The following table provides summary statistics for contract job vacancies 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 27 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)
UK
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 563 650 632
Rank change year-on-year +87 -18  
Contract jobs citing JNI 47 4 10
As % of all contract IT jobs advertised in the UK 0.100% 0.007% 0.018%
As % of the Libraries, Frameworks & Software Standards category 0.31% 0.026% 0.066%
Number of daily rates quoted 42 4 4
Median daily rate £625 £538 £500
Median daily rate % change year-on-year +16.27% +7.50%  
90% offered a daily rate of more than £528 £490 £313
10% offered a daily rate of more than £675 £620 £635
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 with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
UK
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 15079 15377 15197
As % of all contract IT job vacancies advertised in the UK 32.00% 28.48% 27.55%
Number of daily rates quoted 10419 10829 10153
Median daily rate £430 £420 £388
Median daily rate % change year-on-year +2.38% +8.38%  
90% offered a daily rate of more than £315 £300 £285
10% offered a daily rate of more than £580 £550 £550
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 197 188 210
Median hourly rate £42.50 £36.00 £37.80
Median hourly rate % change year-on-year +18.05% -4.76%  
90% offered a hourly rate of more than £21.00 £18.80 £18.00
10% offered a hourly rate of more than £55.00 £50.00 £55.00
UK excluding London median hourly rate £42.50 £36.00 £40.00
% change year-on-year +18.05% -10.00%  

JNI
Job Vacancy Trend

The job posting trend of jobs advertised 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 the UK

JNI
Contractor Daily Rate Trend

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

Contractor daily rate trend for JNI in the UK

JNI
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing JNI over the 3 months to 27 June 2017.

Contractor daily rate histogram for JNI in the UK

JNI
Contractor Hourly Rate Trend

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

Contractor hourly rate trend for JNI in the UK

JNI
Top 9 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing JNI within the UK over the 3 months to 27 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +65 47 £625 +16.27% 1
London +42 43 £625 +16.27% 1
Yorkshire - 3 £363 -
West Yorkshire - 3 £363 -
Halifax - 2 - -
Leeds - 1 £363 -
Cheshire - 1 £400 -
North West - 1 £400 -
Warrington - 1 £400 -

For the 6 months to 27 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 with a requirement for JNI.

1 74 (100.00%) Java
2 64 (86.49%) C++
3 59 (79.73%) Electronic Trading
4 52 (70.27%) Foreign Exchange (FX)
5 50 (67.57%) Low Latency
6 49 (66.22%) Greenfield Project
7 48 (64.86%) SDLC
7 48 (64.86%) Multithreading
7 48 (64.86%) Equities
8 45 (60.81%) ION Trading
9 41 (55.41%) Finance
10 35 (47.30%) Banking
10 35 (47.30%) C
11 33 (44.59%) Multithreaded Programming
12 27 (36.49%) SQL
13 26 (35.14%) Investment Banking
14 25 (33.78%) ION MarketView
15 23 (31.08%) Front Office
16 17 (22.97%) C#
16 17 (22.97%) Degree
17 15 (20.27%) Mathematics
17 15 (20.27%) Computer Science
18 12 (16.22%) TIBCO
19 11 (14.86%) Oracle
20 10 (13.51%) Fixed Income
21 8 (10.81%) Windows
21 8 (10.81%) Derivative
22 7 (9.46%) WebSphere
22 7 (9.46%) Oracle Coherence
22 7 (9.46%) JMS

JNI
Co-occurring IT Skills 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 (9.46%) Oracle Coherence
1 7 (9.46%) WebSphere
2 4 (5.41%) DataSynapse
2 4 (5.41%) WebLogic
3 2 (2.70%) Apache
3 2 (2.70%) WebSphere Portal
Business Applications
1 25 (33.78%) ION MarketView
2 4 (5.41%) Murex MxG2000
3 1 (1.35%) RMDS
Cloud Services
1 4 (5.41%) Amazon AWS
1 4 (5.41%) Google Cloud Platform
2 2 (2.70%) IaaS
2 2 (2.70%) PaaS
3 1 (1.35%) Google Play
Database & Business Intelligence
1 6 (8.11%) KDB
2 3 (4.05%) Apache Cassandra
3 2 (2.70%) Redis
4 1 (1.35%) Big Data
Development Applications
1 3 (4.05%) Eclipse
1 3 (4.05%) NetBeans
2 1 (1.35%) Git (software)
2 1 (1.35%) JIRA
General
1 41 (55.41%) Finance
2 35 (47.30%) Banking
3 26 (35.14%) Investment Banking
4 23 (31.08%) Front Office
5 3 (4.05%) Financial Institution
6 2 (2.70%) Telecoms
Job Titles
1 72 (97.30%) Developer
2 69 (93.24%) Java Developer
3 41 (55.41%) Electronic Trading Developer
3 41 (55.41%) Electronic Trading Java Developer
4 34 (45.95%) Low Latency Java Developer
5 6 (8.11%) Java Quantitative Developer
5 6 (8.11%) Quantitative Developer
6 4 (5.41%) C++ Developer
6 4 (5.41%) C++/Java Developer
6 4 (5.41%) Cloud Developer
6 4 (5.41%) Core Java Developer
7 3 (4.05%) C++ Quantitative Developer
8 2 (2.70%) Analyst
8 2 (2.70%) Electronic Trading C++ Developer
8 2 (2.70%) Java WebSphere Developer
8 2 (2.70%) Portal Developer
8 2 (2.70%) Senior Developer
8 2 (2.70%) Senior Java Developer
8 2 (2.70%) WebSphere Developer
8 2 (2.70%) WebSphere Portal Developer
Libraries, Frameworks & Software Standards
1 7 (9.46%) JMS
1 7 (9.46%) Spring
2 6 (8.11%) FIX Protocol
2 6 (8.11%) Middleware
2 6 (8.11%) Rendezvous
3 4 (5.41%) Hibernate
3 4 (5.41%) J2SE
3 4 (5.41%) Java EE
3 4 (5.41%) Java SE
3 4 (5.41%) Murex Flex
3 4 (5.41%) Spring Integration
3 4 (5.41%) XML
3 4 (5.41%) XSLT
4 3 (4.05%) J2EE
4 3 (4.05%) JDBC
4 3 (4.05%) JSP
4 3 (4.05%) REST
4 3 (4.05%) Servlets
5 2 (2.70%) Guava
5 2 (2.70%) Ultra Messaging
Miscellaneous
1 52 (70.27%) Foreign Exchange (FX)
2 49 (66.22%) Greenfield Project
3 48 (64.86%) Equities
4 15 (20.27%) Computer Science
5 10 (13.51%) Fixed Income
6 8 (10.81%) Derivative
7 4 (5.41%) Fintech
8 3 (4.05%) Data Structures
9 2 (2.70%) Algorithms
9 2 (2.70%) Digital Media
9 2 (2.70%) Equity Derivative
9 2 (2.70%) Grid Computing
10 1 (1.35%) Analytical Skills
10 1 (1.35%) Augmented Reality
10 1 (1.35%) Credit Risk
10 1 (1.35%) Market Risk
Operating Systems
1 8 (10.81%) Windows
2 6 (8.11%) Linux
3 4 (5.41%) Unix
4 1 (1.35%) Android
Processes & Methodologies
1 59 (79.73%) Electronic Trading
2 50 (67.57%) Low Latency
3 48 (64.86%) Multithreading
3 48 (64.86%) SDLC
4 33 (44.59%) Multithreaded Programming
5 15 (20.27%) Mathematics
6 6 (8.11%) OO
7 5 (6.76%) OOP
7 5 (6.76%) Physics
7 5 (6.76%) Quantitative Research
7 5 (6.76%) Release Management
7 5 (6.76%) Risk Management
7 5 (6.76%) Test Strategy
8 4 (5.41%) Algorithmic Trading
8 4 (5.41%) Data Management
8 4 (5.41%) High-Frequency Trading
9 3 (4.05%) Agile Software Development
9 3 (4.05%) Business Transformation
9 3 (4.05%) Continuous Delivery
9 3 (4.05%) Open Source
Programming Languages
1 74 (100.00%) Java
2 64 (86.49%) C++
3 35 (47.30%) C
4 27 (36.49%) SQL
5 17 (22.97%) C#
Qualifications
1 17 (22.97%) Degree
2 5 (6.76%) Numerate Degree
2 5 (6.76%) PhD
3 3 (4.05%) Sun Certification
Quality Assurance & Compliance
1 4 (5.41%) MiFID
2 2 (2.70%) QA
3 1 (1.35%) Data Quality
System Software
1 3 (4.05%) Platform Symphony
Vendors
1 45 (60.81%) ION Trading
2 12 (16.22%) TIBCO
3 11 (14.86%) Oracle
4 5 (6.76%) Google
5 4 (5.41%) Adobe
5 4 (5.41%) Bloomberg
5 4 (5.41%) Murex
5 4 (5.41%) Reuters
5 4 (5.41%) Sybase
6 3 (4.05%) Sun
7 2 (2.70%) IBM
8 1 (1.35%) Azul