The following table provides summary statistics for contract job vacancies advertised in 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 3 months to 23 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.

3 months to
23 Mar 2017
Same period 2016 Same period 2015
Java Native Interface (JNI)
England / London
Rank 376 416 400
Rank change year-on-year +40 -16  
Contract jobs citing JNI 26 3 9
As % of all contract IT jobs advertised in London 0.14% 0.014% 0.043%
As % of the Libraries, Frameworks & Software Standards category 0.39% 0.043% 0.14%
Number of daily rates quoted 15 1 9
Median daily rate £525 £450 £650
Median daily rate % change year-on-year +16.66% -30.76%  
UK excluding London median daily rate - - £325
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

JNI 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 6686 6989 6301
As % of all contract IT job vacancies advertised in London 34.81% 31.78% 30.16%
Number of daily rates quoted 4978 5229 4550
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 £345 £325 £313
10% offered a daily rate of more than £613 £600 £575
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 46 30 27
Median hourly rate £47.50 £48.92 £27.37
Median hourly rate % change year-on-year -2.89% +78.71%  
90% offered a hourly rate of more than £17.35 £22.00 £20.00
10% offered a hourly rate of more than £100.00 £55.00 £55.00
UK excluding London median hourly rate £40.00 £38.00 £36.00
% change year-on-year +5.26% +5.55%  

JNI
Job Vacancy Trend in London

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

Job vacancy trend for JNI in London

JNI
Contractor Daily Rate Trend in London

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

Contractor daily rate trend for JNI in London

JNI
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing JNI in London over the 3 months to 23 March 2017.

Contractor daily rate histogram for JNI in London

JNI
Contractor Hourly Rate Trend in London

This chart provides the 3-month moving average for hourly rates quoted in IT contractor jobs citing JNI in London.

Contractor hourly rate trend for JNI in London

JNI
Top 30 Related IT Skills in London

For the 6 months to 23 March 2017, IT contractor jobs citing JNI 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 JNI.

1 35 (100.00%) C++
2 30 (85.71%) Java
3 26 (74.29%) C
4 25 (71.43%) Electronic Trading
5 24 (68.57%) Foreign Exchange (FX)
6 22 (62.86%) Multithreading
7 21 (60.00%) Low Latency
7 21 (60.00%) SDLC
7 21 (60.00%) Equities
8 20 (57.14%) Finance
8 20 (57.14%) Multithreaded Programming
9 19 (54.29%) ION Trading
10 16 (45.71%) Banking
11 13 (37.14%) ION MarketView
12 12 (34.29%) Degree
13 11 (31.43%) Computer Science
14 10 (28.57%) Investment Banking
14 10 (28.57%) C#
14 10 (28.57%) SQL
15 9 (25.71%) TIBCO
16 8 (22.86%) Fixed Income
17 7 (20.00%) Mathematics
17 7 (20.00%) Front Office
17 7 (20.00%) Oracle
18 6 (17.14%) Windows
18 6 (17.14%) OpenGL
18 6 (17.14%) Derivative
18 6 (17.14%) Android
18 6 (17.14%) Apple iOS
18 6 (17.14%) iOS SDK

JNI
Top Related 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 4 (11.43%) WebLogic
1 4 (11.43%) WebSphere
2 3 (8.57%) Apache
2 3 (8.57%) DataSynapse
2 3 (8.57%) Oracle Coherence
Business Applications
1 13 (37.14%) ION MarketView
2 4 (11.43%) Murex MxG2000
Cloud Services
1 3 (8.57%) Amazon AWS
1 3 (8.57%) Google Cloud Platform
Database & Business Intelligence
1 4 (11.43%) KDB
2 1 (2.86%) NoSQL
Development Applications
1 6 (17.14%) Android Studio
1 6 (17.14%) Gradle
2 4 (11.43%) CocoaPods
2 4 (11.43%) Xcode
3 1 (2.86%) Maven
General
1 20 (57.14%) Finance
2 16 (45.71%) Banking
3 10 (28.57%) Investment Banking
4 7 (20.00%) Front Office
5 1 (2.86%) Financial Institution
5 1 (2.86%) Games
5 1 (2.86%) Telecoms
Job Titles
1 33 (94.29%) Developer
2 27 (77.14%) Java Developer
3 16 (45.71%) Electronic Trading Developer
3 16 (45.71%) Electronic Trading Java Developer
4 5 (14.29%) Low Latency Java Developer
5 4 (11.43%) Mobile Developer
6 3 (8.57%) C++ Developer
6 3 (8.57%) Cloud Developer
7 2 (5.71%) Android Developer
7 2 (5.71%) C++/Java Developer
7 2 (5.71%) Electronic Trading C++ Developer
7 2 (5.71%) iOS Android Developer
7 2 (5.71%) iOS Developer
7 2 (5.71%) Senior Developer
7 2 (5.71%) Senior Java Developer
8 1 (2.86%) Analyst
8 1 (2.86%) C/C++ Developer
8 1 (2.86%) C++ Quantitative Developer
8 1 (2.86%) Java Quantitative Developer
8 1 (2.86%) Python Developer
Libraries, Frameworks & Software Standards
1 6 (17.14%) Android SDK
1 6 (17.14%) iOS SDK
1 6 (17.14%) OpenGL
2 5 (14.29%) Spring
3 4 (11.43%) FIX Protocol
3 4 (11.43%) Hibernate
3 4 (11.43%) Java EE
3 4 (11.43%) Java SE
3 4 (11.43%) JMS
3 4 (11.43%) Murex Flex
3 4 (11.43%) Rendezvous
3 4 (11.43%) Spring Integration
3 4 (11.43%) XML
3 4 (11.43%) XSLT
4 3 (8.57%) Guava
4 3 (8.57%) J2SE
4 3 (8.57%) Middleware
5 1 (2.86%) Android NDK
5 1 (2.86%) Unity (Game Engine)
Miscellaneous
1 24 (68.57%) Foreign Exchange (FX)
2 21 (60.00%) Equities
3 11 (31.43%) Computer Science
4 8 (22.86%) Fixed Income
5 6 (17.14%) Derivative
6 5 (14.29%) Algorithms
7 4 (11.43%) Augmented Reality
8 3 (8.57%) Fintech
9 1 (2.86%) CUDA
9 1 (2.86%) Digital Media
9 1 (2.86%) Market Risk
Operating Systems
1 6 (17.14%) Android
1 6 (17.14%) Apple iOS
1 6 (17.14%) Windows
2 4 (11.43%) Linux
2 4 (11.43%) Unix
Processes & Methodologies
1 25 (71.43%) Electronic Trading
2 22 (62.86%) Multithreading
3 21 (60.00%) Low Latency
3 21 (60.00%) SDLC
4 20 (57.14%) Multithreaded Programming
5 7 (20.00%) Mathematics
6 4 (11.43%) Algorithmic Trading
6 4 (11.43%) Android Development
6 4 (11.43%) Cross-Platform Development
6 4 (11.43%) High-Frequency Trading
6 4 (11.43%) iOS Development
6 4 (11.43%) Mobile Development
6 4 (11.43%) Risk Management
7 3 (8.57%) Data Management
8 2 (5.71%) Agile Software Development
8 2 (5.71%) OO
9 1 (2.86%) Business Transformation
9 1 (2.86%) Parallel Programming
9 1 (2.86%) Refactoring
Programming Languages
1 35 (100.00%) C++
2 30 (85.71%) Java
3 26 (74.29%) C
4 10 (28.57%) C#
4 10 (28.57%) SQL
5 4 (11.43%) Python
6 1 (2.86%) Objective-C
Qualifications
1 12 (34.29%) Degree
Quality Assurance & Compliance
1 4 (11.43%) MiFID
2 1 (2.86%) QA
Vendors
1 19 (54.29%) ION Trading
2 9 (25.71%) TIBCO
3 7 (20.00%) Oracle
4 4 (11.43%) Adobe
4 4 (11.43%) Bloomberg
4 4 (11.43%) Murex
4 4 (11.43%) Reuters
4 4 (11.43%) Sybase
5 3 (8.57%) Google