The following table provides summary statistics for contract job vacancies with a requirement for POSIX skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited POSIX over the 3 months to 29 June 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Portable Operating System Interface (POSIX)
UK
3 months to
29 Jun 2017
Same period 2016 Same period 2015
Rank 605 648 634
Rank change year-on-year +43 -14  
Contract jobs citing POSIX 9 1 10
As % of all contract IT jobs advertised in the UK 0.019% 0.002% 0.018%
As % of the Libraries, Frameworks & Software Standards category 0.060% 0.007% 0.065%
Number of daily rates quoted 6 0 8
UK median daily rate £513 - £415
10th Percentile £438 - £335
90th Percentile £613 - £423
UK excluding London median daily rate £513 - £415
Number of hourly rates quoted 0 0 0
UK median hourly rate - - -
UK excluding London median hourly rate - - -

POSIX 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 contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
UK
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 15092 15313 15456
As % of all contract IT job vacancies advertised in the UK 32.04% 28.51% 27.58%
Number of daily rates quoted 40585 42041 38676
UK median daily rate £434 £420 £388
Median daily rate % change year-on-year +3.21% +8.38%  
10th Percentile £306 £297 £269
90th Percentile £600 £575 £563
UK excluding London median daily rate £395 £375 £350
% change year-on-year +5.33% +7.14%  
Number of hourly rates quoted 589 519 682
UK median hourly rate £42.50 £36.00 £37.80
Median hourly rate % change year-on-year +18.05% -4.76%  
10th Percentile £19.25 £17.20 £16.61
90th Percentile £57.50 £48.76 £55.00
UK excluding London median hourly rate £42.50 £36.00 £40.00
% change year-on-year +18.05% -10.00%  

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
Contractor Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing POSIX.

Contractor daily rate trend for POSIX in the UK

POSIX
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing POSIX over the 3 months to 29 June 2017.

Contractor daily rate histogram for POSIX in the UK

POSIX
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing POSIX.

Contractor hourly rate trend for POSIX in the UK

POSIX
Top 6 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing POSIX within the UK over the 3 months to 29 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
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +35 8 £513 - 2
UK excluding London +70 7 £513 - 2
South East - 5 £550 -
East of England - 1 £425 - 2
North of England - 1 - -
London - 1 - -

For the 6 months to 29 June 2017, IT contractor jobs citing POSIX also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads with a requirement for POSIX.

1 13 (100.00%) Linux
2 10 (76.92%) C
3 6 (46.15%) C++
3 6 (46.15%) Java
3 6 (46.15%) Open Source
4 5 (38.46%) Python
5 4 (30.77%) HTML
5 4 (30.77%) Digital TV
5 4 (30.77%) DVB
5 4 (30.77%) Agile Software Development
5 4 (30.77%) STB
5 4 (30.77%) Software Engineering
5 4 (30.77%) HTML5
5 4 (30.77%) Embedded Systems
6 3 (23.08%) DLNA
6 3 (23.08%) Over-the-Top Content
6 3 (23.08%) UPnP
6 3 (23.08%) Degree
6 3 (23.08%) Telecoms
6 3 (23.08%) DOCSIS
6 3 (23.08%) Middleware
6 3 (23.08%) Unix
7 2 (15.38%) Windows
7 2 (15.38%) HTTP
7 2 (15.38%) TCP/IP
7 2 (15.38%) DNS
7 2 (15.38%) SSL
7 2 (15.38%) Perl
7 2 (15.38%) BGP
7 2 (15.38%) Internet

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 (15.38%) nginx
1 2 (15.38%) OpenStack
2 1 (7.69%) Apache
2 1 (7.69%) Tomcat
2 1 (7.69%) Traffic Server
Cloud Services
1 2 (15.38%) Amazon AWS
1 2 (15.38%) AWS CloudFormation
1 2 (15.38%) AWS OpsWorks
Communications & Networking
1 4 (30.77%) DVB
2 3 (23.08%) DLNA
2 3 (23.08%) DOCSIS
2 3 (23.08%) UPnP
3 2 (15.38%) BGP
3 2 (15.38%) DNS
3 2 (15.38%) HTTP
3 2 (15.38%) Internet
3 2 (15.38%) SSL
3 2 (15.38%) TCP/IP
4 1 (7.69%) IPv4
4 1 (7.69%) IPv6
Database & Business Intelligence
1 1 (7.69%) Apache Cassandra
1 1 (7.69%) CouchDB
1 1 (7.69%) Data Mining
1 1 (7.69%) MariaDB
1 1 (7.69%) MongoDB
1 1 (7.69%) MySQL
1 1 (7.69%) Neo4j
1 1 (7.69%) PostgreSQL
1 1 (7.69%) Relational Database
Development Applications
1 1 (7.69%) GCC
1 1 (7.69%) Git (software)
1 1 (7.69%) SonarQube
General
1 3 (23.08%) Telecoms
2 1 (7.69%) Automotive
2 1 (7.69%) Finance
Job Titles
1 5 (38.46%) Architect
2 4 (30.77%) Developer
3 3 (23.08%) Software Developer
3 3 (23.08%) Software Engineer
4 2 (15.38%) AWS Architect
4 2 (15.38%) Digital Architect
4 2 (15.38%) DTV Architect
4 2 (15.38%) Principal Developer
4 2 (15.38%) Principal Software Developer
4 2 (15.38%) Senior Architect
4 2 (15.38%) Senior Software Engineer
4 2 (15.38%) Systems Architect
5 1 (7.69%) Broadcast Architect
5 1 (7.69%) C Developer
5 1 (7.69%) Java Developer
5 1 (7.69%) Senior Developer
5 1 (7.69%) Senior Java Developer
5 1 (7.69%) Software Architect
Libraries, Frameworks & Software Standards
1 4 (30.77%) HTML
1 4 (30.77%) HTML5
2 3 (23.08%) Middleware
3 2 (15.38%) ExaBGP
4 1 (7.69%) CSS
4 1 (7.69%) CSS3
4 1 (7.69%) Node.js
4 1 (7.69%) Web Services
Miscellaneous
1 4 (30.77%) Digital TV
1 4 (30.77%) Embedded Systems
1 4 (30.77%) STB
2 3 (23.08%) Over-the-Top Content
3 2 (15.38%) Computer Science
3 2 (15.38%) e-Health
3 2 (15.38%) PKI
3 2 (15.38%) Public Cloud
4 1 (7.69%) Device Driver
4 1 (7.69%) Infotainment
Operating Systems
1 13 (100.00%) Linux
2 3 (23.08%) Unix
3 2 (15.38%) Windows
4 1 (7.69%) Android
4 1 (7.69%) Debian
4 1 (7.69%) Mac OS
Processes & Methodologies
1 6 (46.15%) Open Source
2 4 (30.77%) Agile Software Development
2 4 (30.77%) Software Engineering
3 2 (15.38%) Bioinformatics
3 2 (15.38%) Data Management
3 2 (15.38%) Data Privacy
3 2 (15.38%) Data Security
3 2 (15.38%) Extreme Programming
3 2 (15.38%) Health Informatics
3 2 (15.38%) Informatics
3 2 (15.38%) Load Testing
3 2 (15.38%) Mathematics
3 2 (15.38%) Physics
3 2 (15.38%) SABSA
4 1 (7.69%) Device Driver Development
4 1 (7.69%) Kernel Tuning
4 1 (7.69%) Mentoring
4 1 (7.69%) Multithreaded Programming
4 1 (7.69%) Open Source Development
4 1 (7.69%) Unit Testing
Programming Languages
1 10 (76.92%) C
2 6 (46.15%) C++
2 6 (46.15%) Java
3 5 (38.46%) Python
4 2 (15.38%) Go
4 2 (15.38%) Haskell
4 2 (15.38%) Perl
4 2 (15.38%) R
4 2 (15.38%) Ruby
4 2 (15.38%) Shell Script
5 1 (7.69%) Delphi
5 1 (7.69%) JavaScript
5 1 (7.69%) Scala
Qualifications
1 3 (23.08%) Degree
2 2 (15.38%) CISA
2 2 (15.38%) CISM
2 2 (15.38%) CISSP
2 2 (15.38%) Computer Science Degree
2 2 (15.38%) GSEC
3 1 (7.69%) Master's Degree
System Software
1 2 (15.38%) Docker
1 2 (15.38%) iptables
1 2 (15.38%) KVM
1 2 (15.38%) LXC
1 2 (15.38%) Xen
2 1 (7.69%) Slurm Workload Manager
Systems Management
1 2 (15.38%) Ansible
1 2 (15.38%) Graphite
1 2 (15.38%) Opscode Chef
1 2 (15.38%) Puppet
1 2 (15.38%) Salt
1 2 (15.38%) SELinux
2 1 (7.69%) Mesos
Vendors
1 2 (15.38%) Qualys
2 1 (7.69%) Pegasus
2 1 (7.69%) QNX