The following table provides summary statistics for contract job vacancies advertised in England 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 27 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 / England
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 593 621 616
Rank change year-on-year +28 -5  
Contract jobs citing POSIX 8 2 10
As % of all contract IT jobs advertised in England 0.018% 0.004% 0.020%
As % of the Libraries, Frameworks & Software Standards category 0.057% 0.014% 0.071%
Number of daily rates quoted 6 0 8
Median daily rate £513 - £415
UK excluding London median daily rate £513 - £415
Number of hourly rates quoted 0 0 0
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 advertised in England with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
England
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 13919 14406 14028
As % of all contract IT job vacancies advertised in England 32.19% 29.05% 27.94%
Number of daily rates quoted 9670 10258 9554
Median daily rate £450 £425 £388
Median daily rate % change year-on-year +5.88% +9.67%  
90% offered a daily rate of more than £320 £300 £288
10% offered a daily rate of more than £588 £570 £550
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 187 175 197
Median hourly rate £41.50 £36.00 £37.45
Median hourly rate % change year-on-year +15.27% -3.87%  
90% offered a hourly rate of more than £22.00 £18.80 £17.50
10% offered a hourly rate of more than £55.00 £50.00 £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 in England

The job posting trend of jobs advertised in England citing POSIX as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for POSIX in England

POSIX
Contractor Daily Rate Trend in England

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

Contractor daily rate trend for POSIX in England

POSIX
Contractor Daily Rate Histogram in England

The daily rate distribution of IT jobs citing POSIX in England over the 3 months to 27 June 2017.

Contractor daily rate histogram for POSIX in England

POSIX
Contractor Hourly Rate Trend in England

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

Contractor hourly rate trend for POSIX in England

POSIX
Contract Job Locations in England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing POSIX within the England region over the 3 months to 27 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
South East - 5 £550 -
London - 1 - -
North West - 1 - -
East of England - 1 £425 - 2
POSIX
UK

For the 6 months to 27 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 across the England region with a requirement for POSIX.

1 12 (100.00%) Linux
2 9 (75.00%) C
3 6 (50.00%) Open Source
4 5 (41.67%) C++
4 5 (41.67%) Java
4 5 (41.67%) Python
5 4 (33.33%) HTML
5 4 (33.33%) Digital TV
5 4 (33.33%) DVB
5 4 (33.33%) STB
5 4 (33.33%) Software Engineering
5 4 (33.33%) HTML5
5 4 (33.33%) Embedded Systems
6 3 (25.00%) Over-the-Top Content
6 3 (25.00%) DLNA
6 3 (25.00%) UPnP
6 3 (25.00%) Agile Software Development
6 3 (25.00%) Telecoms
6 3 (25.00%) DOCSIS
6 3 (25.00%) Middleware
6 3 (25.00%) Unix
7 2 (16.67%) Windows
7 2 (16.67%) HTTP
7 2 (16.67%) TCP/IP
7 2 (16.67%) DNS
7 2 (16.67%) SSL
7 2 (16.67%) Perl
7 2 (16.67%) BGP
7 2 (16.67%) Internet
7 2 (16.67%) Shell Script

POSIX
Co-occurring IT Skills in England 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 (16.67%) nginx
1 2 (16.67%) OpenStack
2 1 (8.33%) Apache
2 1 (8.33%) Tomcat
2 1 (8.33%) Traffic Server
Cloud Services
1 2 (16.67%) Amazon AWS
1 2 (16.67%) AWS CloudFormation
1 2 (16.67%) AWS OpsWorks
Communications & Networking
1 4 (33.33%) DVB
2 3 (25.00%) DLNA
2 3 (25.00%) DOCSIS
2 3 (25.00%) UPnP
3 2 (16.67%) BGP
3 2 (16.67%) DNS
3 2 (16.67%) HTTP
3 2 (16.67%) Internet
3 2 (16.67%) SSL
3 2 (16.67%) TCP/IP
4 1 (8.33%) IPv4
4 1 (8.33%) IPv6
Database & Business Intelligence
1 1 (8.33%) Apache Cassandra
1 1 (8.33%) CouchDB
1 1 (8.33%) Data Mining
1 1 (8.33%) MariaDB
1 1 (8.33%) MongoDB
1 1 (8.33%) MySQL
1 1 (8.33%) Neo4j
1 1 (8.33%) PostgreSQL
1 1 (8.33%) Relational Database
Development Applications
1 1 (8.33%) GCC
1 1 (8.33%) Git (software)
1 1 (8.33%) SonarQube
General
1 3 (25.00%) Telecoms
2 1 (8.33%) Finance
Job Titles
1 5 (41.67%) Architect
2 4 (33.33%) Developer
3 3 (25.00%) Software Developer
3 3 (25.00%) Software Engineer
4 2 (16.67%) AWS Architect
4 2 (16.67%) Digital Architect
4 2 (16.67%) DTV Architect
4 2 (16.67%) Principal Developer
4 2 (16.67%) Principal Software Developer
4 2 (16.67%) Senior Architect
4 2 (16.67%) Senior Software Engineer
4 2 (16.67%) Systems Architect
5 1 (8.33%) Broadcast Architect
5 1 (8.33%) C Developer
5 1 (8.33%) Java Developer
5 1 (8.33%) Senior Developer
5 1 (8.33%) Senior Java Developer
5 1 (8.33%) Software Architect
Libraries, Frameworks & Software Standards
1 4 (33.33%) HTML
1 4 (33.33%) HTML5
2 3 (25.00%) Middleware
3 2 (16.67%) ExaBGP
4 1 (8.33%) CSS
4 1 (8.33%) CSS3
4 1 (8.33%) Node.js
4 1 (8.33%) Web Services
Miscellaneous
1 4 (33.33%) Digital TV
1 4 (33.33%) Embedded Systems
1 4 (33.33%) STB
2 3 (25.00%) Over-the-Top Content
3 2 (16.67%) Computer Science
3 2 (16.67%) e-Health
3 2 (16.67%) PKI
3 2 (16.67%) Public Cloud
4 1 (8.33%) Device Driver
Operating Systems
1 12 (100.00%) Linux
2 3 (25.00%) Unix
3 2 (16.67%) Windows
4 1 (8.33%) Debian
4 1 (8.33%) Mac OS
Processes & Methodologies
1 6 (50.00%) Open Source
2 4 (33.33%) Software Engineering
3 3 (25.00%) Agile Software Development
4 2 (16.67%) Bioinformatics
4 2 (16.67%) Data Management
4 2 (16.67%) Data Privacy
4 2 (16.67%) Data Security
4 2 (16.67%) Extreme Programming
4 2 (16.67%) Health Informatics
4 2 (16.67%) Informatics
4 2 (16.67%) Load Testing
4 2 (16.67%) Mathematics
4 2 (16.67%) Physics
4 2 (16.67%) SABSA
5 1 (8.33%) BDD
5 1 (8.33%) Device Driver Development
5 1 (8.33%) Kernel Tuning
5 1 (8.33%) Mentoring
5 1 (8.33%) Open Source Development
5 1 (8.33%) Unit Testing
Programming Languages
1 9 (75.00%) C
2 5 (41.67%) C++
2 5 (41.67%) Java
2 5 (41.67%) Python
3 2 (16.67%) Go
3 2 (16.67%) Haskell
3 2 (16.67%) Perl
3 2 (16.67%) R
3 2 (16.67%) Ruby
3 2 (16.67%) Shell Script
4 1 (8.33%) Delphi
4 1 (8.33%) JavaScript
4 1 (8.33%) Scala
Qualifications
1 2 (16.67%) CISA
1 2 (16.67%) CISM
1 2 (16.67%) CISSP
1 2 (16.67%) Computer Science Degree
1 2 (16.67%) Degree
1 2 (16.67%) GSEC
System Software
1 2 (16.67%) Docker
1 2 (16.67%) iptables
1 2 (16.67%) KVM
1 2 (16.67%) LXC
1 2 (16.67%) Xen
2 1 (8.33%) Slurm Workload Manager
Systems Management
1 2 (16.67%) Ansible
1 2 (16.67%) Graphite
1 2 (16.67%) Opscode Chef
1 2 (16.67%) Puppet
1 2 (16.67%) Salt
1 2 (16.67%) SELinux
2 1 (8.33%) Mesos
Vendors
1 2 (16.67%) Qualys
2 1 (8.33%) Pegasus