Period
to 13 July 2020

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for JNI skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JNI over the 6 months to 13 July 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.

Java Native Interface (JNI)
Central London > City of London
6 months to
13 Jul 2020
Same period 2019 Same period 2018
Rank 140 242 260
Rank change year-on-year +102 +18 -
Contract jobs citing JNI 1 1 2
As % of all contract jobs advertised in the City of London 0.038% 0.015% 0.028%
As % of the Libraries, Frameworks & Software Standards category 0.11% 0.040% 0.072%
Number of daily rates quoted 1 1 2
Median daily rate £425 £650 £383
Median daily rate % change year-on-year -34.62% +69.93% -
10th Percentile £413 £625 £307
90th Percentile £438 £675 £468
Central London median daily rate £425 £650 £383
% change year-on-year -34.62% +69.93% -
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
Central London median hourly rate - - -

JNI 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 894 2,509 2,787
As % of all contract IT jobs advertised in the City of London 33.53% 37.24% 38.98%
Number of daily rates quoted 659 2,023 2,275
Median daily rate £525 £525 £525
10th Percentile £375 £413 £363
90th Percentile £688 £675 £675
Central London median daily rate £525 £525 £513
% change year-on-year - +2.44% +2.60%
Number of hourly rates quoted 10 11 15
Median hourly rate £35.00 £44.57 £21.50
Median hourly rate % change year-on-year -21.46% +107.28% -12.19%
10th Percentile £31.83 £22.25 £21.00
90th Percentile £57.88 £60.75 £55.00
Median hourly rate £35.00 £46.85 £22.00
% change year-on-year -25.29% +112.94% -9.92%

JNI
Job Vacancy Trend in the City of London

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

Job vacancy trend for JNI in the City of London

JNI
Contractor Daily Rate Trend in the City of London

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

Daily rate trend for JNI in the City of London

For the 6 months to 13 July 2020, IT contractor jobs citing JNI 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 JNI.

1 1 (100.00%) C
1 1 (100.00%) C++
1 1 (100.00%) OO
1 1 (100.00%) OOD
1 1 (100.00%) Agile Software Development
1 1 (100.00%) Spring
1 1 (100.00%) Google
1 1 (100.00%) Degree
1 1 (100.00%) Computer Science
1 1 (100.00%) Android
1 1 (100.00%) Apple iOS
1 1 (100.00%) iOS SDK
1 1 (100.00%) Android SDK
1 1 (100.00%) Android Development
1 1 (100.00%) User Experience
1 1 (100.00%) Analytical Skills
1 1 (100.00%) Algorithms
1 1 (100.00%) Mobile Development
1 1 (100.00%) Kotlin
1 1 (100.00%) Google Play
1 1 (100.00%) Material Design
1 1 (100.00%) Computer Science Degree
1 1 (100.00%) Problem-Solving
1 1 (100.00%) Technical Leadership

JNI
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:

Cloud Services
1 1 (100.00%) Google Play
Job Titles
1 1 (100.00%) Android Developer
1 1 (100.00%) Developer
Libraries, Frameworks & Software Standards
1 1 (100.00%) Android SDK
1 1 (100.00%) iOS SDK
1 1 (100.00%) Material Design
1 1 (100.00%) Spring
Miscellaneous
1 1 (100.00%) Algorithms
1 1 (100.00%) Analytical Skills
1 1 (100.00%) User Experience
Operating Systems
1 1 (100.00%) Android
1 1 (100.00%) Apple iOS
Processes & Methodologies
1 1 (100.00%) Agile Software Development
1 1 (100.00%) Android Development
1 1 (100.00%) Computer Science
1 1 (100.00%) Mobile Development
1 1 (100.00%) OO
1 1 (100.00%) OOD
1 1 (100.00%) Problem-Solving
1 1 (100.00%) Technical Leadership
Programming Languages
1 1 (100.00%) C
1 1 (100.00%) C++
1 1 (100.00%) Kotlin
Qualifications
1 1 (100.00%) Computer Science Degree
1 1 (100.00%) Degree
Vendors
1 1 (100.00%) Google