The following table provides summary statistics for contract job vacancies 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 28 March 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
UK
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 604 626 636
Rank change year-on-year +22 +10  
Contract jobs citing JRuby 4 13 6
As % of all contract IT jobs advertised in the UK 0.009% 0.024% 0.011%
As % of the Libraries, Frameworks & Software Standards category 0.028% 0.087% 0.042%
Number of daily rates quoted 1 12 5
Median daily rate £650 £550 £450
Median daily rate % change year-on-year +18.18% +22.22%  
UK excluding London median daily rate - £325 £450
% change year-on-year - -27.77%  
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 with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
UK
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 14193 14997 14342
As % of all contract IT job vacancies advertised in the UK 31.48% 27.99% 26.55%
Number of daily rates quoted 9846 10410 9296
Median daily rate £425 £400 £388
Median daily rate % change year-on-year +6.25% +3.22%  
90% offered a daily rate of more than £300 £300 £275
10% offered a daily rate of more than £563 £550 £550
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 183 223 192
Median hourly rate £42.50 £38.75 £35.00
Median hourly rate % change year-on-year +9.67% +10.71%  
90% offered a hourly rate of more than £16.00 £13.00 £19.00
10% offered a hourly rate of more than £55.00 £60.62 £46.50
UK excluding London median hourly rate £40.50 £38.00 £36.00
% change year-on-year +6.57% +5.55%  

JRuby
Job Vacancy Trend

The job posting trend of jobs advertised 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 the UK

JRuby
Contractor Daily Rate Trend

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

Contractor daily rate trend for JRuby in the UK

JRuby
Top 4 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing JRuby within the UK over the 3 months to 28 March 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +20 2 £650 +18.18% 2
London +15 2 £650 +18.18%
Glasgow - 2 - -
Scotland - 2 - -

For the 6 months to 28 March 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 with a requirement for JRuby.

1 7 (77.78%) Scrum
1 7 (77.78%) Jython
1 7 (77.78%) Java
1 7 (77.78%) Agile Software Development
1 7 (77.78%) Groovy
2 5 (55.56%) Scala
2 5 (55.56%) Clojure
2 5 (55.56%) JavaScript
2 5 (55.56%) CSS
2 5 (55.56%) MySQL
2 5 (55.56%) HTML
2 5 (55.56%) REST
2 5 (55.56%) Analytical Skills
3 4 (44.44%) MongoDB
3 4 (44.44%) Finance
3 4 (44.44%) Amazon AWS
3 4 (44.44%) TDD
4 3 (33.33%) Grails
4 3 (33.33%) YUI
4 3 (33.33%) jQuery
4 3 (33.33%) Puppet
4 3 (33.33%) HTML5
4 3 (33.33%) MVC
4 3 (33.33%) SQL
4 3 (33.33%) SOAP
4 3 (33.33%) Web Services
4 3 (33.33%) Python
4 3 (33.33%) RabbitMQ
4 3 (33.33%) CSS3
4 3 (33.33%) Responsive Web Design

JRuby
Co-occurring IT Skills 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 2 (22.22%) Adobe Experience Manager
1 2 (22.22%) CMS
1 2 (22.22%) GlassFish
1 2 (22.22%) Oracle SOA Suite
1 2 (22.22%) Tomcat
2 1 (11.11%) Elasticsearch
Cloud Services
1 4 (44.44%) Amazon AWS
2 1 (11.11%) Amazon EC2
2 1 (11.11%) Amazon S3
2 1 (11.11%) AWS OpsWorks
2 1 (11.11%) GitHub
2 1 (11.11%) PaaS
Database & Business Intelligence
1 5 (55.56%) MySQL
2 4 (44.44%) MongoDB
3 2 (22.22%) NoSQL
3 2 (22.22%) Oracle Database
3 2 (22.22%) Oracle Database 11g
4 1 (11.11%) Redis
Development Applications
1 2 (22.22%) Git (software)
1 2 (22.22%) Gradle
1 2 (22.22%) Oracle APEX
1 2 (22.22%) Spock
2 1 (11.11%) Ant
2 1 (11.11%) Capybara
2 1 (11.11%) Cucumber
2 1 (11.11%) EasyMock
2 1 (11.11%) Geb
2 1 (11.11%) JIRA
2 1 (11.11%) jMock
2 1 (11.11%) JUnit
2 1 (11.11%) Maven
2 1 (11.11%) Mockito
2 1 (11.11%) Selenium
2 1 (11.11%) Subversion
2 1 (11.11%) Vagrant
General
1 4 (44.44%) Finance
Job Titles
1 8 (88.89%) Developer
2 5 (55.56%) Java Developer
3 4 (44.44%) Senior Developer
3 4 (44.44%) Senior Java Developer
4 1 (11.11%) Ruby on Rails Developer
4 1 (11.11%) Test Automation Engineer
4 1 (11.11%) Test Engineer
Libraries, Frameworks & Software Standards
1 5 (55.56%) CSS
1 5 (55.56%) HTML
1 5 (55.56%) REST
2 3 (33.33%) AngularJS
2 3 (33.33%) CSS3
2 3 (33.33%) Grails
2 3 (33.33%) HTML5
2 3 (33.33%) jQuery
2 3 (33.33%) RabbitMQ
2 3 (33.33%) SOAP
2 3 (33.33%) Web Services
2 3 (33.33%) YUI
3 2 (22.22%) Apache Felix
3 2 (22.22%) Apache Sling
3 2 (22.22%) Java EE
3 2 (22.22%) JSP
3 2 (22.22%) JSTL
3 2 (22.22%) Servlets
3 2 (22.22%) XML
4 1 (11.11%) Node.js
Miscellaneous
1 5 (55.56%) Analytical Skills
2 2 (22.22%) Video on Demand
3 1 (11.11%) Enterprise Software
3 1 (11.11%) Mobile App
3 1 (11.11%) Over-the-Top Content
Operating Systems
1 1 (11.11%) Linux
1 1 (11.11%) Unix
Processes & Methodologies
1 7 (77.78%) Agile Software Development
1 7 (77.78%) Scrum
2 4 (44.44%) TDD
3 3 (33.33%) MVC
3 3 (33.33%) Responsive Web Design
4 2 (22.22%) BDD
4 2 (22.22%) Configuration Management
4 2 (22.22%) Content Management
4 2 (22.22%) People Management
4 2 (22.22%) Performance Testing
4 2 (22.22%) SDLC
4 2 (22.22%) SOA
4 2 (22.22%) Waterfall
5 1 (11.11%) Active Record
5 1 (11.11%) API Testing
5 1 (11.11%) Automated Testing
5 1 (11.11%) Case Management
5 1 (11.11%) Compatibility Testing
5 1 (11.11%) Defect Tracking
5 1 (11.11%) Kanban
Programming Languages
1 7 (77.78%) Groovy
1 7 (77.78%) Java
1 7 (77.78%) Jython
2 5 (55.56%) Clojure
2 5 (55.56%) JavaScript
2 5 (55.56%) Scala
3 3 (33.33%) Python
3 3 (33.33%) SQL
4 1 (11.11%) Erlang
4 1 (11.11%) Go
4 1 (11.11%) Ruby
Qualifications
1 1 (11.11%) Degree
1 1 (11.11%) ISEB
System Software
1 2 (22.22%) Docker
Systems Management
1 3 (33.33%) Puppet
Vendors
1 2 (22.22%) Adobe
1 2 (22.22%) Oracle