The following table provides summary statistics for permanent job vacancies advertised in London with a requirement for JNI skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited JNI over the 3 months to 24 June 2017 with a comparison to the same period in the previous 2 years.

Java Native Interface (JNI)
England / London
3 months to
24 Jun 2017
Same period 2016 Same period 2015
Rank 605 629 675
Rank change year-on-year +24 +46  
Permanent jobs citing JNI 11 15 4
As % of all permanent IT jobs advertised in London 0.030% 0.037% 0.009%
As % of the Libraries, Frameworks & Software Standards category 0.075% 0.093% 0.023%
Number of salaries quoted 6 15 4
Median salary £40,000 £80,000 £93,750
Median salary % change year-on-year -50.00% -14.66%  
UK excluding London median salary £40,000 £70,000 £55,000
% change year-on-year -42.85% +27.27%  

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 permanent job vacancies advertised in London with a requirement for industry standards, technical specifications and software library and framework skills.

Software Library & Framework Skills
London
Permanent job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 14635 16186 17074
As % of all permanent IT job vacancies advertised in London 40.39% 40.40% 38.02%
Number of salaries quoted 12104 14301 14709
Median salary £57,500 £55,000 £55,000
Median salary % change year-on-year +4.54% -  
90% offered a salary of more than £40,000 £38,500 £35,000
10% offered a salary of more than £80,000 £75,000 £77,500
UK excluding London median salary £42,500 £40,000 £40,000
% change year-on-year +6.25% -  

JNI
Job Vacancy Trend in London

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

Job vacancy trend for JNI in London

JNI
Salary Trend in London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing JNI in London.

Salary trend for JNI in London

JNI
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing JNI within the London region over the 3 months to 24 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
Permanent
IT Job Ads
Median Salary
Last 3 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London - 1 - -
JNI
England

For the 6 months to 24 June 2017, IT jobs citing JNI also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the London region with a requirement for JNI.

1 11 (100.00%) C
1 11 (100.00%) C++
2 10 (90.91%) Java
3 6 (54.55%) Linux
3 6 (54.55%) Android
3 6 (54.55%) Apple iOS
4 5 (45.45%) ION MarketView
4 5 (45.45%) ION Trading
4 5 (45.45%) Multithreading
4 5 (45.45%) Electronic Trading
4 5 (45.45%) Low Latency
4 5 (45.45%) SDLC
4 5 (45.45%) Foreign Exchange (FX)
4 5 (45.45%) Equities
5 4 (36.36%) Software Engineering
6 3 (27.27%) Embedded C
6 3 (27.27%) Embedded C++
6 3 (27.27%) EPoS
6 3 (27.27%) EMV
6 3 (27.27%) Smartcard
6 3 (27.27%) Bluetooth
6 3 (27.27%) Mobile Development
6 3 (27.27%) Mobile App
7 2 (18.18%) Bash Shell
7 2 (18.18%) JIRA
7 2 (18.18%) Security Cleared
7 2 (18.18%) SSH
7 2 (18.18%) Git (software)
7 2 (18.18%) Secure Coding
7 2 (18.18%) Finance

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:

Business Applications
1 5 (45.45%) ION MarketView
Communications & Networking
1 3 (27.27%) Bluetooth
2 2 (18.18%) SSH
2 2 (18.18%) VoIP
Development Applications
1 2 (18.18%) Git (software)
1 2 (18.18%) JIRA
General
1 2 (18.18%) Finance
1 2 (18.18%) Military
2 1 (9.09%) Banking
Job Titles
1 8 (72.73%) Developer
2 5 (45.45%) Electronic Trading Developer
2 5 (45.45%) Electronic Trading Java Developer
2 5 (45.45%) Java Developer
3 4 (36.36%) Software Engineer
4 3 (27.27%) Applications Developer
4 3 (27.27%) C Software Engineer
4 3 (27.27%) C++ Software Engineer
4 3 (27.27%) Embedded C Engineer
4 3 (27.27%) Embedded C Software Engineer
4 3 (27.27%) Embedded C/C++ Engineer
4 3 (27.27%) Embedded C/C++ Software Engineer
4 3 (27.27%) Embedded C++ Engineer
4 3 (27.27%) Embedded C++ Software Engineer
4 3 (27.27%) Embedded Engineer
4 3 (27.27%) Embedded Linux Software Engineer
4 3 (27.27%) Embedded Software Engineer
4 3 (27.27%) Linux Engineer
4 3 (27.27%) Mobile Applications Developer
4 3 (27.27%) Mobile Developer
Libraries, Frameworks & Software Standards
1 2 (18.18%) XMPP
2 1 (9.09%) CSS
2 1 (9.09%) HTML
2 1 (9.09%) JSON
2 1 (9.09%) XML
Miscellaneous
1 5 (45.45%) Equities
1 5 (45.45%) Foreign Exchange (FX)
2 3 (27.27%) EMV
2 3 (27.27%) EPoS
2 3 (27.27%) Mobile App
2 3 (27.27%) Smartcard
Operating Systems
1 6 (54.55%) Android
1 6 (54.55%) Apple iOS
1 6 (54.55%) Linux
2 2 (18.18%) Windows
Processes & Methodologies
1 5 (45.45%) Electronic Trading
1 5 (45.45%) Low Latency
1 5 (45.45%) Multithreading
1 5 (45.45%) SDLC
2 4 (36.36%) Software Engineering
3 3 (27.27%) Mobile Development
4 2 (18.18%) Secure Coding
5 1 (9.09%) Android Development
5 1 (9.09%) iOS Development
Programming Languages
1 11 (100.00%) C
1 11 (100.00%) C++
2 10 (90.91%) Java
3 3 (27.27%) Embedded C
3 3 (27.27%) Embedded C++
4 2 (18.18%) Bash Shell
4 2 (18.18%) Objective-C
5 1 (9.09%) Apple Swift
5 1 (9.09%) JavaScript
5 1 (9.09%) SQL
Qualifications
1 2 (18.18%) Security Cleared
Vendors
1 5 (45.45%) ION Trading
2 1 (9.09%) Google