Period
to 16 May 2021

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for Open Source skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited Open Source over the 6 months to 16 May 2021 with a comparison to the same period in the previous 2 years.

Open Source
Central London > City of London
6 months to
16 May 2021
Same period 2020 Same period 2019
Rank 122 106 111
Rank change year-on-year -16 +5 +13
Permanent jobs citing Open Source 112 209 276
As % of all permanent jobs advertised in the City of London 2.25% 2.87% 2.75%
As % of the Processes & Methodologies category 2.37% 3.05% 2.94%
Number of salaries quoted 81 166 261
10th Percentile £53,750 £47,500 £42,500
25th Percentile £57,500 £55,000 £57,500
Median annual salary (50th Percentile) £75,000 £70,000 £75,000
Median % change year-on-year +7.14% -6.67% +7.14%
75th Percentile £85,000 £104,063 £91,250
90th Percentile £100,000 £112,500 £110,000
Central London median annual salary £75,000 £71,250 £75,000
% change year-on-year +5.26% -5.00% +7.14%

Open Source is in the Processes and Methodologies 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 process or methodology skills.

All Process and Methodology Skills
City of London
Permanent vacancies with a requirement for process or methodology skills 4,724 6,862 9,385
As % of all permanent IT jobs advertised in the City of London 95.11% 94.26% 93.37%
Number of salaries quoted 4,212 6,011 8,401
10th Percentile £43,750 £40,750 £36,750
25th Percentile £55,000 £51,250 £50,000
Median annual salary (50th Percentile) £72,500 £67,500 £65,000
Median % change year-on-year +7.41% +3.85% +4.00%
75th Percentile £90,000 £85,000 £82,500
90th Percentile £107,500 £100,000 £97,500
Central London median annual salary £70,000 £67,500 £65,000
% change year-on-year +3.70% +3.85% +8.33%

Open Source
Job Vacancy Trend in the City of London

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

Job vacancy trend for Open Source in the City of London

Open Source
Salary Trend in the City of London

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

Salary trend for Open Source in the City of London

Open Source
Salary Histogram in the City of London

Salary distribution for jobs citing Open Source in the City of London over the 6 months to 16 May 2021.

Salary histogram for Open Source in the City of London

For the 6 months to 16 May 2021, IT jobs citing Open Source 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 Open Source.

1 67 (59.82%) Java
2 63 (56.25%) Agile Software Development
3 51 (45.54%) DevOps
4 49 (43.75%) Microservices
4 49 (43.75%) AWS
5 44 (39.29%) Hadoop
5 44 (39.29%) Apache Spark
6 42 (37.50%) Azure
7 41 (36.61%) SQL
8 40 (35.71%) Python
8 40 (35.71%) Big Data
9 39 (34.82%) Software Engineering
9 39 (34.82%) Docker
10 32 (28.57%) JavaScript
10 32 (28.57%) Kubernetes
10 32 (28.57%) Project Delivery
11 31 (27.68%) Git (software)
12 30 (26.79%) Continuous Integration
13 29 (25.89%) Amazon Redshift
14 28 (25.00%) React
15 27 (24.11%) AngularJS
15 27 (24.11%) Finance
15 27 (24.11%) GCP
15 27 (24.11%) Social Skills
16 26 (23.21%) Analytics
17 25 (22.32%) NoSQL
18 24 (21.43%) Data Engineering
19 23 (20.54%) BigQuery
19 23 (20.54%) Computer Science
20 22 (19.64%) RESTful

Open Source
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 44 (39.29%) Apache Spark
2 8 (7.14%) Anypoint
2 8 (7.14%) Apache
3 4 (3.57%) CMS
3 4 (3.57%) Red Hat Fuse
4 3 (2.68%) Confluence
4 3 (2.68%) GlassFish
4 3 (2.68%) JBoss
4 3 (2.68%) WebSphere
5 2 (1.79%) Elasticsearch
6 1 (0.89%) Apache Airflow
6 1 (0.89%) ejabberd
6 1 (0.89%) IIS
6 1 (0.89%) nginx
6 1 (0.89%) Tomcat
Applications
1 1 (0.89%) Spreadsheet
1 1 (0.89%) Zeplin
Business Applications
1 3 (2.68%) IBM Operational Decision Manager
2 2 (1.79%) Distributed Ledger
Cloud Services
1 49 (43.75%) AWS
2 42 (37.50%) Azure
3 27 (24.11%) GCP
4 9 (8.04%) iPaaS
5 6 (5.36%) GitHub
6 5 (4.46%) Cloud Computing
7 1 (0.89%) AtomSphere
7 1 (0.89%) Boomi
7 1 (0.89%) BrowserStack
7 1 (0.89%) Firebase
7 1 (0.89%) Google Analytics
7 1 (0.89%) npm
7 1 (0.89%) OpenShift
7 1 (0.89%) PaaS
7 1 (0.89%) Power Platform
7 1 (0.89%) SaaS
Communications & Networking
1 2 (1.79%) BGP
1 2 (1.79%) Internet
1 2 (1.79%) WebEx
2 1 (0.89%) Asterisk PBX
2 1 (0.89%) Diameter Protocol
2 1 (0.89%) Firewall
2 1 (0.89%) LAN
2 1 (0.89%) MPLS
2 1 (0.89%) OSPF
2 1 (0.89%) PBX
2 1 (0.89%) SNMP
2 1 (0.89%) TCP/IP
2 1 (0.89%) VPN
2 1 (0.89%) WAN
Database & Business Intelligence
1 44 (39.29%) Hadoop
2 40 (35.71%) Big Data
3 29 (25.89%) Amazon Redshift
4 25 (22.32%) NoSQL
5 23 (20.54%) BigQuery
6 17 (15.18%) Apache Hive
6 17 (15.18%) PostgreSQL
7 16 (14.29%) SQL Server
8 10 (8.93%) InfluxDB
9 9 (8.04%) MongoDB
10 8 (7.14%) Azure SQL Database
10 8 (7.14%) RDBMS
10 8 (7.14%) Relational Database
10 8 (7.14%) SQL Server 2012
10 8 (7.14%) SQL Server Analysis Services
10 8 (7.14%) SQL Server Integration Services
10 8 (7.14%) SQL Server Reporting Services
11 6 (5.36%) Data Warehouse
11 6 (5.36%) MySQL
12 4 (3.57%) Data Mining
Development Applications
1 31 (27.68%) Git (software)
2 16 (14.29%) Jenkins
3 9 (8.04%) GitLab
4 8 (7.14%) Octopus Deploy
5 4 (3.57%) Atlassian Bamboo
5 4 (3.57%) Visual Studio Team System
6 3 (2.68%) Apache Archiva
6 3 (2.68%) Artifactory
6 3 (2.68%) Bitbucket
6 3 (2.68%) JIRA
6 3 (2.68%) JUnit
6 3 (2.68%) Mockito
6 3 (2.68%) Sonatype Nexus
6 3 (2.68%) TeamCity
7 2 (1.79%) Gradle
7 2 (1.79%) Maven
7 2 (1.79%) SonarQube
8 1 (0.89%) Cypress.io
8 1 (0.89%) JMeter
8 1 (0.89%) Selenium
General
1 27 (24.11%) Finance
1 27 (24.11%) Social Skills
2 9 (8.04%) Banking
3 7 (6.25%) Analytical Skills
4 5 (4.46%) Marketing
5 3 (2.68%) Public Speaking
6 1 (0.89%) Games
6 1 (0.89%) Organisational Skills
6 1 (0.89%) Public Sector
Job Titles
1 35 (31.25%) Developer
2 29 (25.89%) Software Engineer
3 28 (25.00%) Java Engineer
4 24 (21.43%) Java Software Engineer
5 23 (20.54%) Big Data Engineer
5 23 (20.54%) Big Data Software Engineer
5 23 (20.54%) Data Analytics Engineer
6 21 (18.75%) Java Developer
7 10 (8.93%) Architect
8 8 (7.14%) DBA
8 8 (7.14%) Senior DBA
8 8 (7.14%) Senior SQL DBA
8 8 (7.14%) Senior SQL Server DBA
8 8 (7.14%) SQL DBA
8 8 (7.14%) SQL Server DBA
9 7 (6.25%) Senior Developer
10 6 (5.36%) Full Stack Developer
11 5 (4.46%) Cloud Engineer
11 5 (4.46%) Integration Architect
12 4 (3.57%) Solutions Architect
Libraries, Frameworks & Software Standards
1 28 (25.00%) React
2 27 (24.11%) AngularJS
3 22 (19.64%) RESTful
4 20 (17.86%) Node.js
5 19 (16.96%) HTML
6 18 (16.07%) CSS
7 16 (14.29%) HTML5
8 9 (8.04%) Spring
9 7 (6.25%) Apache Camel
9 7 (6.25%) Hibernate
10 6 (5.36%) Middleware
10 6 (5.36%) Vue.js
11 5 (4.46%) .NET
11 5 (4.46%) REST
11 5 (4.46%) Spring Boot
12 4 (3.57%) .NET Core
12 4 (3.57%) Entity Framework
12 4 (3.57%) OSGi
12 4 (3.57%) RAML
12 4 (3.57%) Velocity
Miscellaneous
1 9 (8.04%) Cloud Native
2 8 (7.14%) Clustering
3 7 (6.25%) Blog
3 7 (6.25%) Social Media
4 6 (5.36%) User Experience
5 5 (4.46%) Data Structures
6 4 (3.57%) Analytical Mindset
6 4 (3.57%) Enterprise Software
6 4 (3.57%) Foreign Exchange (FX)
7 2 (1.79%) Algorithms
7 2 (1.79%) Management Information System
7 2 (1.79%) Private Cloud
7 2 (1.79%) Video Conferencing
8 1 (0.89%) Data Centre
8 1 (0.89%) Hedge funds
8 1 (0.89%) Mobile App
8 1 (0.89%) NHS
8 1 (0.89%) Self-Motivation
8 1 (0.89%) Virtual Team
Operating Systems
1 11 (9.82%) Windows
2 7 (6.25%) Linux
3 3 (2.68%) Unix
4 2 (1.79%) Red Hat Enterprise Linux
5 1 (0.89%) Android
5 1 (0.89%) Apple iOS
5 1 (0.89%) CentOS
5 1 (0.89%) Debian
Processes & Methodologies
1 63 (56.25%) Agile Software Development
2 51 (45.54%) DevOps
3 49 (43.75%) Microservices
4 39 (34.82%) Software Engineering
5 32 (28.57%) Project Delivery
6 30 (26.79%) Continuous Integration
7 26 (23.21%) Analytics
8 24 (21.43%) Data Engineering
9 23 (20.54%) Computer Science
10 21 (18.75%) OO
11 20 (17.86%) Artificial Intelligence
12 19 (16.96%) Scrum
13 14 (12.50%) Configuration Management
13 14 (12.50%) ETL
13 14 (12.50%) Test Automation
14 12 (10.71%) Capacity Planning
14 12 (10.71%) Fintech
15 11 (9.82%) Migration
15 11 (9.82%) Service Delivery
16 10 (8.93%) High Availability
Programming Languages
1 67 (59.82%) Java
2 41 (36.61%) SQL
3 40 (35.71%) Python
4 32 (28.57%) JavaScript
5 19 (16.96%) PHP
6 18 (16.07%) TypeScript
7 17 (15.18%) C#
7 17 (15.18%) ES6
8 16 (14.29%) Kotlin
8 16 (14.29%) Scala
9 13 (11.61%) PowerShell
10 8 (7.14%) T-SQL
11 5 (4.46%) Bash Shell
11 5 (4.46%) Java 8
12 4 (3.57%) C
12 4 (3.57%) C++
13 3 (2.68%) Ruby
14 2 (1.79%) Go
14 2 (1.79%) Perl
15 1 (0.89%) VB.NET
Qualifications
1 21 (18.75%) Computer Science Degree
1 21 (18.75%) Degree
2 4 (3.57%) Master's Degree
3 2 (1.79%) CCNA
3 2 (1.79%) Cisco Certification
3 2 (1.79%) SC Cleared
3 2 (1.79%) Security Cleared
4 1 (0.89%) AWS Certification
4 1 (0.89%) RHCE
4 1 (0.89%) RHCSA
Quality Assurance & Compliance
1 2 (1.79%) Data Quality
1 2 (1.79%) QA
1 2 (1.79%) SLA
2 1 (0.89%) Cyber Essentials
2 1 (0.89%) GDPR
2 1 (0.89%) HMG Security Policy Framework
2 1 (0.89%) ISO/IEC 27001
2 1 (0.89%) NIST
2 1 (0.89%) PMO
System Software
1 39 (34.82%) Docker
2 10 (8.93%) VMware Infrastructure
3 1 (0.89%) HDFS
3 1 (0.89%) iptables
3 1 (0.89%) Kamailio
3 1 (0.89%) KVM
3 1 (0.89%) Postfix
3 1 (0.89%) QEMU
3 1 (0.89%) Virtual Servers
Systems Management
1 32 (28.57%) Kubernetes
2 14 (12.50%) Ansible
3 12 (10.71%) Grafana
3 12 (10.71%) Terraform
4 3 (2.68%) Opscode Chef
5 2 (1.79%) Cisco CUCM
5 2 (1.79%) Kibana
5 2 (1.79%) Prometheus
5 2 (1.79%) Puppet
6 1 (0.89%) Consul
6 1 (0.89%) Docker Swarm
6 1 (0.89%) FortiGate
6 1 (0.89%) Galera Cluster
6 1 (0.89%) Graphite
6 1 (0.89%) HAProxy
6 1 (0.89%) Packer
6 1 (0.89%) ZABBIX
Vendors
1 20 (17.86%) Microsoft
2 10 (8.93%) VMware
3 8 (7.14%) MuleSoft
4 6 (5.36%) Talend
5 5 (4.46%) Google
6 4 (3.57%) Adobe
6 4 (3.57%) Pega
6 4 (3.57%) Salesforce.com
7 3 (2.68%) Cisco
7 3 (2.68%) IBM
7 3 (2.68%) Oracle
8 2 (1.79%) CommVault
8 2 (1.79%) Verint
9 1 (0.89%) Cloudera
9 1 (0.89%) GENBAND
9 1 (0.89%) Juniper
9 1 (0.89%) Nortel
9 1 (0.89%) Percona
9 1 (0.89%) Red Hat
9 1 (0.89%) SonicWALL