The following table provides summary statistics for contract job vacancies advertised in London with a requirement for JRuby skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JRuby over the 3 months to 24 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.

JRuby
England / London
3 months to
24 Apr 2017
Same period 2016 Same period 2015
Rank 396 426 -
Rank change year-on-year +30 -  
Contract jobs citing JRuby 4 10 0
As % of all contract IT jobs advertised in London 0.020% 0.043% -
As % of the Libraries, Frameworks & Software Standards category 0.057% 0.14% -
Number of daily rates quoted 3 10 0
Median daily rate £800 £575 -
Median daily rate % change year-on-year +39.13% -  
UK excluding London median daily rate - £394 £450
% change year-on-year - -12.50%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

JRuby is in the industry standards, technical specifications and software library and framework skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in London with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
London
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 7003 7401 6908
As % of all contract IT job vacancies advertised in London 34.74% 31.95% 30.47%
Number of daily rates quoted 5228 5586 4915
Median daily rate £475 £450 £425
Median daily rate % change year-on-year +5.55% +5.88%  
90% offered a daily rate of more than £340 £325 £308
10% offered a daily rate of more than £613 £600 £575
UK excluding London median daily rate £375 £375 £350
% change year-on-year - +7.14%  
Number of hourly rates quoted 53 25 31
Median hourly rate £45.00 £26.25 £22.18
Median hourly rate % change year-on-year +71.42% +18.34%  
90% offered a hourly rate of more than £17.01 £17.35 £19.00
10% offered a hourly rate of more than £55.00 £54.00 £55.00
UK excluding London median hourly rate £41.50 £38.00 £36.25
% change year-on-year +9.21% +4.82%  

JRuby
Job Vacancy Trend in London

The job posting trend of jobs advertised in London citing JRuby as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for JRuby in London

JRuby
Contractor Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing JRuby in London.

Contractor daily rate trend for JRuby in London

JRuby
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing JRuby in London over the 3 months to 24 April 2017.

Contractor daily rate histogram for JRuby in London

For the 6 months to 24 April 2017, IT contractor jobs citing JRuby 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 London region with a requirement for JRuby.

1 4 (66.67%) Java
1 4 (66.67%) Finance
1 4 (66.67%) Scrum
1 4 (66.67%) Jython
1 4 (66.67%) Agile Software Development
1 4 (66.67%) Groovy
1 4 (66.67%) Scala
1 4 (66.67%) Amazon AWS
1 4 (66.67%) Clojure
2 3 (50.00%) RabbitMQ
2 3 (50.00%) CSS3
2 3 (50.00%) Responsive Web Design
2 3 (50.00%) HTML
2 3 (50.00%) HTML5
2 3 (50.00%) Puppet
2 3 (50.00%) MongoDB
2 3 (50.00%) AngularJS
2 3 (50.00%) Analytical Skills
2 3 (50.00%) Grails
2 3 (50.00%) YUI
2 3 (50.00%) jQuery
2 3 (50.00%) TDD
2 3 (50.00%) JavaScript
2 3 (50.00%) MySQL
2 3 (50.00%) CSS
2 3 (50.00%) Python
3 2 (33.33%) REST
3 2 (33.33%) Video on Demand
4 1 (16.67%) PaaS
4 1 (16.67%) NoSQL

JRuby
Co-occurring IT Skills in London 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 1 (16.67%) Elasticsearch
1 1 (16.67%) Tomcat
Cloud Services
1 4 (66.67%) Amazon AWS
2 1 (16.67%) Amazon EC2
2 1 (16.67%) Amazon S3
2 1 (16.67%) AWS OpsWorks
2 1 (16.67%) PaaS
Database & Business Intelligence
1 3 (50.00%) MongoDB
1 3 (50.00%) MySQL
2 1 (16.67%) NoSQL
2 1 (16.67%) Redis
Development Applications
1 1 (16.67%) Capybara
1 1 (16.67%) Cucumber
1 1 (16.67%) Geb
1 1 (16.67%) Git (software)
1 1 (16.67%) Gradle
1 1 (16.67%) JIRA
1 1 (16.67%) JUnit
1 1 (16.67%) Spock
1 1 (16.67%) Vagrant
General
1 4 (66.67%) Finance
Job Titles
1 3 (50.00%) Developer
2 2 (33.33%) Development Team Leader
2 2 (33.33%) Java Developer
2 2 (33.33%) Java Development Team Leader
2 2 (33.33%) Java Team Leader
2 2 (33.33%) Senior Developer
2 2 (33.33%) Senior Java Developer
2 2 (33.33%) Team Leader
2 2 (33.33%) Technical Leader
2 2 (33.33%) Technical Team Leader
3 1 (16.67%) Ruby on Rails Developer
3 1 (16.67%) Test Automation Engineer
3 1 (16.67%) Test Engineer
Libraries, Frameworks & Software Standards
1 3 (50.00%) AngularJS
1 3 (50.00%) CSS
1 3 (50.00%) CSS3
1 3 (50.00%) Grails
1 3 (50.00%) HTML
1 3 (50.00%) HTML5
1 3 (50.00%) jQuery
1 3 (50.00%) RabbitMQ
1 3 (50.00%) YUI
2 2 (33.33%) REST
3 1 (16.67%) Node.js
3 1 (16.67%) Ruby on Rails
3 1 (16.67%) RxJava
Miscellaneous
1 3 (50.00%) Analytical Skills
2 2 (33.33%) Video on Demand
3 1 (16.67%) Enterprise Software
3 1 (16.67%) Mobile App
3 1 (16.67%) Over-the-Top Content
Processes & Methodologies
1 4 (66.67%) Agile Software Development
1 4 (66.67%) Scrum
2 3 (50.00%) Responsive Web Design
2 3 (50.00%) TDD
3 1 (16.67%) Active Record
3 1 (16.67%) API Testing
3 1 (16.67%) Automated Testing
3 1 (16.67%) BDD
3 1 (16.67%) Case Management
3 1 (16.67%) Compatibility Testing
3 1 (16.67%) Defect Tracking
3 1 (16.67%) Kanban
Programming Languages
1 4 (66.67%) Clojure
1 4 (66.67%) Groovy
1 4 (66.67%) Java
1 4 (66.67%) Jython
1 4 (66.67%) Scala
2 3 (50.00%) JavaScript
2 3 (50.00%) Python
3 1 (16.67%) Erlang
3 1 (16.67%) Go
3 1 (16.67%) Ruby
3 1 (16.67%) SQL
Qualifications
1 1 (16.67%) ISEB
System Software
1 1 (16.67%) Docker
Systems Management
1 3 (50.00%) Puppet