Period
to 24 April 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 24 April 2018 with a comparison to the same period in the previous 2 years.

Portable Operating System Interface (POSIX)
UK
6 months to
24 Apr 2018
Same period 2017 Same period 2016
Rank 1154 1119 1207
Rank change year-on-year -35 +88 +79
Permanent jobs citing POSIX 29 57 62
As % of all permanent IT jobs advertised in the UK 0.016% 0.034% 0.030%
As % of the Libraries, Frameworks & Software Standards category 0.040% 0.083% 0.079%
Number of salaries quoted 17 37 47
UK median annual salary £50,000 £41,500 £52,500
Median salary % change year-on-year +20.48% -20.95% -4.55%
10th Percentile £35,000 £29,000 £38,750
90th Percentile £87,250 £69,750 £81,000
UK excluding London median annual salary £47,500 £37,500 £47,500
% change year-on-year +26.67% -21.05% -

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 72,611 68,471 78,515
As % of all permanent IT jobs advertised in the UK 40.97% 40.30% 38.61%
Number of salaries quoted 61,250 58,574 67,625
UK median annual salary £50,000 £47,500 £47,500
Median salary % change year-on-year +5.26% - +5.56%
10th Percentile £30,500 £28,987 £28,500
90th Percentile £80,000 £76,250 £75,000
UK excluding London median annual salary £44,000 £42,500 £41,500
% change year-on-year +3.53% +2.41% +3.75%

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 24 April 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 24 April 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 -56 29 £50,000 +22.70% 6
UK excluding London -35 20 £47,500 +26.67% 3
South East -9 11 £50,000 +20.48% 1
East of England -26 9 £35,000 +16.67%
London -45 9 £117,500 +88.00% 4

For the 6 months to 24 April 2018, IT jobs citing POSIX also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads with a requirement for POSIX.

1 17 (58.62%) Linux
2 16 (55.17%) C
3 15 (51.72%) C++
4 12 (41.38%) Multithreading
5 11 (37.93%) Intrusion Detection
5 11 (37.93%) FTP
5 11 (37.93%) HTTP
5 11 (37.93%) TCP/IP
5 11 (37.93%) DNS
5 11 (37.93%) Firewall
6 10 (34.48%) Windows
6 10 (34.48%) Software Engineering
7 9 (31.03%) SSH
7 9 (31.03%) iSCSI
7 9 (31.03%) NAS
7 9 (31.03%) Bash Shell
7 9 (31.03%) F5
7 9 (31.03%) Active Directory
7 9 (31.03%) Juniper
7 9 (31.03%) SAN
7 9 (31.03%) NFS
7 9 (31.03%) Cisco
7 9 (31.03%) Intranet
7 9 (31.03%) Internet
7 9 (31.03%) MPLS
7 9 (31.03%) Finance
7 9 (31.03%) Linux Command Line
8 8 (27.59%) Java
8 8 (27.59%) Computer Science
8 8 (27.59%) Degree

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 2 (6.90%) CMS
Cloud Services
1 3 (10.34%) SaaS
Communications & Networking
1 11 (37.93%) DNS
1 11 (37.93%) Firewall
1 11 (37.93%) FTP
1 11 (37.93%) HTTP
1 11 (37.93%) Intrusion Detection
1 11 (37.93%) TCP/IP
2 9 (31.03%) Internet
2 9 (31.03%) Intranet
2 9 (31.03%) iSCSI
2 9 (31.03%) MPLS
2 9 (31.03%) NAS
2 9 (31.03%) SAN
2 9 (31.03%) SSH
3 5 (17.24%) Network Security
3 5 (17.24%) WAN
4 3 (10.34%) BIG-IP
4 3 (10.34%) Cisco ASA
4 3 (10.34%) Cisco IOS
4 3 (10.34%) DVB
4 3 (10.34%) Junos
Database & Business Intelligence
1 7 (24.14%) Blockchain
2 5 (17.24%) PostgreSQL
2 5 (17.24%) Relational Database
3 3 (10.34%) RDBMS
3 3 (10.34%) SQL Server
4 2 (6.90%) MySQL
4 2 (6.90%) Oracle Database
4 2 (6.90%) Oracle Database 11g
Development Applications
1 5 (17.24%) CMake
2 3 (10.34%) CppUnit
2 3 (10.34%) JIRA
2 3 (10.34%) Subversion
General
1 9 (31.03%) Finance
2 3 (10.34%) Electronics
2 3 (10.34%) Manufacturing
2 3 (10.34%) Marketing
2 3 (10.34%) Telecoms
3 2 (6.90%) Back Office
3 2 (6.90%) Military
Job Titles
1 10 (34.48%) C++ Developer
1 10 (34.48%) Developer
2 8 (27.59%) Administrator
3 7 (24.14%) Network Administrator
3 7 (24.14%) Software Engineer
4 3 (10.34%) Cisco Administrator
4 3 (10.34%) Cisco Network Administrator
4 3 (10.34%) Firewall Administrator
4 3 (10.34%) Linux Engineer
4 3 (10.34%) Network Engineer
4 3 (10.34%) Senior Cisco Administrator
4 3 (10.34%) Senior Network Administrator
4 3 (10.34%) Senior Network Engineer
4 3 (10.34%) Systems Administrator
5 2 (6.90%) Blockchain Developer
5 2 (6.90%) C Software Engineer
5 2 (6.90%) C/C++ Software Engineer
5 2 (6.90%) Embedded Engineer
5 2 (6.90%) Principal Engineer
5 2 (6.90%) Principal Software Engineer
Libraries, Frameworks & Software Standards
1 7 (24.14%) Pthreads
2 4 (13.79%) Boost C++ Libraries
3 3 (10.34%) JDBC
3 3 (10.34%) JNI
3 3 (10.34%) ODBC
3 3 (10.34%) STL
4 2 (6.90%) FIX Protocol
4 2 (6.90%) J2EE
4 2 (6.90%) JSON
4 2 (6.90%) Kafka
4 2 (6.90%) Protocol Buffers
4 2 (6.90%) RESTful
4 2 (6.90%) WebSockets
4 2 (6.90%) ZeroMQ
Miscellaneous
1 9 (31.03%) Linux Command Line
2 8 (27.59%) Computer Science
3 6 (20.69%) Self-Motivation
4 5 (17.24%) Bitcoin
4 5 (17.24%) Virtual Team
5 3 (10.34%) Digital TV
6 2 (6.90%) Data Structures
6 2 (6.90%) Enterprise Software
6 2 (6.90%) Hedge funds
6 2 (6.90%) Management Information System
6 2 (6.90%) Smartphone
7 1 (3.45%) Algorithms
7 1 (3.45%) Embedded Systems
Operating Systems
1 17 (58.62%) Linux
2 10 (34.48%) Windows
3 3 (10.34%) AIX
3 3 (10.34%) Solaris
3 3 (10.34%) Unix
4 2 (6.90%) CentOS
4 2 (6.90%) Fedora
4 2 (6.90%) Red Hat Enterprise Linux
5 1 (3.45%) Embedded Linux
5 1 (3.45%) VxWorks
Processes & Methodologies
1 12 (41.38%) Multithreading
2 10 (34.48%) Software Engineering
3 7 (24.14%) Capacity Planning
3 7 (24.14%) Disaster Recovery
4 5 (17.24%) Agile Software Development
4 5 (17.24%) Cryptocurrency
4 5 (17.24%) Cryptography
4 5 (17.24%) Functional Testing
4 5 (17.24%) Multithreaded Programming
4 5 (17.24%) OO
4 5 (17.24%) Performance Testing
4 5 (17.24%) Problem-Solving
4 5 (17.24%) Root Cause Analysis
4 5 (17.24%) Test Automation
5 3 (10.34%) Collaborative Working
5 3 (10.34%) Creative Thinking
5 3 (10.34%) Digital Marketing
5 3 (10.34%) Innovative Thinking
5 3 (10.34%) Programme Management
5 3 (10.34%) SDLC
Programming Languages
1 16 (55.17%) C
2 15 (51.72%) C++
3 9 (31.03%) Bash Shell
4 8 (27.59%) Java
5 6 (20.69%) Python
6 3 (10.34%) SQL
7 2 (6.90%) Shell Script
8 1 (3.45%) Embedded C
8 1 (3.45%) Embedded C++
8 1 (3.45%) Perl
Qualifications
1 8 (27.59%) Degree
2 6 (20.69%) Computer Science Degree
3 1 (3.45%) SC Cleared
3 1 (3.45%) Security Cleared
Quality Assurance & Compliance
1 2 (6.90%) QA
1 2 (6.90%) SLA
System Software
1 9 (31.03%) Active Directory
1 9 (31.03%) NFS
2 1 (3.45%) Firmware
Vendors
1 9 (31.03%) Cisco
1 9 (31.03%) F5
1 9 (31.03%) Juniper
2 6 (20.69%) Oracle
3 3 (10.34%) SAP
4 2 (6.90%) Red Hat
4 2 (6.90%) Xerox
5 1 (3.45%) QNX