Period
to 31 May 2020

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for RxJava skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited RxJava over the 6 months to 31 May 2020 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.

RxJava
Central London > City of London
6 months to
31 May 2020
Same period 2019 Same period 2018
Rank 136 230 239
Rank change year-on-year +94 +9 -28
Contract jobs citing RxJava 18 9 17
As % of all contract jobs advertised in the City of London 0.59% 0.14% 0.25%
As % of the Libraries, Frameworks & Software Standards category 1.75% 0.36% 0.64%
Number of daily rates quoted 17 6 13
Median daily rate £505 £575 £550
Median daily rate % change year-on-year -12.17% +4.55% +10.00%
10th Percentile £425 £484 £500
90th Percentile £619 £669 £648
Central London median daily rate £505 £538 £550
% change year-on-year -6.05% -2.27% +10.00%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
Central London median hourly rate - - -

RxJava is in the Software Libraries and Frameworks category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
City of London
Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 1,030 2,469 2,673
As % of all contract IT jobs advertised in the City of London 33.69% 38.13% 38.62%
Number of daily rates quoted 771 1,984 2,189
Median daily rate £525 £525 £525
10th Percentile £381 £413 £365
90th Percentile £675 £675 £675
Central London median daily rate £525 £525 £513
% change year-on-year - +2.44% +6.22%
Number of hourly rates quoted 11 10 14
Median hourly rate £35.00 £46.85 £21.75
Median hourly rate % change year-on-year -25.29% +115.39% -12.51%
10th Percentile £24.50 £31.48 £21.08
90th Percentile £57.50 £69.25 £58.23
Median hourly rate £35.00 £46.85 £22.00
% change year-on-year -25.29% +112.94% -11.50%

RxJava
Job Vacancy Trend in the City of London

Job postings citing RxJava as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for RxJava in the City of London

RxJava
Contractor Daily Rate Trend in the City of London

3-month moving average daily rate quoted in jobs citing RxJava in the City of London.

Daily rate trend for RxJava in the City of London

RxJava
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing RxJava in the City of London over the 6 months to 31 May 2020.

Daily rate histogram for RxJava in the City of London

For the 6 months to 31 May 2020, IT contractor jobs citing RxJava also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for RxJava.

1 16 (88.89%) Kotlin
2 15 (83.33%) Java
3 12 (66.67%) Agile Software Development
4 11 (61.11%) Android Development
4 11 (61.11%) Android
5 9 (50.00%) Git (software)
6 7 (38.89%) MVVM
6 7 (38.89%) REST
7 6 (33.33%) Waterfall
7 6 (33.33%) GitHub
7 6 (33.33%) Open Source
7 6 (33.33%) HTML5
7 6 (33.33%) RESTful
7 6 (33.33%) Android Studio
7 6 (33.33%) User Experience
7 6 (33.33%) Jenkins
7 6 (33.33%) Mobile App
7 6 (33.33%) Mobile Payment
7 6 (33.33%) SDLC
7 6 (33.33%) Banking
7 6 (33.33%) Continuous Integration
7 6 (33.33%) Finance
7 6 (33.33%) CSS
7 6 (33.33%) JavaScript
7 6 (33.33%) HTML
7 6 (33.33%) JUnit
7 6 (33.33%) git-flow
7 6 (33.33%) Thought Leadership
8 5 (27.78%) Spring
8 5 (27.78%) Maven

RxJava
Co-occurring IT Skills in the City of 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 3 (16.67%) WebLogic
1 3 (16.67%) WebSphere
Cloud Services
1 6 (33.33%) GitHub
2 2 (11.11%) AWS
Communications & Networking
1 3 (16.67%) HTTP
Development Applications
1 9 (50.00%) Git (software)
2 6 (33.33%) Android Studio
2 6 (33.33%) git-flow
2 6 (33.33%) Jenkins
2 6 (33.33%) JUnit
3 5 (27.78%) Maven
4 3 (16.67%) Ant
4 3 (16.67%) Gradle
4 3 (16.67%) JMeter
4 3 (16.67%) Mockito
5 2 (11.11%) Cucumber
General
1 6 (33.33%) Banking
1 6 (33.33%) Finance
2 3 (16.67%) Automotive
3 2 (11.11%) Retail
Job Titles
1 15 (83.33%) Developer
2 8 (44.44%) Android Developer
3 5 (27.78%) Java Developer
4 4 (22.22%) Applications Developer
5 3 (16.67%) Android Engineer
6 2 (11.11%) DevOps Developer
6 2 (11.11%) DevOps Engineer
6 2 (11.11%) Java Engineer
6 2 (11.11%) Kubernetes Engineer
7 1 (5.56%) Lead Android Developer
7 1 (5.56%) Lead Developer
Libraries, Frameworks & Software Standards
1 7 (38.89%) REST
2 6 (33.33%) CSS
2 6 (33.33%) HTML
2 6 (33.33%) HTML5
2 6 (33.33%) RESTful
3 5 (27.78%) Spring
4 3 (16.67%) Android SDK
4 3 (16.67%) J2EE
4 3 (16.67%) JSON
4 3 (16.67%) SOAP
4 3 (16.67%) Web Services
4 3 (16.67%) XML
5 2 (11.11%) Reactive Extensions
5 2 (11.11%) Vert.x
Miscellaneous
1 6 (33.33%) Mobile App
1 6 (33.33%) Mobile Payment
1 6 (33.33%) User Experience
2 3 (16.67%) Data Structures
2 3 (16.67%) Enterprise Software
Operating Systems
1 11 (61.11%) Android
Processes & Methodologies
1 12 (66.67%) Agile Software Development
2 11 (61.11%) Android Development
3 7 (38.89%) MVVM
4 6 (33.33%) Continuous Integration
4 6 (33.33%) Open Source
4 6 (33.33%) SDLC
4 6 (33.33%) Thought Leadership
4 6 (33.33%) Waterfall
5 4 (22.22%) Digital Banking
5 4 (22.22%) Mobile Development
6 3 (16.67%) API Development
6 3 (16.67%) Backlog Management
6 3 (16.67%) Computer Science
6 3 (16.67%) Multithreaded Programming
6 3 (16.67%) Multithreading
6 3 (16.67%) Pair Programming
6 3 (16.67%) TDD
6 3 (16.67%) Web Development
7 2 (11.11%) DevOps
7 2 (11.11%) Microservices
Programming Languages
1 16 (88.89%) Kotlin
2 15 (83.33%) Java
3 6 (33.33%) JavaScript
4 3 (16.67%) C
Qualifications
1 3 (16.67%) Computer Science Degree
1 3 (16.67%) Degree
Systems Management
1 2 (11.11%) Kubernetes
1 2 (11.11%) Terraform
Vendors
1 3 (16.67%) CA
1 3 (16.67%) CA Agile Central