Period
to 22 November 2017

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 22 November 2017 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
22 Nov 2017
Same period 2016 Same period 2015
Rank 12 42 20
Rank change year-on-year +30 -22 +6
Contract jobs citing TDD 139 34 31
As % of all contract IT jobs advertised in Croydon 15.96% 6.39% 9.31%
As % of the Processes & Methodologies category 17.44% 7.00% 10.58%
Number of daily rates quoted 90 32 18
Croydon median daily rate £525 £463 £450
Median daily rate % change year-on-year +13.51% +2.78% -35.71%
10th Percentile £419 £382 £350
90th Percentile £641 £594 £519
South London median daily rate £525 £500 £438
% change year-on-year +5.00% +14.29% -1.41%
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 797 486 293
As % of all contract IT jobs advertised in Croydon 91.50% 91.35% 87.99%
Number of daily rates quoted 521 299 187
Croydon median daily rate £500 £425 £425
Median daily rate % change year-on-year +17.65% - -5.56%
10th Percentile £356 £300 £313
90th Percentile £650 £575 £526
South London median daily rate £500 £425 £375
% change year-on-year +17.65% +13.33% -9.09%
Number of hourly rates quoted 3 6 5
Croydon median hourly rate £13.50 £35.25 £27.78
Median hourly rate % change year-on-year -61.70% +26.89% +85.20%
10th Percentile £12.80 £21.00 £11.25
90th Percentile £25.65 £95.00 £29.11
South London median hourly rate £47.50 £20.50 £18.74
% change year-on-year +131.71% +9.38% +17.14%

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 22 November 2017.

Contractor daily rate histogram for TDD in Croydon

For the 6 months to 22 November 2017, IT contractor jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Croydon region with a requirement for TDD.

1 119 (85.61%) Java
2 92 (66.19%) Scrum
3 91 (65.47%) Agile Software Development
4 87 (62.59%) Microservices
5 79 (56.83%) REST
6 77 (55.40%) Security Cleared
7 75 (53.96%) BDD
8 70 (50.36%) Spring
9 68 (48.92%) SC Cleared
10 66 (47.48%) JIRA
11 63 (45.32%) Confluence
11 63 (45.32%) Hadoop
12 62 (44.60%) HBase
13 61 (43.88%) Apache Camel
14 59 (42.45%) Continuous Integration
15 57 (41.01%) Spring Boot
16 52 (37.41%) Cucumber
17 50 (35.97%) Big Data
18 49 (35.25%) PostgreSQL
19 48 (34.53%) OO
20 45 (32.37%) Kubernetes
21 43 (30.94%) Git (software)
22 39 (28.06%) Kafka
23 38 (27.34%) Docker
24 35 (25.18%) Algorithms
24 35 (25.18%) Web Services
25 34 (24.46%) HDFS
25 34 (24.46%) Jenkins
26 33 (23.74%) Linux
27 32 (23.02%) Apache Spark

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 63 (45.32%) Confluence
2 32 (23.02%) Apache Spark
3 29 (20.86%) Apache Solr
4 16 (11.51%) Apache
5 15 (10.79%) Tomcat
6 7 (5.04%) OpenStack
6 7 (5.04%) WebLogic
6 7 (5.04%) WebSphere
7 2 (1.44%) Apache ServiceMix
8 1 (0.72%) Elasticsearch
8 1 (0.72%) JBoss
Applications
1 11 (7.91%) Photoshop
Business Applications
1 1 (0.72%) Oracle BPM
Cloud Services
1 24 (17.27%) GitHub
2 20 (14.39%) Amazon AWS
3 7 (5.04%) Microsoft Azure
4 3 (2.16%) Amazon EC2
5 1 (0.72%) Amazon S3
5 1 (0.72%) npm
Communications & Networking
1 30 (21.58%) Kerberos
Database & Business Intelligence
1 63 (45.32%) Hadoop
2 62 (44.60%) HBase
3 50 (35.97%) Big Data
4 49 (35.25%) PostgreSQL
5 21 (15.11%) NoSQL
6 7 (5.04%) MySQL
7 5 (3.60%) IBM InfoSphere
8 4 (2.88%) MongoDB
8 4 (2.88%) Relational Database
9 3 (2.16%) Amazon Redshift
9 3 (2.16%) Apache Hive
9 3 (2.16%) DataStax
10 2 (1.44%) SQL Server
11 1 (0.72%) Amazon RDS
11 1 (0.72%) RDBMS
Development Applications
1 66 (47.48%) JIRA
2 52 (37.41%) Cucumber
3 43 (30.94%) Git (software)
4 34 (24.46%) Jenkins
5 31 (22.30%) IntelliJ
6 22 (15.83%) GitLab
7 17 (12.23%) JUnit
7 17 (12.23%) Maven
8 15 (10.79%) Grunt
8 15 (10.79%) Mockito
9 13 (9.35%) Jasmine
9 13 (9.35%) Karma Test Runner
10 12 (8.63%) DbUnit
10 12 (8.63%) jMock
10 12 (8.63%) SonarQube
11 8 (5.76%) NUnit
12 7 (5.04%) MSTest
12 7 (5.04%) Selenium
13 4 (2.88%) gulp
14 3 (2.16%) Protractor
General
1 12 (8.63%) Finance
2 4 (2.88%) Electronics
2 4 (2.88%) Games
2 4 (2.88%) Manufacturing
2 4 (2.88%) Marketing
2 4 (2.88%) Telecoms
3 1 (0.72%) Publishing
Job Titles
1 90 (64.75%) Developer
2 58 (41.73%) Java Developer
3 18 (12.95%) Data Engineer
4 17 (12.23%) SC Cleared Java Developer
5 15 (10.79%) Big Data Developer
6 14 (10.07%) Big Data Engineer
6 14 (10.07%) Scrum Master
7 11 (7.91%) Front End Developer (Client-Side Developer)
8 9 (6.47%) BPM Developer
8 9 (6.47%) Senior Data Engineer
9 7 (5.04%) Architect
9 7 (5.04%) Hadoop Developer
10 6 (4.32%) Hadoop Engineer
11 5 (3.60%) Agile Developer
11 5 (3.60%) Agile Java Developer
12 4 (2.88%) Angular Developer
12 4 (2.88%) Big Data Architect
12 4 (2.88%) Data Architect
12 4 (2.88%) UI Developer
13 3 (2.16%) JavaScript Developer
Libraries, Frameworks & Software Standards
1 79 (56.83%) REST
2 70 (50.36%) Spring
3 61 (43.88%) Apache Camel
4 57 (41.01%) Spring Boot
5 39 (28.06%) Kafka
6 35 (25.18%) Web Services
7 31 (22.30%) HTML
8 29 (20.86%) Drools
9 27 (19.42%) AngularJS
10 26 (18.71%) CSS
11 24 (17.27%) HTML5
12 22 (15.83%) CSS3
13 19 (13.67%) RESTful
14 14 (10.07%) J2EE
15 13 (9.35%) SOAP
16 12 (8.63%) PowerMock
17 9 (6.47%) Samza
18 7 (5.04%) JSON
18 7 (5.04%) XML
19 6 (4.32%) Node.js
Miscellaneous
1 35 (25.18%) Algorithms
2 5 (3.60%) Enterprise Software
3 3 (2.16%) Analytical Skills
4 1 (0.72%) Greenfield Project
Operating Systems
1 33 (23.74%) Linux
2 1 (0.72%) Red Hat Enterprise Linux
2 1 (0.72%) Unix
2 1 (0.72%) VMS
Processes & Methodologies
1 92 (66.19%) Scrum
2 91 (65.47%) Agile Software Development
3 87 (62.59%) Microservices
4 75 (53.96%) BDD
5 59 (42.45%) Continuous Integration
6 48 (34.53%) OO
7 32 (23.02%) Test Automation
8 28 (20.14%) Data Architecture
9 27 (19.42%) Kanban
10 18 (12.95%) Mentoring
11 16 (11.51%) MVC
11 16 (11.51%) Web Development
12 15 (10.79%) User Stories
13 14 (10.07%) Open Source
14 13 (9.35%) Responsive Web Design
15 12 (8.63%) Front End Development
15 12 (8.63%) MVVM
16 11 (7.91%) DevOps
16 11 (7.91%) E-Commerce
16 11 (7.91%) Technical Architecture
Programming Languages
1 119 (85.61%) Java
2 21 (15.11%) JavaScript
3 9 (6.47%) Scala
4 5 (3.60%) Python
5 4 (2.88%) SQL
6 3 (2.16%) Groovy
7 2 (1.44%) R
7 2 (1.44%) Ruby
8 1 (0.72%) C++
8 1 (0.72%) Perl
8 1 (0.72%) PL/SQL
8 1 (0.72%) Shell Script
Qualifications
1 77 (55.40%) Security Cleared
2 68 (48.92%) SC Cleared
3 2 (1.44%) Degree
3 2 (1.44%) DV Cleared
4 1 (0.72%) DBS Check
Quality Assurance & Compliance
1 2 (1.44%) QA
2 1 (0.72%) Disclosure Scotland
System Software
1 38 (27.34%) Docker
2 34 (24.46%) HDFS
3 24 (17.27%) Apache ZooKeeper
4 2 (1.44%) VMware Infrastructure
4 2 (1.44%) vSphere
Systems Management
1 45 (32.37%) Kubernetes
2 27 (19.42%) Ansible
3 20 (14.39%) Terraform
4 9 (6.47%) Puppet
5 7 (5.04%) Hadoop YARN
5 7 (5.04%) Opscode Chef
6 1 (0.72%) HP Quality Center
Vendors
1 11 (7.91%) Adobe
2 10 (7.19%) Oracle
3 4 (2.88%) IBM
3 4 (2.88%) SAP
3 4 (2.88%) VMware
4 3 (2.16%) Hortonworks
5 1 (0.72%) Capita
5 1 (0.72%) HP
5 1 (0.72%) Informatica