47%) Continuous Improvement
14 5 (8.47%) High Availability
14 5 (8.47%) Low Latency
14 5 (8.47%) Scaled Agile Framework
14 5 (8.47%) User Stories
15 4 (6.78%) Web Accessibility
Programming Languages
1 40 (67.80%) Java
2 10 (16.95%) SQL
3 7 (11.86%) JavaScript
4 4 (6.78%) Java 9
4 4 (6.78%) Python
5 2 (3.39%) Groovy
5 2 (3.39%) Shell Script
5 2 (3.39%) TypeScript
6 1 (1.69%) C#
6 1 (1.69%) ES6
6 1 (1.69%) Java 8
Qualifications
1 37 (62.71%) Security Cleared
2 26 (44.07%) SC Cleared
3 1 (1.69%) BPSS Clearance
Quality Assurance & Compliance
1 1 (1.69%) WCAG
System Software
1 14 (23.73%) VMware Infrastructure
1 14 (23.73%) vSphere
2 12 (20.34%) Docker
3 7 (11.86%) Postfix
Systems Management
1 11 (18.64%) Ansible
1 11 (18.64%) Kubernetes
2 9 (15.25%) Terraform
3 1 (1.69%) ZABBIX
Vendors
1 14 (23.73%) VMware
2 2 (3.39%) Google
3 1 (1.69%) Atlassian
3 1 (1.69%) Cognizant
3 1 (1.69%) Red Hat