Period
to 29 July 2021

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for Linux skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited Linux over the 6 months to 29 July 2021 with a comparison to the same period in the previous 2 years.

Linux
Central London > City of London
6 months to
29 Jul 2021
Same period 2020 Same period 2019
Rank 30 22 20
Rank change year-on-year -8 -2 0
Permanent jobs citing Linux 435 509 1,003
As % of all permanent jobs advertised in the City of London 7.78% 9.53% 9.80%
As % of the Operating Systems category 51.42% 46.78% 41.46%
Number of salaries quoted 385 440 893
10th Percentile £45,000 £45,000 £45,000
25th Percentile £57,500 £58,750 £56,250
Median annual salary (50th Percentile) £75,000 £70,000 £72,500
Median % change year-on-year +7.14% -3.45% +7.41%
75th Percentile £95,000 £85,000 £87,500
90th Percentile £109,500 £103,750 £110,600
Central London median annual salary £75,000 £70,000 £70,000
% change year-on-year +7.14% - +7.69%

Linux is in the Operating Systems category. The following 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 operating system skills.

All Operating Systems
City of London
Permanent vacancies with a requirement for operating system skills 846 1,088 2,419
As % of all permanent IT jobs advertised in the City of London 15.14% 20.38% 23.63%
Number of salaries quoted 743 967 2,162
10th Percentile £38,750 £32,500 £29,000
25th Percentile £51,250 £46,250 £43,750
Median annual salary (50th Percentile) £67,500 £65,000 £62,500
Median % change year-on-year +3.85% +4.00% +4.17%
75th Percentile £87,500 £77,500 £80,000
90th Percentile £99,750 £91,250 £95,000
Central London median annual salary £62,500 £65,000 £60,000
% change year-on-year -3.85% +8.33% -

Linux
Job Vacancy Trend in the City of London

Job postings citing Linux as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for Linux in the City of London

Linux
Salary Trend in the City of London

3-month moving average salary quoted in jobs citing Linux in the City of London.

Salary trend for Linux in the City of London

Linux
Salary Histogram in the City of London

Salary distribution for jobs citing Linux in the City of London over the 6 months to 29 July 2021.

Salary histogram for Linux in the City of London

For the 6 months to 29 July 2021, IT jobs citing Linux 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 across the City of London region with a requirement for Linux.

1 194 (44.60%) AWS
2 189 (43.45%) DevOps
3 176 (40.46%) Python
4 165 (37.93%) Finance
5 159 (36.55%) Docker
6 147 (33.79%) Kubernetes
7 145 (33.33%) Terraform
8 131 (30.11%) Windows
9 121 (27.82%) Azure
10 114 (26.21%) Unix
11 106 (24.37%) Infrastructure as Code
12 105 (24.14%) Ansible
12 105 (24.14%) Java
13 104 (23.91%) Agile Software Development
14 101 (23.22%) SQL
15 99 (22.76%) Jenkins
16 80 (18.39%) Bash Shell
17 75 (17.24%) Puppet
18 69 (15.86%) Git (software)
19 63 (14.48%) Banking
20 59 (13.56%) PowerShell
21 55 (12.64%) Fintech
22 49 (11.26%) Site Reliability Engineering
23 48 (11.03%) Social Skills
23 48 (11.03%) Low Latency
23 48 (11.03%) Configuration Management
24 46 (10.57%) C++
24 46 (10.57%) GCP
25 41 (9.43%) VMware
26 39 (8.97%) Software Engineering

Linux
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 17 (3.91%) Elasticsearch
2 11 (2.53%) Apache Airflow
3 10 (2.30%) nginx
4 9 (2.07%) OpenStack
5 8 (1.84%) Confluence
6 6 (1.38%) Apache Spark
7 5 (1.15%) Apache
7 5 (1.15%) IIS
8 4 (0.92%) WebSphere
9 3 (0.69%) Oracle Coherence
10 2 (0.46%) SAS
10 2 (0.46%) SharePoint
11 1 (0.23%) Cloud Foundry
11 1 (0.23%) CMS
11 1 (0.23%) ejabberd
11 1 (0.23%) Ethereum
11 1 (0.23%) Exchange Server 2003
11 1 (0.23%) MS Exchange
11 1 (0.23%) Oracle Workflow
11 1 (0.23%) Tomcat
Applications
1 3 (0.69%) Microsoft Office
Business Applications
1 3 (0.69%) Distributed Ledger
2 2 (0.46%) IntelliMatch
2 2 (0.46%) Payment Gateway
3 1 (0.23%) FINCAD Analytics
3 1 (0.23%) Oracle EBS
3 1 (0.23%) Oracle EBS R12
3 1 (0.23%) Salerio
3 1 (0.23%) SunGard Martini
3 1 (0.23%) Temenos T24
Cloud Services
1 194 (44.60%) AWS
2 121 (27.82%) Azure
3 46 (10.57%) GCP
4 32 (7.36%) Amazon EC2
5 22 (5.06%) Serverless
6 18 (4.14%) SaaS
7 17 (3.91%) AWS Lambda
8 15 (3.45%) Microsoft 365
9 14 (3.22%) Amazon S3
10 12 (2.76%) GitHub
10 12 (2.76%) IaaS
11 9 (2.07%) Datadog
12 7 (1.61%) Amazon ECS
12 7 (1.61%) Cloud Computing
12 7 (1.61%) PaaS
13 6 (1.38%) Azure Active Directory
14 5 (1.15%) AWS CloudFormation
14 5 (1.15%) OpenShift
14 5 (1.15%) Snowflake
15 4 (0.92%) Amazon ELB
Communications & Networking
1 28 (6.44%) Firewall
2 21 (4.83%) TCP/IP
3 11 (2.53%) VPN
4 10 (2.30%) SSH
5 9 (2.07%) LAN
5 9 (2.07%) SAN
5 9 (2.07%) WAN
6 8 (1.84%) Network Security
7 7 (1.61%) BGP
7 7 (1.61%) DNS
7 7 (1.61%) HTTP
7 7 (1.61%) Multicast
8 6 (1.38%) VLAN
9 5 (1.15%) OSPF
10 4 (0.92%) DHCP
10 4 (0.92%) Wireless
11 3 (0.69%) Internet
11 3 (0.69%) IPsec
11 3 (0.69%) MPLS
11 3 (0.69%) SSL
Database & Business Intelligence
1 31 (7.13%) SQL Server
2 19 (4.37%) MySQL
2 19 (4.37%) Relational Database
3 18 (4.14%) MongoDB
3 18 (4.14%) PostgreSQL
4 15 (3.45%) NoSQL
5 14 (3.22%) Apache Cassandra
6 13 (2.99%) KDB
7 12 (2.76%) Hadoop
8 11 (2.53%) Amazon RDS
9 10 (2.30%) Big Data
10 8 (1.84%) Oracle Database
11 6 (1.38%) Data Warehouse
11 6 (1.38%) SQL Server Integration Services
11 6 (1.38%) SQL Server Reporting Services
12 5 (1.15%) Blockchain
12 5 (1.15%) InfluxDB
13 4 (0.92%) BigQuery
13 4 (0.92%) Data Mining
13 4 (0.92%) HBase
Development Applications
1 99 (22.76%) Jenkins
2 69 (15.86%) Git (software)
3 32 (7.36%) GitLab
4 27 (6.21%) JIRA
5 25 (5.75%) TeamCity
6 18 (4.14%) Bitbucket
7 16 (3.68%) Atlassian Bamboo
7 16 (3.68%) Octopus Deploy
8 13 (2.99%) Selenium
9 10 (2.30%) Cucumber
9 10 (2.30%) REST Assured
10 9 (2.07%) Artifactory
10 9 (2.07%) Maven
11 8 (1.84%) SoapUI
12 7 (1.61%) Sonatype Nexus
13 6 (1.38%) Subversion
13 6 (1.38%) Travis CI
14 5 (1.15%) Gradle
15 4 (0.92%) CircleCI
15 4 (0.92%) IntelliJ
General
1 165 (37.93%) Finance
2 63 (14.48%) Banking
3 48 (11.03%) Social Skills
4 26 (5.98%) Advertising
5 24 (5.52%) Front Office
6 17 (3.91%) Games
7 15 (3.45%) Telecoms
8 14 (3.22%) Analytical Skills
9 12 (2.76%) Investment Banking
10 9 (2.07%) Retail
11 6 (1.38%) Back Office
11 6 (1.38%) Legal
12 5 (1.15%) Law
12 5 (1.15%) Public Sector
13 4 (0.92%) Marketing
14 3 (0.69%) International Banking
14 3 (0.69%) Organisational Skills
14 3 (0.69%) Retail Banking
14 3 (0.69%) Wholesale Banking
15 2 (0.46%) Documentation Skills
Job Titles
1 127 (29.20%) DevOps Engineer
2 82 (18.85%) Developer
3 40 (9.20%) AWS Engineer
4 36 (8.28%) Senior DevOps
5 35 (8.05%) Senior DevOps Engineer
6 33 (7.59%) Senior Developer
7 30 (6.90%) Linux Engineer
8 29 (6.67%) Java Developer
9 27 (6.21%) AWS DevOps
10 26 (5.98%) AWS DevOps Engineer
11 23 (5.29%) Infrastructure Engineer
12 20 (4.60%) Analyst
12 20 (4.60%) DevOps Engineer - Fintech
12 20 (4.60%) Linux DevOps Engineer
12 20 (4.60%) Linux/Unix DevOps
13 19 (4.37%) Junior
14 18 (4.14%) Kubernetes Engineer
14 18 (4.14%) Site Reliability Engineer
15 17 (3.91%) Automation Engineer
16 16 (3.68%) Platform Engineer
Libraries, Frameworks & Software Standards
1 30 (6.90%) Kafka
2 22 (5.06%) .NET
2 22 (5.06%) Elastic Stack
3 21 (4.83%) FIX Protocol
4 19 (4.37%) AngularJS
5 18 (4.14%) Web Services
5 18 (4.14%) XML
6 16 (3.68%) React
7 14 (3.22%) HTML
7 14 (3.22%) JSON
8 13 (2.99%) Node.js
8 13 (2.99%) REST
8 13 (2.99%) Spring
9 12 (2.76%) STL
10 11 (2.53%) HTML5
11 10 (2.30%) Gherkin
12 9 (2.07%) CSS
13 7 (1.61%) .NET Core
14 6 (1.38%) RESTful
15 5 (1.15%) OAuth
Miscellaneous
1 28 (6.44%) Greenfield Project
2 20 (4.60%) Fixed Income
3 15 (3.45%) Derivative
4 13 (2.99%) Data Centre
4 13 (2.99%) Equities
5 12 (2.76%) Data Structures
5 12 (2.76%) Public Cloud
5 12 (2.76%) Spread Betting
6 11 (2.53%) Management Information System
7 10 (2.30%) Cloud Native
8 9 (2.07%) Algorithms
8 9 (2.07%) Hedge funds
9 8 (1.84%) Foreign Exchange (FX)
9 8 (1.84%) Hybrid Cloud
10 7 (1.61%) Private Cloud
11 6 (1.38%) Enterprise Software
12 5 (1.15%) Credit Risk
12 5 (1.15%) Enterprise Storage
12 5 (1.15%) OTC Derivatives
13 4 (0.92%) Video Conferencing
Operating Systems
1 131 (30.11%) Windows
2 114 (26.21%) Unix
3 38 (8.74%) Red Hat Enterprise Linux
4 36 (8.28%) Ubuntu
5 32 (7.36%) CentOS
6 22 (5.06%) Windows Server
7 6 (1.38%) CoreOS
7 6 (1.38%) Windows 10
8 4 (0.92%) Mac OS
8 4 (0.92%) Mac OS X
9 3 (0.69%) Solaris
9 3 (0.69%) Windows 7
9 3 (0.69%) Windows Server 2003
9 3 (0.69%) Windows XP
10 2 (0.46%) Android
10 2 (0.46%) SUSE
10 2 (0.46%) Windows Server 2008
10 2 (0.46%) Windows Server 2019
10 2 (0.46%) zOS
11 1 (0.23%) Apple iOS
Processes & Methodologies
1 189 (43.45%) DevOps
2 106 (24.37%) Infrastructure as Code
3 104 (23.91%) Agile Software Development
4 55 (12.64%) Fintech
5 49 (11.26%) Site Reliability Engineering
6 48 (11.03%) Configuration Management
6 48 (11.03%) Low Latency
7 39 (8.97%) Software Engineering
8 38 (8.74%) SDLC
9 36 (8.28%) Infrastructure Engineering
10 34 (7.82%) Continuous Integration
11 33 (7.59%) Multithreading
12 30 (6.90%) Problem-Solving
12 30 (6.90%) Test Automation
13 26 (5.98%) Deployment Automation
14 25 (5.75%) Microservices
15 24 (5.52%) Electronic Trading
16 22 (5.06%) Automated Trading
17 21 (4.83%) OOP
18 20 (4.60%) TDD
Programming Languages
1 176 (40.46%) Python
2 105 (24.14%) Java
3 101 (23.22%) SQL
4 80 (18.39%) Bash Shell
5 59 (13.56%) PowerShell
6 46 (10.57%) C++
7 32 (7.36%) C#
7 32 (7.36%) JavaScript
8 29 (6.67%) Shell Script
9 22 (5.06%) Perl
10 9 (2.07%) R
11 8 (1.84%) Go
11 8 (1.84%) PHP
12 7 (1.61%) Ruby
13 6 (1.38%) Scala
14 5 (1.15%) ES6
15 4 (0.92%) C
15 4 (0.92%) Java 8
15 4 (0.92%) TypeScript
16 3 (0.69%) PL/SQL
Qualifications
1 19 (4.37%) Degree
2 14 (3.22%) Security Cleared
3 13 (2.99%) Cisco Certification
3 13 (2.99%) SC Cleared
4 9 (2.07%) CCNA
5 6 (1.38%) CCNP
5 6 (1.38%) Computer Science Degree
6 5 (1.15%) CISSP
7 4 (0.92%) CISA
7 4 (0.92%) CISM
7 4 (0.92%) ITIL Foundation Certificate
7 4 (0.92%) Microsoft Certification
8 3 (0.69%) CEH
8 3 (0.69%) DV Cleared
8 3 (0.69%) EnCE
8 3 (0.69%) GCFA
8 3 (0.69%) GCFE
8 3 (0.69%) GREM
8 3 (0.69%) MCSE
9 2 (0.46%) CCENT
Quality Assurance & Compliance
1 39 (8.97%) QA
2 7 (1.61%) ISO/IEC 27001
3 4 (0.92%) GDPR
3 4 (0.92%) NIST
4 3 (0.69%) PMO
5 2 (0.46%) PSD2
5 2 (0.46%) Sarbanes-Oxley
6 1 (0.23%) Cyber Essentials
6 1 (0.23%) Cyber Essentials PLUS
6 1 (0.23%) ISO 15022
6 1 (0.23%) ISO 20022
6 1 (0.23%) SLA
System Software
1 159 (36.55%) Docker
2 31 (7.13%) VMware Infrastructure
3 14 (3.22%) Active Directory
4 9 (2.07%) Hyper-V
5 8 (1.84%) Apache ZooKeeper
5 8 (1.84%) vSphere
6 3 (0.69%) StorNext
6 3 (0.69%) Virtual Servers
6 3 (0.69%) Xsan
7 2 (0.46%) LXC
7 2 (0.46%) RACF
7 2 (0.46%) Time Sharing Option
7 2 (0.46%) Virtual Desktop
7 2 (0.46%) Xen
8 1 (0.23%) iptables
8 1 (0.23%) Kamailio
8 1 (0.23%) KVM
8 1 (0.23%) QEMU
8 1 (0.23%) Virtual Machines
8 1 (0.23%) VMware ESXi
Systems Management
1 147 (33.79%) Kubernetes
2 145 (33.33%) Terraform
3 105 (24.14%) Ansible
4 75 (17.24%) Puppet
5 22 (5.06%) Opscode Chef
6 9 (2.07%) Grafana
7 8 (1.84%) Nagios
7 8 (1.84%) Packer
7 8 (1.84%) Rancher
8 6 (1.38%) EnCase
8 6 (1.38%) FTK
8 6 (1.38%) Istio
8 6 (1.38%) Prometheus
9 5 (1.15%) Kibana
9 5 (1.15%) Salt
10 4 (0.92%) Docker Swarm
10 4 (0.92%) SCCM
11 3 (0.69%) NetBackup
11 3 (0.69%) SCOM
11 3 (0.69%) ZABBIX
Vendors
1 41 (9.43%) VMware
2 38 (8.74%) Microsoft
3 29 (6.67%) Oracle
4 25 (5.75%) Cisco
5 21 (4.83%) Red Hat
6 12 (2.76%) Splunk
7 10 (2.30%) Juniper
8 8 (1.84%) Google
8 8 (1.84%) HP
8 8 (1.84%) IBM
9 7 (1.61%) Dell
9 7 (1.61%) Palo Alto
9 7 (1.61%) SonicWALL
10 6 (1.38%) AppDynamics
11 5 (1.15%) Supermicro
11 5 (1.15%) Sybase
12 4 (0.92%) Bloomberg
12 4 (0.92%) Fortinet
12 4 (0.92%) Greenplum
12 4 (0.92%) SolarWinds