The following table provides summary statistics for permanent job vacancies advertised in London with a requirement for JRuby skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited JRuby over the 3 months to 29 June 2017 with a comparison to the same period in the previous 2 years.

JRuby
England > London
3 months to
29 Jun 2017
Same period 2016 Same period 2015
Rank 617 621 670
Rank change year-on-year +4 +49  
Permanent jobs citing JRuby 1 24 4
As % of all permanent IT jobs advertised in London 0.003% 0.060% 0.009%
As % of the Libraries, Frameworks & Software Standards category 0.007% 0.15% 0.023%
Number of salaries quoted 1 21 4
London median annual salary £97,500 £62,500 £52,500
Median salary % change year-on-year +56.00% +19.04%  
10th Percentile £88,750 £48,750 £48,750
90th Percentile £106,250 £105,000 £72,000
England median annual salary £37,500 £62,500 £52,500
% change year-on-year -40.00% +19.04%  

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 permanent job vacancies advertised in London with a requirement for industry standards, technical specifications and software library and framework skills.

Software Library & Framework Skills
London
Permanent job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 14728 16141 17040
As % of all permanent IT job vacancies advertised in London 40.14% 40.41% 37.90%
Number of salaries quoted 50809 59517 61955
London median annual salary £59,000 £55,000 £55,000
Median salary % change year-on-year +7.27% -  
10th Percentile £36,250 £35,000 £33,000
90th Percentile £85,000 £80,000 £81,250
England median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.55% -  

JRuby
Job Vacancy Trend in London

Job postings citing JRuby as a percentage of all IT jobs advertised in London.

Job vacancy trend for JRuby in London

JRuby
Salary Trend in London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing JRuby in London.

Salary trend for JRuby in London

For the 6 months to 29 June 2017, IT jobs citing JRuby also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the London region with a requirement for JRuby.

1 11 (100.00%) Java
1 11 (100.00%) Groovy
1 11 (100.00%) Scala
2 10 (90.91%) Agile Software Development
3 8 (72.73%) Finance
3 8 (72.73%) Jython
3 8 (72.73%) Spring
3 8 (72.73%) Clojure
4 7 (63.64%) HTML5
4 7 (63.64%) CSS3
4 7 (63.64%) Software Engineering
4 7 (63.64%) Scrum
4 7 (63.64%) JavaScript
4 7 (63.64%) CSS
4 7 (63.64%) HTML
5 6 (54.55%) Web Services
5 6 (54.55%) TDD
6 5 (45.45%) Continuous Integration
6 5 (45.45%) SQL
6 5 (45.45%) JUnit
6 5 (45.45%) Amazon AWS
6 5 (45.45%) Jenkins
7 4 (36.36%) JAX-RS
7 4 (36.36%) REST
7 4 (36.36%) NoSQL
7 4 (36.36%) React
7 4 (36.36%) Concurrent Programming
7 4 (36.36%) Kotlin
7 4 (36.36%) Risk Management
7 4 (36.36%) J2EE

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:

Cloud Services
1 5 (45.45%) Amazon AWS
Database & Business Intelligence
1 4 (36.36%) NoSQL
1 4 (36.36%) SQL Server
2 3 (27.27%) MySQL
Development Applications
1 5 (45.45%) Jenkins
1 5 (45.45%) JUnit
2 4 (36.36%) Atlassian Bamboo
2 4 (36.36%) TestNG
3 1 (9.09%) Git (software)
3 1 (9.09%) Gradle
3 1 (9.09%) Vagrant
General
1 8 (72.73%) Finance
2 2 (18.18%) Telecoms
Job Titles
1 9 (81.82%) Developer
1 9 (81.82%) Java Developer
2 5 (45.45%) Java Engineer
2 5 (45.45%) Java Software Engineer
2 5 (45.45%) Software Engineer
3 4 (36.36%) Developer/Software Engineer
3 4 (36.36%) Java Scala Developer
3 4 (36.36%) Java Software Developer
3 4 (36.36%) Scala Developer
3 4 (36.36%) SQL Developer
4 3 (27.27%) Java Scala Software Engineer
4 3 (27.27%) Scala Software Engineer
5 2 (18.18%) Cloud Developer
5 2 (18.18%) J2EE Developer
5 2 (18.18%) J2EE Software Engineer
5 2 (18.18%) Java J2EE Software Engineer
5 2 (18.18%) Java/J2EE Developer
5 2 (18.18%) Senior Developer
5 2 (18.18%) Senior Java Developer
6 1 (9.09%) Junior Developer
Libraries, Frameworks & Software Standards
1 8 (72.73%) Spring
2 7 (63.64%) CSS
2 7 (63.64%) CSS3
2 7 (63.64%) HTML
2 7 (63.64%) HTML5
3 6 (54.55%) Web Services
4 4 (36.36%) Guice
4 4 (36.36%) J2EE
4 4 (36.36%) JAX-RS
4 4 (36.36%) JAX-WS
4 4 (36.36%) React
4 4 (36.36%) REST
5 3 (27.27%) AngularJS
5 3 (27.27%) Dropwizard
5 3 (27.27%) Grails
5 3 (27.27%) Java EE
5 3 (27.27%) RabbitMQ
5 3 (27.27%) RESTful
5 3 (27.27%) Spring Integration
5 3 (27.27%) Spring MVC
Miscellaneous
1 3 (27.27%) Analytical Skills
1 3 (27.27%) Greenfield Project
2 1 (9.09%) Mobile App
2 1 (9.09%) Over-the-Top Content
2 1 (9.09%) Streaming Video
2 1 (9.09%) Video on Demand
Processes & Methodologies
1 10 (90.91%) Agile Software Development
2 7 (63.64%) Scrum
2 7 (63.64%) Software Engineering
3 6 (54.55%) TDD
4 5 (45.45%) Continuous Integration
5 4 (36.36%) Asset Management
5 4 (36.36%) Concurrent Programming
5 4 (36.36%) Multithreading
5 4 (36.36%) Quantitative Analysis
5 4 (36.36%) Risk Management
5 4 (36.36%) Test Scripting
6 3 (27.27%) B2B
6 3 (27.27%) Continuous Improvement
6 3 (27.27%) MVC
6 3 (27.27%) Open Source
6 3 (27.27%) SDLC
7 2 (18.18%) DSDM
7 2 (18.18%) Kanban
7 2 (18.18%) RUP
7 2 (18.18%) Unit Testing
Programming Languages
1 11 (100.00%) Groovy
1 11 (100.00%) Java
1 11 (100.00%) Scala
2 8 (72.73%) Clojure
2 8 (72.73%) Jython
3 7 (63.64%) JavaScript
4 5 (45.45%) SQL
5 4 (36.36%) Kotlin
6 3 (27.27%) Python
7 1 (9.09%) Erlang
7 1 (9.09%) Go
Qualifications
1 3 (27.27%) Degree
System Software
1 1 (9.09%) Docker