Portable Operating System Interface (POSIX)
UK

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 4 March 2024 with a comparison to the same period in the previous 2 years.

6 months to
4 Mar 2024
Same period 2023 Same period 2022
Rank 822 1012 1148
Rank change year-on-year +190 +136 -307
Permanent jobs citing POSIX 16 21 4
As % of all permanent jobs advertised in the UK 0.020% 0.019% 0.003%
As % of the Libraries, Frameworks & Software Standards category 0.085% 0.060% 0.007%
Number of salaries quoted 15 0 1
10th Percentile £49,750 - -
25th Percentile - - £32,500
Median annual salary (50th Percentile) £50,000 - £35,000
Median % change year-on-year - - -46.15%
75th Percentile - - £37,500
90th Percentile £60,250 - -
UK excluding London median annual salary £50,000 - £35,000
% change year-on-year - - -41.67%

All Software Libraries and Frameworks
UK

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.

Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 18,929 34,849 55,080
As % of all permanent jobs advertised in the UK 23.14% 31.34% 38.75%
Number of salaries quoted 14,620 21,175 31,093
10th Percentile £37,500 £40,371 £37,500
25th Percentile £46,250 £50,000 £46,750
Median annual salary (50th Percentile) £60,000 £67,500 £62,500
Median % change year-on-year -11.11% +8.00% +13.64%
75th Percentile £80,000 £87,500 £82,500
90th Percentile £100,000 £105,000 £98,750
UK excluding London median annual salary £55,000 £57,500 £55,000
% change year-on-year -4.35% +4.55% +10.00%

POSIX
Job Vacancy Trend

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

Job vacancy trend for POSIX in the UK

POSIX
Salary Trend

3-month moving average salary quoted in jobs citing POSIX.

Salary trend for POSIX in the UK

POSIX
Top 8 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 4 March 2024. 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
Jobs
England +185 16 £50,000 - 2
UK excluding London +88 16 £50,000 - 3
Midlands +69 10 £50,000 - 2
West Midlands +59 10 £50,000 - 2
North of England +96 3 £56,500 -
North West +44 3 £56,500 -
South West +28 3 £50,000 -
Work from Home +135 1 - -

POSIX
Co-occurring Skills and Capabilities by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same employment type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Application Platforms
1 10 (62.50%) nginx
Applications
1 2 (12.50%) GNU Octave
1 2 (12.50%) Simulink
Communications & Networking
1 10 (62.50%) Firewall
2 2 (12.50%) Ethernet
2 2 (12.50%) Wireless
Database & Business Intelligence
1 10 (62.50%) MySQL
1 10 (62.50%) PostgreSQL
Development Applications
1 16 (100.00%) Git
2 14 (87.50%) Subversion
3 10 (62.50%) GNU Toolchain
4 4 (25.00%) Eclipse
4 4 (25.00%) JIRA
4 4 (25.00%) Visual Studio
5 2 (12.50%) PetaLinux
General
1 2 (12.50%) Manufacturing
2 1 (6.25%) Finance
2 1 (6.25%) Inclusion and Diversity
Job Titles
1 10 (62.50%) Developer
1 10 (62.50%) Linux Developer
2 5 (31.25%) Software Engineer
3 2 (12.50%) Embedded Engineer
3 2 (12.50%) Embedded Software Engineer
Libraries, Frameworks & Software Standards
1 10 (62.50%) Node.js
2 2 (12.50%) Yocto
Miscellaneous
1 10 (62.50%) Embedded Systems
1 10 (62.50%) Linux Command Line
2 2 (12.50%) Algorithms
2 2 (12.50%) FPGA
2 2 (12.50%) Management Information System
2 2 (12.50%) VHDL
3 1 (6.25%) Cyber Defence
3 1 (6.25%) Cyberattack
3 1 (6.25%) IoT
Operating Systems
1 16 (100.00%) Linux
2 10 (62.50%) Unix
3 4 (25.00%) FreeBSD
3 4 (25.00%) Mac OS X
3 4 (25.00%) Windows
4 3 (18.75%) Android
5 2 (12.50%) FreeRTOS
6 1 (6.25%) Apple iOS
Processes & Methodologies
1 10 (62.50%) Open Source
2 6 (37.50%) Software Engineering
3 4 (25.00%) Continuous Integration
3 4 (25.00%) Customer Requirements
3 4 (25.00%) TDD
3 4 (25.00%) Test Scripting
3 4 (25.00%) Unit Testing
4 2 (12.50%) Configuration Management
4 2 (12.50%) Digital Signal Processing
4 2 (12.50%) Mathematics
4 2 (12.50%) Signal Processing
5 1 (6.25%) Cyber Threat Intelligence
5 1 (6.25%) Mobile Development
5 1 (6.25%) Problem-Solving
5 1 (6.25%) Reverse Engineering
5 1 (6.25%) Threat Intelligence
Programming Languages
1 15 (93.75%) C++
2 12 (75.00%) C
3 10 (62.50%) Bash
4 6 (37.50%) Python
5 4 (25.00%) C#
5 4 (25.00%) Java
5 4 (25.00%) JavaScript
5 4 (25.00%) Perl
5 4 (25.00%) PowerShell
6 2 (12.50%) MATLAB
6 2 (12.50%) Shell Script
Qualifications
1 6 (37.50%) Security Cleared
2 5 (31.25%) SC Cleared
3 2 (12.50%) Degree
System Software
1 3 (18.75%) Firmware
2 2 (12.50%) Embedded Firmware
Vendors
1 2 (12.50%) Xilinx