Period
to 20 January 2018

The following table provides summary statistics for permanent job vacancies with a requirement for POSIX skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited POSIX over the 6 months to 20 January 2018 with a comparison to the same period in the previous 2 years.

Portable Operating System Interface (POSIX)
UK
6 months to
20 Jan 2018
Same period 2017 Same period 2016
Rank 1107 1161 1235
Rank change year-on-year +54 +74 +36
Permanent jobs citing POSIX 56 19 57
As % of all permanent IT jobs advertised in the UK 0.032% 0.011% 0.027%
As % of the Libraries, Frameworks & Software Standards category 0.080% 0.027% 0.071%
Number of salaries quoted 32 7 37
UK median annual salary £52,500 £42,500 £60,000
Median salary % change year-on-year +23.53% -29.17% +41.18%
10th Percentile £35,000 £32,600 £45,250
90th Percentile £67,250 £71,250 £86,250
UK excluding London median annual salary £52,500 £42,500 £57,500
% change year-on-year +23.53% -26.09% +35.29%

POSIX is in the Software Libraries and Frameworks category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies with a requirement for technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
UK
Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 70,367 69,646 79,725
As % of all permanent IT jobs advertised in the UK 40.65% 39.34% 38.21%
Number of salaries quoted 59,005 60,173 68,438
UK median annual salary £50,000 £47,500 £45,000
Median salary % change year-on-year +5.26% +5.56% -
10th Percentile £30,000 £28,750 £28,000
90th Percentile £77,500 £77,500 £75,000
UK excluding London median annual salary £42,500 £42,500 £40,000
% change year-on-year - +6.25% -

POSIX
Job Vacancy Trend

Job postings citing POSIX as a percentage of all IT jobs advertised.

Job vacancy trend for POSIX in the UK

POSIX
Salary Trend

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

Salary trend for POSIX in the UK

POSIX
Salary Histogram

The salary distribution of IT jobs citing POSIX over the 6 months to 20 January 2018.

Salary histogram for POSIX in the UK

POSIX
Top 5 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing POSIX within the UK over the 6 months to 20 January 2018. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +51 53 £52,500 +23.53% 5
UK excluding London +53 46 £52,500 +23.53% 5
East of England +41 33 £60,000 +41.18%
South East +37 13 £50,000 -6.98% 5
London -1 7 - -

For the 6 months to 20 January 2018, IT jobs citing POSIX also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads with a requirement for POSIX.

1 37 (66.07%) C++
2 29 (51.79%) Multithreading
3 28 (50.00%) Windows
4 26 (46.43%) C
5 25 (44.64%) Software Engineering
6 22 (39.29%) Degree
6 22 (39.29%) STL
7 21 (37.50%) Boost C++ Libraries
8 20 (35.71%) Finance
8 20 (35.71%) Linux
8 20 (35.71%) OO
8 20 (35.71%) HTTP
8 20 (35.71%) TCP/IP
9 18 (32.14%) C#
10 17 (30.36%) SQL
11 16 (28.57%) Intrusion Detection
11 16 (28.57%) Firewall
11 16 (28.57%) FTP
11 16 (28.57%) Oracle
11 16 (28.57%) DNS
12 15 (26.79%) Agile Software Development
12 15 (26.79%) PostgreSQL
12 15 (26.79%) Relational Database
12 15 (26.79%) Analytical Skills
13 14 (25.00%) Qt
13 14 (25.00%) Field-Programmable Gate Array
13 14 (25.00%) OOP
14 13 (23.21%) HTTPS
14 13 (23.21%) Unix
15 12 (21.43%) Windows Embedded Compact

POSIX
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 9 (16.07%) CMS
2 3 (5.36%) JBoss
2 3 (5.36%) Jetty
2 3 (5.36%) nginx
2 3 (5.36%) Tomcat
2 3 (5.36%) WebLogic
2 3 (5.36%) WebSphere
Cloud Services
1 3 (5.36%) SaaS
Communications & Networking
1 20 (35.71%) HTTP
1 20 (35.71%) TCP/IP
2 16 (28.57%) DNS
2 16 (28.57%) Firewall
2 16 (28.57%) FTP
2 16 (28.57%) Intrusion Detection
3 13 (23.21%) HTTPS
4 12 (21.43%) WAN
5 9 (16.07%) BGP
5 9 (16.07%) DHCP
5 9 (16.07%) HSRP
5 9 (16.07%) LAN
5 9 (16.07%) OSPF
5 9 (16.07%) tcpdump
5 9 (16.07%) Telnet
5 9 (16.07%) VLAN
5 9 (16.07%) VPN
5 9 (16.07%) Wireshark
6 7 (12.50%) iSCSI
6 7 (12.50%) NAS
Database & Business Intelligence
1 15 (26.79%) PostgreSQL
1 15 (26.79%) Relational Database
2 8 (14.29%) RDBMS
2 8 (14.29%) SQL Server
3 7 (12.50%) Blockchain
3 7 (12.50%) MySQL
3 7 (12.50%) Oracle Database
3 7 (12.50%) Oracle Database 11g
4 3 (5.36%) InterSystems Cache
Development Applications
1 11 (19.64%) CppUnit
1 11 (19.64%) Subversion
2 8 (14.29%) JIRA
3 3 (5.36%) Ant
3 3 (5.36%) Eclipse
3 3 (5.36%) GDB
3 3 (5.36%) Hudson
3 3 (5.36%) Jenkins
3 3 (5.36%) JUnit
3 3 (5.36%) Maven
3 3 (5.36%) Sonatype Nexus
3 3 (5.36%) Valgrind
3 3 (5.36%) XMLSpy
4 1 (1.79%) Burp Suite
4 1 (1.79%) Metasploit
General
1 20 (35.71%) Finance
2 8 (14.29%) Back Office
2 8 (14.29%) Military
3 3 (5.36%) Banking
3 3 (5.36%) Electronics
3 3 (5.36%) Manufacturing
3 3 (5.36%) Marketing
3 3 (5.36%) Telecoms
4 1 (1.79%) Dutch Language
Job Titles
1 21 (37.50%) Software Engineer
2 17 (30.36%) C++ Software Engineer
3 15 (26.79%) Administrator
4 14 (25.00%) Network Administrator
5 13 (23.21%) Developer
6 10 (17.86%) Embedded Engineer
7 9 (16.07%) Embedded C++ Engineer
7 9 (16.07%) Embedded C++ Software Engineer
7 9 (16.07%) Embedded Software Engineer
7 9 (16.07%) IT Administrator
7 9 (16.07%) Principal Engineer
7 9 (16.07%) Principal Software Engineer
8 8 (14.29%) C++ Developer
9 7 (12.50%) Blockchain Developer
9 7 (12.50%) C Software Engineer
9 7 (12.50%) C/C++ Software Engineer
10 5 (8.93%) Software Developer
11 4 (7.14%) Senior Software Engineer
12 3 (5.36%) Cisco Administrator
12 3 (5.36%) Senior Cisco Administrator
Libraries, Frameworks & Software Standards
1 22 (39.29%) STL
2 21 (37.50%) Boost C++ Libraries
3 14 (25.00%) Qt
4 8 (14.29%) HTML
4 8 (14.29%) JDBC
4 8 (14.29%) JNI
4 8 (14.29%) ODBC
5 7 (12.50%) J2EE
5 7 (12.50%) Pthreads
5 7 (12.50%) RESTful
6 4 (7.14%) HTML5
6 4 (7.14%) REST
6 4 (7.14%) SOAP
6 4 (7.14%) XML
7 3 (5.36%) CSS
7 3 (5.36%) DOM
7 3 (5.36%) JSP
7 3 (5.36%) LEMP Stack
7 3 (5.36%) XSD
7 3 (5.36%) XSLT
Miscellaneous
1 15 (26.79%) Analytical Skills
2 14 (25.00%) Field-Programmable Gate Array
3 11 (19.64%) Computer Science
4 8 (14.29%) Management Information System
5 7 (12.50%) Enterprise Software
5 7 (12.50%) Linux Command Line
6 5 (8.93%) Algorithms
7 3 (5.36%) Digital TV
7 3 (5.36%) Fintech
8 2 (3.57%) ASIC
9 1 (1.79%) Embedded Systems
9 1 (1.79%) SCADA
9 1 (1.79%) Smartphone
Operating Systems
1 28 (50.00%) Windows
2 20 (35.71%) Linux
3 13 (23.21%) Unix
4 12 (21.43%) Windows Embedded Compact
5 8 (14.29%) AIX
5 8 (14.29%) Solaris
6 1 (1.79%) Kali Linux
Processes & Methodologies
1 29 (51.79%) Multithreading
2 25 (44.64%) Software Engineering
3 20 (35.71%) OO
4 15 (26.79%) Agile Software Development
5 14 (25.00%) OOP
6 12 (21.43%) SDLC
7 11 (19.64%) UML
8 10 (17.86%) Embedded Software Development
8 10 (17.86%) Multithreaded Programming
8 10 (17.86%) OOD
9 9 (16.07%) Data Encryption
9 9 (16.07%) Data Security
9 9 (16.07%) Network Optimisation
10 8 (14.29%) Document Management
11 7 (12.50%) API Design
11 7 (12.50%) Continuous Integration
11 7 (12.50%) Mathematics
11 7 (12.50%) Microservices
11 7 (12.50%) RUP
11 7 (12.50%) Scenario Testing
Programming Languages
1 37 (66.07%) C++
2 26 (46.43%) C
3 18 (32.14%) C#
4 17 (30.36%) SQL
5 12 (21.43%) Java
6 9 (16.07%) Embedded C++
7 7 (12.50%) Bash Shell
7 7 (12.50%) Shell Script
8 5 (8.93%) Fortran
8 5 (8.93%) PL/SQL
8 5 (8.93%) Python
9 4 (7.14%) JavaScript
9 4 (7.14%) Ruby
10 3 (5.36%) Go
10 3 (5.36%) Groovy
10 3 (5.36%) Scala
11 1 (1.79%) Objective-C
11 1 (1.79%) Perl
11 1 (1.79%) PHP
Qualifications
1 22 (39.29%) Degree
2 6 (10.71%) Master's Degree
3 5 (8.93%) Computer Science Degree
4 1 (1.79%) GIAC
4 1 (1.79%) GPEN
4 1 (1.79%) GWAPT
4 1 (1.79%) GXPN
4 1 (1.79%) OSCE
4 1 (1.79%) OSCP
Quality Assurance & Compliance
1 9 (16.07%) SLA
2 7 (12.50%) QA
System Software
1 7 (12.50%) Active Directory
1 7 (12.50%) NFS
2 1 (1.79%) Firmware
Systems Management
1 1 (1.79%) Nmap
Vendors
1 16 (28.57%) Oracle
2 9 (16.07%) Xerox
3 7 (12.50%) Cisco
3 7 (12.50%) F5
3 7 (12.50%) Juniper
4 3 (5.36%) Altova
4 3 (5.36%) Google
4 3 (5.36%) ILOG
4 3 (5.36%) SAP
4 3 (5.36%) Splunk
5 1 (1.79%) Microsoft