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 26 June 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.

Java Native Interface (JNI)
England / London
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 382 414 439
Rank change year-on-year +32 +25  
Contract jobs citing JNI 42 4 3
As % of all contract IT jobs advertised in London 0.20% 0.019% 0.013%
As % of the Libraries, Frameworks & Software Standards category 0.57% 0.058% 0.041%
Number of daily rates quoted 39 4 3
Median daily rate £625 £538 £600
Median daily rate % change year-on-year +16.27% -10.41%  
90% offered a daily rate of more than £550 £490 £440
10% offered a daily rate of more than £675 £620 £640
UK excluding London median daily rate £381 - £275
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 7432 6937 7308
As % of all contract IT job vacancies advertised in London 35.80% 32.45% 31.31%
Number of daily rates quoted 5525 5323 5305
Median daily rate £476 £450 £425
Median daily rate % change year-on-year +5.66% +5.88%  
90% offered a daily rate of more than £350 £325 £310
10% offered a daily rate of more than £600 £600 £575
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 50 25 49
Median hourly rate £35.00 £40.00 £22.50
Median hourly rate % change year-on-year -12.50% +77.77%  
90% offered a hourly rate of more than £16.00 £20.00 £16.09
10% offered a hourly rate of more than £55.00 £190.00 £60.00
UK excluding London median hourly rate £42.50 £36.00 £40.00
% change year-on-year +18.05% -10.00%  

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 26 June 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 contractor hourly rates quoted in IT jobs citing JNI in London.

Contractor hourly rate trend for JNI in London

For the 6 months to 26 June 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 68 (100.00%) Java
2 63 (92.65%) C++
3 58 (85.29%) Electronic Trading
4 51 (75.00%) Foreign Exchange (FX)
5 49 (72.06%) Low Latency
6 48 (70.59%) Greenfield Project
7 47 (69.12%) SDLC
7 47 (69.12%) Multithreading
7 47 (69.12%) Equities
8 44 (64.71%) ION Trading
9 41 (60.29%) Finance
10 34 (50.00%) Banking
10 34 (50.00%) C
11 32 (47.06%) Multithreaded Programming
12 25 (36.76%) ION MarketView
12 25 (36.76%) Investment Banking
13 23 (33.82%) SQL
13 23 (33.82%) Front Office
14 17 (25.00%) C#
14 17 (25.00%) Degree
15 15 (22.06%) Computer Science
16 13 (19.12%) Mathematics
17 12 (17.65%) TIBCO
18 11 (16.18%) Oracle
19 10 (14.71%) Fixed Income
20 8 (11.76%) Derivative
20 8 (11.76%) Windows
21 7 (10.29%) Spring
21 7 (10.29%) Oracle Coherence
22 6 (8.82%) KDB

JNI
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:

Application Platforms
1 7 (10.29%) Oracle Coherence
2 4 (5.88%) DataSynapse
2 4 (5.88%) WebLogic
2 4 (5.88%) WebSphere
3 2 (2.94%) Apache
Business Applications
1 25 (36.76%) ION MarketView
2 4 (5.88%) Murex MxG2000
3 1 (1.47%) RMDS
Cloud Services
1 4 (5.88%) Amazon AWS
1 4 (5.88%) Google Cloud Platform
2 2 (2.94%) IaaS
2 2 (2.94%) PaaS
3 1 (1.47%) Google Play
Database & Business Intelligence
1 6 (8.82%) KDB
2 3 (4.41%) Apache Cassandra
3 2 (2.94%) Redis
4 1 (1.47%) Big Data
Development Applications
1 1 (1.47%) Git (software)
1 1 (1.47%) JIRA
General
1 41 (60.29%) Finance
2 34 (50.00%) Banking
3 25 (36.76%) Investment Banking
4 23 (33.82%) Front Office
5 3 (4.41%) Financial Institution
6 2 (2.94%) Telecoms
Job Titles
1 67 (98.53%) Developer
2 64 (94.12%) Java Developer
3 40 (58.82%) Electronic Trading Developer
3 40 (58.82%) Electronic Trading Java Developer
4 33 (48.53%) Low Latency Java Developer
5 6 (8.82%) Java Quantitative Developer
5 6 (8.82%) Quantitative Developer
6 4 (5.88%) C++ Developer
6 4 (5.88%) C++/Java Developer
6 4 (5.88%) Cloud Developer
6 4 (5.88%) Core Java Developer
7 3 (4.41%) C++ Quantitative Developer
8 2 (2.94%) Analyst
8 2 (2.94%) Electronic Trading C++ Developer
8 2 (2.94%) Senior Developer
8 2 (2.94%) Senior Java Developer
9 1 (1.47%) Analyst Developer
9 1 (1.47%) Banking Analyst
9 1 (1.47%) Linux Engineer
9 1 (1.47%) Oracle Developer
Libraries, Frameworks & Software Standards
1 7 (10.29%) Spring
2 6 (8.82%) FIX Protocol
2 6 (8.82%) Middleware
2 6 (8.82%) Rendezvous
3 4 (5.88%) Hibernate
3 4 (5.88%) J2SE
3 4 (5.88%) Java EE
3 4 (5.88%) Java SE
3 4 (5.88%) JMS
3 4 (5.88%) Murex Flex
3 4 (5.88%) Spring Integration
3 4 (5.88%) XML
3 4 (5.88%) XSLT
4 3 (4.41%) REST
5 2 (2.94%) Guava
5 2 (2.94%) Ultra Messaging
6 1 (1.47%) Android NDK
6 1 (1.47%) OpenGL
Miscellaneous
1 51 (75.00%) Foreign Exchange (FX)
2 48 (70.59%) Greenfield Project
3 47 (69.12%) Equities
4 15 (22.06%) Computer Science
5 10 (14.71%) Fixed Income
6 8 (11.76%) Derivative
7 4 (5.88%) Fintech
8 3 (4.41%) Data Structures
9 2 (2.94%) Algorithms
9 2 (2.94%) Digital Media
9 2 (2.94%) Equity Derivative
9 2 (2.94%) Grid Computing
10 1 (1.47%) Analytical Skills
10 1 (1.47%) Augmented Reality
10 1 (1.47%) Credit Risk
10 1 (1.47%) Market Risk
Operating Systems
1 8 (11.76%) Windows
2 6 (8.82%) Linux
3 4 (5.88%) Unix
4 1 (1.47%) Android
Processes & Methodologies
1 58 (85.29%) Electronic Trading
2 49 (72.06%) Low Latency
3 47 (69.12%) Multithreading
3 47 (69.12%) SDLC
4 32 (47.06%) Multithreaded Programming
5 13 (19.12%) Mathematics
6 6 (8.82%) OO
7 5 (7.35%) OOP
7 5 (7.35%) Physics
7 5 (7.35%) Quantitative Research
7 5 (7.35%) Release Management
7 5 (7.35%) Risk Management
7 5 (7.35%) Test Strategy
8 4 (5.88%) Algorithmic Trading
8 4 (5.88%) Data Management
8 4 (5.88%) High-Frequency Trading
9 3 (4.41%) Agile Software Development
9 3 (4.41%) Business Transformation
9 3 (4.41%) Continuous Delivery
10 2 (2.94%) Parallel Programming
Programming Languages
1 68 (100.00%) Java
2 63 (92.65%) C++
3 34 (50.00%) C
4 23 (33.82%) SQL
5 17 (25.00%) C#
Qualifications
1 17 (25.00%) Degree
2 5 (7.35%) Numerate Degree
2 5 (7.35%) PhD
Quality Assurance & Compliance
1 4 (5.88%) MiFID
2 2 (2.94%) QA
3 1 (1.47%) Data Quality
System Software
1 3 (4.41%) Platform Symphony
Vendors
1 44 (64.71%) ION Trading
2 12 (17.65%) TIBCO
3 11 (16.18%) Oracle
4 5 (7.35%) Google
5 4 (5.88%) Adobe
5 4 (5.88%) Bloomberg
5 4 (5.88%) Murex
5 4 (5.88%) Reuters
5 4 (5.88%) Sybase
6 1 (1.47%) Azul