Period
to 3 August 2021

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for Unix skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited Unix over the 6 months to 3 August 2021 with a comparison to the same period in the previous 2 years.

Unix
Central London > City of London
6 months to
3 Aug 2021
Same period 2020 Same period 2019
Rank 107 89 84
Rank change year-on-year -18 -5 +8
Permanent jobs citing Unix 149 151 387
As % of all permanent jobs advertised in the City of London 2.66% 2.90% 3.76%
As % of the Operating Systems category 17.45% 14.21% 16.08%
Number of salaries quoted 132 128 329
10th Percentile £52,500 £51,600 £45,000
25th Percentile £57,500 £60,000 £51,250
Median annual salary (50th Percentile) £75,000 £70,000 £70,000
Median % change year-on-year +7.14% - -
75th Percentile £93,750 £85,000 £81,250
90th Percentile £108,750 £95,000 £97,500
Central London median annual salary £75,000 £71,000 £70,000
% change year-on-year +5.63% +1.43% -

Unix 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 854 1,063 2,406
As % of all permanent IT jobs advertised in the City of London 15.26% 20.43% 23.40%
Number of salaries quoted 750 943 2,140
10th Percentile £37,500 £32,500 £29,000
25th Percentile £50,313 £46,250 £43,438
Median annual salary (50th Percentile) £65,000 £65,000 £62,500
Median % change year-on-year - +4.00% +4.17%
75th Percentile £87,500 £77,500 £80,000
90th Percentile £100,000 £91,250 £95,000
Central London median annual salary £62,500 £65,000 £60,000
% change year-on-year -3.85% +8.33% +4.35%

Unix
Job Vacancy Trend in the City of London

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

Job vacancy trend for Unix in the City of London

Unix
Salary Trend in the City of London

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

Salary trend for Unix in the City of London

Unix
Salary Histogram in the City of London

Salary distribution for jobs citing Unix in the City of London over the 6 months to 3 August 2021.

Salary histogram for Unix in the City of London

For the 6 months to 3 August 2021, IT jobs citing Unix 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 Unix.

1 112 (75.17%) Linux
2 100 (67.11%) Finance
3 64 (42.95%) Python
4 58 (38.93%) Windows
5 53 (35.57%) Java
6 51 (34.23%) SQL
7 49 (32.89%) AWS
8 38 (25.50%) DevOps
9 30 (20.13%) Agile Software Development
10 29 (19.46%) Banking
11 28 (18.79%) Low Latency
12 27 (18.12%) SDLC
12 27 (18.12%) QA
12 27 (18.12%) Azure
13 23 (15.44%) Bash Shell
13 23 (15.44%) Multithreading
13 23 (15.44%) C++
13 23 (15.44%) Site Reliability Engineering
14 22 (14.77%) Docker
15 21 (14.09%) Ansible
15 21 (14.09%) Terraform
15 21 (14.09%) Advertising
15 21 (14.09%) Red Hat Enterprise Linux
16 19 (12.75%) SQL Server
16 19 (12.75%) OOD
16 19 (12.75%) Shell Script
16 19 (12.75%) Kubernetes
17 18 (12.08%) Automated Trading
17 18 (12.08%) Oracle
18 17 (11.41%) Data Warehouse

Unix
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 5 (3.36%) Elasticsearch
1 5 (3.36%) SAS
2 4 (2.68%) Apache Spark
3 3 (2.01%) Confluence
3 3 (2.01%) WebSphere
4 2 (1.34%) OpenStack
5 1 (0.67%) Appian
5 1 (0.67%) Oracle Workflow
Business Applications
1 3 (2.01%) Temenos T24
2 1 (0.67%) IntelliMatch
2 1 (0.67%) Oracle EBS
2 1 (0.67%) Oracle EBS R12
2 1 (0.67%) Salerio
2 1 (0.67%) SunGard Martini
2 1 (0.67%) Temenos Globus
Cloud Services
1 49 (32.89%) AWS
2 27 (18.12%) Azure
3 10 (6.71%) Amazon EC2
4 9 (6.04%) Amazon S3
4 9 (6.04%) AWS Lambda
4 9 (6.04%) Serverless
5 8 (5.37%) GCP
6 4 (2.68%) Snowflake
7 3 (2.01%) Azure Active Directory
7 3 (2.01%) IaaS
7 3 (2.01%) Microsoft 365
7 3 (2.01%) Power Platform
8 2 (1.34%) AWS CloudFormation
8 2 (1.34%) DigitalOcean
8 2 (1.34%) Linode
9 1 (0.67%) Collibra
9 1 (0.67%) GitHub
Communications & Networking
1 11 (7.38%) TCP/IP
2 4 (2.68%) SSH
3 3 (2.01%) Firewall
3 3 (2.01%) WAN
4 2 (1.34%) Internet
4 2 (1.34%) Intrusion Detection
4 2 (1.34%) LAN
4 2 (1.34%) Network Security
5 1 (0.67%) BGP
5 1 (0.67%) Cisco ASA
5 1 (0.67%) DNS
5 1 (0.67%) FTP
5 1 (0.67%) iSCSI
5 1 (0.67%) MPLS
5 1 (0.67%) Multicast
5 1 (0.67%) OSPF
5 1 (0.67%) tcpdump
5 1 (0.67%) VPN
5 1 (0.67%) Wireshark
Database & Business Intelligence
1 19 (12.75%) SQL Server
2 17 (11.41%) Data Warehouse
3 16 (10.74%) SQL Server Integration Services
3 16 (10.74%) SQL Server Reporting Services
4 12 (8.05%) KDB
5 9 (6.04%) Relational Database
6 7 (4.70%) Oracle Database
7 6 (4.03%) Apache Cassandra
7 6 (4.03%) MongoDB
8 5 (3.36%) Hadoop
9 3 (2.01%) Big Data
9 3 (2.01%) NoSQL
9 3 (2.01%) Power BI
10 2 (1.34%) Amazon Athena
10 2 (1.34%) Apache Hive
10 2 (1.34%) Blockchain
10 2 (1.34%) BusinessObjects
10 2 (1.34%) Impala
10 2 (1.34%) Pentaho
10 2 (1.34%) Star Schema
Development Applications
1 14 (9.40%) Git (software)
1 14 (9.40%) Jenkins
1 14 (9.40%) JIRA
2 12 (8.05%) Bitbucket
3 11 (7.38%) GitLab
4 10 (6.71%) Cucumber
4 10 (6.71%) REST Assured
4 10 (6.71%) Selenium
5 8 (5.37%) SoapUI
6 4 (2.68%) TeamCity
7 3 (2.01%) Octopus Deploy
8 1 (0.67%) LoadRunner
8 1 (0.67%) Oracle APEX
8 1 (0.67%) Oracle Forms
8 1 (0.67%) Sonatype Nexus
8 1 (0.67%) Toad
General
1 100 (67.11%) Finance
2 29 (19.46%) Banking
3 21 (14.09%) Advertising
4 17 (11.41%) Social Skills
5 15 (10.07%) Front Office
6 11 (7.38%) Investment Banking
7 8 (5.37%) Analytical Skills
8 4 (2.68%) Back Office
9 2 (1.34%) Financial Institution
9 2 (1.34%) Retail Banking
10 1 (0.67%) Retail
Job Titles
1 37 (24.83%) Developer
2 23 (15.44%) DevOps Engineer
3 21 (14.09%) Applications Support
4 18 (12.08%) Analyst
4 18 (12.08%) Senior Developer
5 16 (10.74%) Java Developer
6 15 (10.07%) Team Leader
7 12 (8.05%) Senior Java Developer
8 11 (7.38%) Automation Engineer
8 11 (7.38%) Senior DevOps
8 11 (7.38%) Senior DevOps Engineer
9 10 (6.71%) QA Automation Engineer
9 10 (6.71%) QA Engineer
10 9 (6.04%) Applications Support Analyst
10 9 (6.04%) Support Analyst
11 8 (5.37%) C++ Developer
11 8 (5.37%) Site Reliability Engineer
12 7 (4.70%) Application Support Team Leader
12 7 (4.70%) Support Team Leader
13 6 (4.03%) KDB Developer
Libraries, Frameworks & Software Standards
1 15 (10.07%) Elastic Stack
2 12 (8.05%) STL
3 11 (7.38%) FIX Protocol
3 11 (7.38%) Kafka
3 11 (7.38%) XML
4 10 (6.71%) .NET
4 10 (6.71%) Gherkin
5 8 (5.37%) Spring
6 5 (3.36%) JSON
7 3 (2.01%) RESTful
7 3 (2.01%) WebSphere MQ
8 2 (1.34%) ASP.NET
8 2 (1.34%) boto
8 2 (1.34%) Middleware
8 2 (1.34%) PySpark
8 2 (1.34%) XSLT
9 1 (0.67%) Flutter
9 1 (0.67%) GraphQL
9 1 (0.67%) React Native
9 1 (0.67%) Spring Boot
Miscellaneous
1 15 (10.07%) Fixed Income
2 12 (8.05%) Derivative
2 12 (8.05%) Greenfield Project
2 12 (8.05%) Spread Betting
3 6 (4.03%) Equities
3 6 (4.03%) Foreign Exchange (FX)
4 5 (3.36%) Data Structures
4 5 (3.36%) OTC Derivatives
5 4 (2.68%) Algorithms
5 4 (2.68%) SWIFT
6 3 (2.01%) Hedge funds
6 3 (2.01%) Management Information System
7 2 (1.34%) Data Centre
7 2 (1.34%) Enterprise Software
7 2 (1.34%) Exotic Derivative
7 2 (1.34%) Hybrid Cloud
7 2 (1.34%) Linux Command Line
7 2 (1.34%) PKI
7 2 (1.34%) Public Cloud
7 2 (1.34%) Replication
Operating Systems
1 112 (75.17%) Linux
2 58 (38.93%) Windows
3 21 (14.09%) Red Hat Enterprise Linux
4 14 (9.40%) CentOS
5 13 (8.72%) Ubuntu
6 6 (4.03%) Windows Server
7 1 (0.67%) Android
7 1 (0.67%) Apple iOS
7 1 (0.67%) Mac OS
7 1 (0.67%) Solaris
7 1 (0.67%) Windows 10
7 1 (0.67%) Windows 7
7 1 (0.67%) Windows Server 2008
Processes & Methodologies
1 38 (25.50%) DevOps
2 30 (20.13%) Agile Software Development
3 28 (18.79%) Low Latency
4 27 (18.12%) SDLC
5 23 (15.44%) Multithreading
5 23 (15.44%) Site Reliability Engineering
6 19 (12.75%) OOD
7 18 (12.08%) Automated Trading
8 17 (11.41%) Test Automation
9 14 (9.40%) Data Analysis
9 14 (9.40%) Electronic Trading
10 13 (8.72%) Clean Code
10 13 (8.72%) OOP
11 12 (8.05%) OO
11 12 (8.05%) Software Engineering
12 11 (7.38%) Configuration Management
12 11 (7.38%) Infrastructure as Code
12 11 (7.38%) ITIL
13 10 (6.71%) Data Modelling
14 9 (6.04%) Machine Learning
Programming Languages
1 64 (42.95%) Python
2 53 (35.57%) Java
3 51 (34.23%) SQL
4 23 (15.44%) Bash Shell
4 23 (15.44%) C++
5 19 (12.75%) Shell Script
6 16 (10.74%) C#
7 13 (8.72%) Perl
8 11 (7.38%) JavaScript
9 10 (6.71%) PowerShell
10 5 (3.36%) Scala
11 4 (2.68%) PL/SQL
12 2 (1.34%) Haskell
12 2 (1.34%) HiveQL
12 2 (1.34%) Kotlin
12 2 (1.34%) R
13 1 (0.67%) Go
13 1 (0.67%) Groovy
13 1 (0.67%) Java 8
13 1 (0.67%) T-SQL
Qualifications
1 4 (2.68%) ITIL Foundation Certificate
2 3 (2.01%) Degree
3 2 (1.34%) CISSP
3 2 (1.34%) GIAC
3 2 (1.34%) GPEN
4 1 (0.67%) BPSS Clearance
4 1 (0.67%) Computer Science Degree
4 1 (0.67%) SAS Certification
4 1 (0.67%) SC Cleared
4 1 (0.67%) Security Cleared
Quality Assurance & Compliance
1 27 (18.12%) QA
2 1 (0.67%) Data Quality
2 1 (0.67%) SLA
System Software
1 22 (14.77%) Docker
2 3 (2.01%) Active Directory
3 2 (1.34%) HDFS
3 2 (1.34%) Xen
Systems Management
1 21 (14.09%) Ansible
1 21 (14.09%) Terraform
2 19 (12.75%) Kubernetes
3 12 (8.05%) Puppet
4 7 (4.70%) Packer
5 6 (4.03%) Nagios
6 4 (2.68%) Opscode Chef
7 3 (2.01%) Docker Swarm
7 3 (2.01%) Grafana
7 3 (2.01%) NetBackup
7 3 (2.01%) Salt
8 2 (1.34%) Rundeck
9 1 (0.67%) Control-M
9 1 (0.67%) FortiGate
9 1 (0.67%) Graylog
9 1 (0.67%) nmon
9 1 (0.67%) Oracle Enterprise Manager
9 1 (0.67%) Prometheus
Vendors
1 18 (12.08%) Oracle
2 4 (2.68%) Google
2 4 (2.68%) Greenplum
2 4 (2.68%) IBM
2 4 (2.68%) Microsoft
2 4 (2.68%) Rapid7
2 4 (2.68%) Red Hat
3 3 (2.01%) Atlassian
3 3 (2.01%) Bloomberg
3 3 (2.01%) Cisco
3 3 (2.01%) Cloudera
3 3 (2.01%) Informatica
3 3 (2.01%) jBASE
3 3 (2.01%) Temenos
3 3 (2.01%) VMware
4 2 (1.34%) Intel
4 2 (1.34%) Sybase
4 2 (1.34%) Tradeweb
4 2 (1.34%) Veritas
4 2 (1.34%) Vertica