The following table provides summary statistics for contract job vacancies advertised in Croydon with a requirement for Open Source skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Open Source over the 3 months to 25 April 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.

Open Source
London / Croydon
3 months to
25 Apr 2017
Same period 2016 Same period 2015
Rank 25 26 25
Rank change year-on-year +1 -1  
Contract jobs citing Open Source 5 13 2
As % of all contract IT jobs advertised in Croydon 3.13% 4.74% 1.39%
As % of the Processes & Methodologies category 3.70% 5.12% 1.56%
Number of daily rates quoted 2 9 2
Median daily rate £525 £413 £413
Median daily rate % change year-on-year +27.27% -  
90% offered a daily rate of more than £505 £385 £403
10% offered a daily rate of more than £545 £475 £423
UK excluding London median daily rate £469 £438 £400
% change year-on-year +7.14% +9.37%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £42.50 £30.00 £39.90
% change year-on-year +41.66% -24.81%  

Open Source is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Croydon with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Croydon
Contract job vacancies with a requirement for process and methodology skills 135 254 128
As % of all contract IT job vacancies advertised in Croydon 84.38% 92.70% 88.89%
Number of daily rates quoted 74 209 110
Median daily rate £450 £413 £425
Median daily rate % change year-on-year +9.09% -2.94%  
90% offered a daily rate of more than £400 £320 £300
10% offered a daily rate of more than £650 £550 £500
UK excluding London median daily rate £413 £400 £393
% change year-on-year +3.12% +1.91%  
Number of hourly rates quoted 0 5 1
Median hourly rate - £21.00 £40.00
Median hourly rate % change year-on-year - -47.50%  
UK excluding London median hourly rate £36.00 £36.52 £30.35
% change year-on-year -1.42% +20.32%  

Open Source
Job Vacancy Trend in Croydon

The job posting trend of jobs advertised in Croydon citing Open Source as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for Open Source in Croydon

Open Source
Contractor Daily Rate Trend in Croydon

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Open Source in Croydon.

Contractor daily rate trend for Open Source in Croydon

For the 6 months to 25 April 2017, IT contractor jobs citing Open Source 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 Open Source.

1 9 (69.23%) Java
2 8 (61.54%) Agile Software Development
3 6 (46.15%) Configuration Management
3 6 (46.15%) SC Cleared
3 6 (46.15%) Security Cleared
4 5 (38.46%) REST
4 5 (38.46%) Web Services
5 4 (30.77%) Amazon AWS
5 4 (30.77%) QA
5 4 (30.77%) Selenium
5 4 (30.77%) Test Automation
6 3 (23.08%) Scala
6 3 (23.08%) GitHub
6 3 (23.08%) Akka
6 3 (23.08%) Play Framework
6 3 (23.08%) Docker
6 3 (23.08%) DevOps
6 3 (23.08%) Functional Programming
6 3 (23.08%) Service Design
6 3 (23.08%) Git (software)
6 3 (23.08%) Service Management
6 3 (23.08%) Linux
7 2 (15.38%) SQL
7 2 (15.38%) JUnit
7 2 (15.38%) SOAP
7 2 (15.38%) TDD
7 2 (15.38%) NUnit
7 2 (15.38%) Spring
7 2 (15.38%) ITIL
7 2 (15.38%) Apache CXF

Open Source
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:

Cloud Services
1 4 (30.77%) Amazon AWS
2 3 (23.08%) GitHub
3 1 (7.69%) Microsoft Azure
Database & Business Intelligence
1 2 (15.38%) NoSQL
2 1 (7.69%) Big Data
2 1 (7.69%) MongoDB
2 1 (7.69%) PostgreSQL
Development Applications
1 4 (30.77%) Selenium
2 3 (23.08%) Git (software)
3 2 (15.38%) FitNesse
3 2 (15.38%) Jenkins
3 2 (15.38%) JUnit
3 2 (15.38%) NUnit
4 1 (7.69%) Atlassian Bamboo
4 1 (7.69%) Cucumber
4 1 (7.69%) Gradle
4 1 (7.69%) Hudson
4 1 (7.69%) Vagrant
Job Titles
1 5 (38.46%) Developer
2 3 (23.08%) Java Developer
3 2 (15.38%) DevOps Engineer
3 2 (15.38%) Scala Developer
4 1 (7.69%) Agile Developer
4 1 (7.69%) Agile Test Manager
4 1 (7.69%) Analyst
4 1 (7.69%) Architect
4 1 (7.69%) Automation Tester
4 1 (7.69%) Developer in Test
4 1 (7.69%) Selenium Automation Tester
4 1 (7.69%) Selenium Tester
4 1 (7.69%) Service Architect
4 1 (7.69%) Service Manager
4 1 (7.69%) Test Analyst
4 1 (7.69%) Test Engineer
4 1 (7.69%) Test Manager
4 1 (7.69%) Tester
4 1 (7.69%) Web Automation Tester
4 1 (7.69%) Web Tester
Libraries, Frameworks & Software Standards
1 5 (38.46%) REST
1 5 (38.46%) Web Services
2 3 (23.08%) Akka
2 3 (23.08%) Play Framework
3 2 (15.38%) Apache CXF
3 2 (15.38%) jBPM
3 2 (15.38%) SOAP
3 2 (15.38%) Spring
4 1 (7.69%) Elastic Stack
4 1 (7.69%) Hibernate
4 1 (7.69%) J2EE
4 1 (7.69%) Node.js
4 1 (7.69%) RabbitMQ
4 1 (7.69%) spray
4 1 (7.69%) Symfony
4 1 (7.69%) XML
Operating Systems
1 3 (23.08%) Linux
2 1 (7.69%) CoreOS
Processes & Methodologies
1 8 (61.54%) Agile Software Development
2 6 (46.15%) Configuration Management
3 4 (30.77%) Test Automation
4 3 (23.08%) DevOps
4 3 (23.08%) Functional Programming
4 3 (23.08%) Service Design
4 3 (23.08%) Service Management
5 2 (15.38%) BDD
5 2 (15.38%) Build Automation
5 2 (15.38%) Continuous Integration
5 2 (15.38%) Functional Testing
5 2 (15.38%) ITIL
5 2 (15.38%) Operational Acceptance Testing
5 2 (15.38%) Refactoring
5 2 (15.38%) System Integration Testing
5 2 (15.38%) TDD
5 2 (15.38%) User Acceptance Testing
6 1 (7.69%) Data Protection
6 1 (7.69%) Integration Testing
6 1 (7.69%) Test Scripting
Programming Languages
1 9 (69.23%) Java
2 3 (23.08%) Scala
3 2 (15.38%) SQL
4 1 (7.69%) Bash Shell
4 1 (7.69%) Go
4 1 (7.69%) JavaScript
4 1 (7.69%) Perl
4 1 (7.69%) PHP
4 1 (7.69%) Python
Qualifications
1 6 (46.15%) SC Cleared
1 6 (46.15%) Security Cleared
Quality Assurance & Compliance
1 4 (30.77%) QA
2 1 (7.69%) SDET
System Software
1 3 (23.08%) Docker
2 1 (7.69%) VMware Workstation
Systems Management
1 2 (15.38%) Kubernetes
2 1 (7.69%) Ansible
2 1 (7.69%) Puppet
2 1 (7.69%) Sysdig
Vendors
1 1 (7.69%) VMware