The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for Postfix skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited Postfix over the 3 months to 22 June 2017 with a comparison to the same period in the previous 2 years.

Postfix
London / City of London
3 months to
22 Jun 2017
Same period 2016 Same period 2015
Rank 236 257 316
Rank change year-on-year +21 +59  
Permanent jobs citing Postfix 1 2 2
As % of all permanent IT jobs advertised in the City of London 0.019% 0.031% 0.019%
As % of the System Software category 0.14% 0.24% 0.20%
Number of salaries quoted 1 2 2
Median salary £45,000 £50,000 £37,500
Median salary % change year-on-year -10.00% +33.33%  
UK excluding London median salary £40,000 £35,000 £45,000
% change year-on-year +14.28% -22.22%  

Postfix is in the system software skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for system software skills.

System Software Skills
City of London
Permanent job vacancies with a requirement for system software skills 736 818 988
As % of all permanent IT job vacancies advertised in the City of London 14.17% 12.82% 9.51%
Number of salaries quoted 658 756 868
Median salary £50,000 £52,500 £50,000
Median salary % change year-on-year -4.76% +5.00%  
90% offered a salary of more than £29,000 £31,500 £31,000
10% offered a salary of more than £75,000 £65,000 £72,500
UK excluding London median salary £38,000 £38,500 £37,500
% change year-on-year -1.29% +2.66%  

Postfix
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing Postfix as a proportion of all permanent or contract IT jobs with a match in the System Software category.

Job vacancy trend for Postfix in the City of London

Postfix
Salary Trend in the City of London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing Postfix in the City of London.

Salary trend for Postfix in the City of London

For the 6 months to 22 June 2017, IT jobs citing Postfix also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the City of London region with a requirement for Postfix.

1 1 (100.00%) C
1 1 (100.00%) Perl
1 1 (100.00%) PHP
1 1 (100.00%) MySQL
1 1 (100.00%) Unix
1 1 (100.00%) Linux
1 1 (100.00%) Apache
1 1 (100.00%) FreeBSD
1 1 (100.00%) DNS
1 1 (100.00%) Red Hat
1 1 (100.00%) Nagios
1 1 (100.00%) Configuration Management
1 1 (100.00%) LAMP
1 1 (100.00%) VMware
1 1 (100.00%) Xen
1 1 (100.00%) VMware Infrastructure
1 1 (100.00%) CentOS
1 1 (100.00%) Red Hat Enterprise Linux
1 1 (100.00%) Munin
1 1 (100.00%) Puppet
1 1 (100.00%) MRTG
1 1 (100.00%) Analytics
1 1 (100.00%) KVM
1 1 (100.00%) oVirt
1 1 (100.00%) PowerDNS

Postfix
Co-occurring IT Skills in the City of London 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 1 (100.00%) Apache
Communications & Networking
1 1 (100.00%) DNS
1 1 (100.00%) MRTG
Database & Business Intelligence
1 1 (100.00%) MySQL
Job Titles
1 1 (100.00%) Administrator
1 1 (100.00%) Systems Administrator
Libraries, Frameworks & Software Standards
1 1 (100.00%) LAMP
Operating Systems
1 1 (100.00%) CentOS
1 1 (100.00%) FreeBSD
1 1 (100.00%) Linux
1 1 (100.00%) Red Hat Enterprise Linux
1 1 (100.00%) Unix
Processes & Methodologies
1 1 (100.00%) Analytics
1 1 (100.00%) Configuration Management
Programming Languages
1 1 (100.00%) C
1 1 (100.00%) Perl
1 1 (100.00%) PHP
System Software
1 1 (100.00%) KVM
1 1 (100.00%) oVirt
1 1 (100.00%) PowerDNS
1 1 (100.00%) VMware Infrastructure
1 1 (100.00%) Xen
Systems Management
1 1 (100.00%) Munin
1 1 (100.00%) Nagios
1 1 (100.00%) Puppet
Vendors
1 1 (100.00%) Red Hat
1 1 (100.00%) VMware