Period
to 17 July 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 17 July 2018 with a comparison to the same period in the previous 2 years.

Portable Operating System Interface (POSIX)
UK
6 months to
17 Jul 2018
Same period 2017 Same period 2016
Rank 1148 1111 1225
Rank change year-on-year -37 +114 +36
Permanent jobs citing POSIX 34 73 70
As % of all permanent IT jobs advertised in the UK 0.019% 0.041% 0.034%
As % of the Libraries, Frameworks & Software Standards category 0.048% 0.10% 0.088%
Number of salaries quoted 21 60 62
UK median annual salary £60,000 £42,500 £47,500
Median salary % change year-on-year +41.18% -10.53% -24.00%
10th Percentile £42,500 £29,000 £36,250
90th Percentile £126,250 £68,750 £82,500
UK excluding London median annual salary £57,500 £40,000 £47,500
% change year-on-year +43.75% -15.79% -9.52%

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 71,411 72,214 79,272
As % of all permanent IT jobs advertised in the UK 40.61% 40.66% 38.99%
Number of salaries quoted 59,472 60,657 68,576
UK median annual salary £50,000 £47,500 £47,500
Median salary % change year-on-year +5.26% - +5.56%
10th Percentile £31,250 £28,750 £28,750
90th Percentile £80,000 £77,500 £75,000
UK excluding London median annual salary £45,000 £42,500 £41,500
% change year-on-year +5.88% +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 17 July 2018.

Salary histogram for POSIX in the UK

POSIX
Top 6 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 17 July 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 -19 34 £60,000 +41.18% 7
London +29 19 £117,500 +88.00% 2
UK excluding London -50 15 £57,500 +43.75% 5
South East -6 8 £55,000 +22.22% 2
East of England -26 6 £57,500 +79.69% 3
South West +5 1 - -

For the 6 months to 17 July 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 27 (79.41%) C++
2 26 (76.47%) Linux
3 24 (70.59%) Multithreading
4 17 (50.00%) Python
5 15 (44.12%) C
6 14 (41.18%) Windows
6 14 (41.18%) Software Engineering
6 14 (41.18%) CMake
7 12 (35.29%) Functional Testing
7 12 (35.29%) Bitcoin
7 12 (35.29%) Performance Testing
7 12 (35.29%) Test Automation
7 12 (35.29%) Pthreads
7 12 (35.29%) Cryptography
7 12 (35.29%) Java
7 12 (35.29%) Cryptocurrency
7 12 (35.29%) Blockchain
7 12 (35.29%) Multithreaded Programming
8 8 (23.53%) Virtual Team
8 8 (23.53%) Problem-Solving
8 8 (23.53%) OOP
8 8 (23.53%) Boost C++ Libraries
8 8 (23.53%) Computer Science
9 7 (20.59%) FIX Protocol
9 7 (20.59%) JSON
9 7 (20.59%) CentOS
9 7 (20.59%) Red Hat Enterprise Linux
9 7 (20.59%) Data Structures
9 7 (20.59%) ZeroMQ
9 7 (20.59%) WebSockets

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:

Cloud Services
1 2 (5.88%) Amazon AWS
1 2 (5.88%) Amazon EC2
1 2 (5.88%) Amazon ELB
1 2 (5.88%) Amazon S3
1 2 (5.88%) Virtual Private Cloud
Communications & Networking
1 4 (11.76%) RS-232
1 4 (11.76%) RS-485
2 3 (8.82%) SNMP
3 2 (5.88%) DNS
3 2 (5.88%) Firewall
3 2 (5.88%) FTP
3 2 (5.88%) HTTP
3 2 (5.88%) Internet
3 2 (5.88%) Intranet
3 2 (5.88%) Intrusion Detection
3 2 (5.88%) iSCSI
3 2 (5.88%) MPLS
3 2 (5.88%) NAS
3 2 (5.88%) SAN
3 2 (5.88%) SSH
3 2 (5.88%) TCP/IP
Database & Business Intelligence
1 12 (35.29%) Blockchain
2 3 (8.82%) Apache Cassandra
2 3 (8.82%) NoSQL
2 3 (8.82%) PostgreSQL
Development Applications
1 14 (41.18%) CMake
2 2 (5.88%) Atlassian Bamboo
2 2 (5.88%) Clang
2 2 (5.88%) Cucumber
2 2 (5.88%) Git (software)
2 2 (5.88%) Gradle
2 2 (5.88%) Jenkins
2 2 (5.88%) JUnit
General
1 3 (8.82%) Publishing
2 2 (5.88%) Finance
Job Titles
1 20 (58.82%) Developer
2 19 (55.88%) C++ Developer
3 7 (20.59%) Software Engineer
4 5 (14.71%) Embedded Engineer
4 5 (14.71%) Embedded Software Engineer
4 5 (14.71%) Senior Embedded Software Engineer
4 5 (14.71%) Senior Software Engineer
5 4 (11.76%) Blockchain Developer
6 3 (8.82%) Database Engineer
7 2 (5.88%) DevOps Engineer
7 2 (5.88%) Integration Engineer
7 2 (5.88%) Network Engineer
7 2 (5.88%) Senior DevOps
7 2 (5.88%) Senior DevOps Engineer
7 2 (5.88%) Senior Integration Engineer
7 2 (5.88%) Senior Network Engineer
8 1 (2.94%) C++ Software Developer
8 1 (2.94%) C++ Software Engineer
8 1 (2.94%) Software Developer
8 1 (2.94%) Technologist
Libraries, Frameworks & Software Standards
1 12 (35.29%) Pthreads
2 8 (23.53%) Boost C++ Libraries
3 7 (20.59%) FIX Protocol
3 7 (20.59%) JSON
3 7 (20.59%) Kafka
3 7 (20.59%) Protocol Buffers
3 7 (20.59%) WebSockets
3 7 (20.59%) ZeroMQ
4 4 (11.76%) .NET
5 2 (5.88%) STL
6 1 (2.94%) HTML
6 1 (2.94%) HTML5
6 1 (2.94%) Qt
Miscellaneous
1 12 (35.29%) Bitcoin
2 8 (23.53%) Computer Science
2 8 (23.53%) Virtual Team
3 7 (20.59%) Data Structures
3 7 (20.59%) Hedge funds
4 5 (14.71%) Field-Programmable Gate Array
5 4 (11.76%) Analytical Skills
6 3 (8.82%) Public Cloud
7 2 (5.88%) Linux Command Line
7 2 (5.88%) Management Information System
8 1 (2.94%) Algorithms
8 1 (2.94%) Self-Motivation
8 1 (2.94%) Smartphone
Operating Systems
1 26 (76.47%) Linux
2 14 (41.18%) Windows
3 7 (20.59%) CentOS
3 7 (20.59%) Fedora
3 7 (20.59%) Red Hat Enterprise Linux
4 5 (14.71%) Unix
5 1 (2.94%) Android
5 1 (2.94%) Apple iOS
5 1 (2.94%) Embedded Linux
5 1 (2.94%) Mac OS X
5 1 (2.94%) VxWorks
5 1 (2.94%) Windows Embedded Compact
Processes & Methodologies
1 24 (70.59%) Multithreading
2 14 (41.18%) Software Engineering
3 12 (35.29%) Cryptocurrency
3 12 (35.29%) Cryptography
3 12 (35.29%) Functional Testing
3 12 (35.29%) Multithreaded Programming
3 12 (35.29%) Performance Testing
3 12 (35.29%) Test Automation
4 8 (23.53%) OOP
4 8 (23.53%) Problem-Solving
5 7 (20.59%) Analytics
6 4 (11.76%) Project Management
6 4 (11.76%) Software Testing
6 4 (11.76%) Time Management
7 3 (8.82%) Agile Software Development
7 3 (8.82%) Continuous Improvement
7 3 (8.82%) Continuous Integration
7 3 (8.82%) Data Security
7 3 (8.82%) Open Source
7 3 (8.82%) Scrum
Programming Languages
1 27 (79.41%) C++
2 17 (50.00%) Python
3 15 (44.12%) C
4 12 (35.29%) Java
5 6 (17.65%) C#
6 2 (5.88%) Bash Shell
6 2 (5.88%) Shell Script
6 2 (5.88%) SQL
7 1 (2.94%) Embedded C
7 1 (2.94%) Embedded C++
Qualifications
1 2 (5.88%) Degree
1 2 (5.88%) Security Cleared
2 1 (2.94%) Computer Science Degree
2 1 (2.94%) DV Cleared
2 1 (2.94%) SC Cleared
Quality Assurance & Compliance
1 4 (11.76%) QA
System Software
1 4 (11.76%) Firmware
2 2 (5.88%) Active Directory
2 2 (5.88%) Docker
2 2 (5.88%) NFS
Systems Management
1 5 (14.71%) Kubernetes
2 3 (8.82%) Grafana
3 2 (5.88%) Ansible
3 2 (5.88%) Puppet
4 1 (2.94%) Prometheus
Vendors
1 7 (20.59%) Red Hat
2 3 (8.82%) PagerDuty
3 2 (5.88%) Cisco
3 2 (5.88%) F5
3 2 (5.88%) Juniper
4 1 (2.94%) Oracle
4 1 (2.94%) QNX