The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for CQRS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited CQRS over the 3 months to 28 June 2017 with a comparison to the same period in the previous 2 years.

Command-Query Responsibility Segregation (also Command-Query Separation)
London / City of London
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 214 246 313
Rank change year-on-year +32 +67  
Permanent jobs citing CQRS 13 9 2
As % of all permanent IT jobs advertised in the City of London 0.25% 0.14% 0.020%
As % of the Processes & Methodologies category 0.28% 0.16% 0.022%
Number of salaries quoted 6 9 2
Median salary £67,500 £57,500 £61,250
Median salary % change year-on-year +17.39% -6.12%  
90% offered a salary of more than £62,500 £52,750 £55,125
10% offered a salary of more than £78,750 £64,000 £68,375
UK excluding London median salary £47,500 £45,000 £37,500
% change year-on-year +5.55% +20.00%  

CQRS is in the process and methodology 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 process and methodology skills.

Process & Methodology Skills
City of London
Permanent job vacancies with a requirement for process and methodology skills 4579 5771 9076
As % of all permanent IT job vacancies advertised in the City of London 89.10% 90.58% 89.21%
Number of salaries quoted 17094 23089 29776
Median salary £62,500 £60,500 £57,500
Median salary % change year-on-year +3.30% +5.21%  
90% offered a salary of more than £37,500 £37,500 £36,250
10% offered a salary of more than £90,000 £87,500 £87,500
UK excluding London median salary £45,000 £45,000 £43,000
% change year-on-year - +4.65%  

CQRS
Job Vacancy Trend in the City of London

Job postings citing CQRS as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for CQRS in the City of London

CQRS
Salary Trend in the City of London

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

Salary trend for CQRS in the City of London

For the 6 months to 28 June 2017, IT jobs citing CQRS 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 CQRS.

1 15 (88.24%) JavaScript
1 15 (88.24%) .NET
1 15 (88.24%) TDD
2 14 (82.35%) C#
3 12 (70.59%) REST
4 11 (64.71%) SOLID
4 11 (64.71%) Agile Software Development
5 10 (58.82%) HTML
5 10 (58.82%) SOA
5 10 (58.82%) Redux
6 9 (52.94%) Microservices
6 9 (52.94%) React
6 9 (52.94%) Node.js
6 9 (52.94%) Domain-Driven Design
7 8 (47.06%) Microsoft Azure
7 8 (47.06%) AngularJS
7 8 (47.06%) SQL Server
7 8 (47.06%) OO
7 8 (47.06%) Scrum
7 8 (47.06%) Continuous Integration
8 7 (41.18%) Business Analysis
8 7 (41.18%) CSS
8 7 (41.18%) SQL
8 7 (41.18%) Change Management
8 7 (41.18%) Azure SQL Database
8 7 (41.18%) User Stories
9 6 (35.29%) Enterprise Software
9 6 (35.29%) Amazon AWS
9 6 (35.29%) Software Engineering
10 5 (29.41%) Web Development

CQRS
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 2 (11.76%) Elasticsearch
Cloud Services
1 8 (47.06%) Microsoft Azure
2 6 (35.29%) Amazon AWS
3 5 (29.41%) Azure Active Directory
4 2 (11.76%) Azure Machine Learning
Communications & Networking
1 1 (5.88%) DNS
Database & Business Intelligence
1 8 (47.06%) SQL Server
2 7 (41.18%) Azure SQL Database
3 4 (23.53%) MongoDB
3 4 (23.53%) NoSQL
4 3 (17.65%) SQL Server 2012
5 2 (11.76%) Blockchain
5 2 (11.76%) DocumentDB
6 1 (5.88%) Couchbase
6 1 (5.88%) MySQL
6 1 (5.88%) Neo4j
Development Applications
1 3 (17.65%) Git (software)
1 3 (17.65%) TeamCity
2 2 (11.76%) JIRA
2 2 (11.76%) SpecFlow
2 2 (11.76%) Team Foundation Server
3 1 (5.88%) Jenkins
General
1 4 (23.53%) Finance
2 2 (11.76%) Financial Institution
2 2 (11.76%) Retail
3 1 (5.88%) Legal
3 1 (5.88%) Publishing
Job Titles
1 8 (47.06%) Developer
2 6 (35.29%) Architect
3 5 (29.41%) .NET Architect
3 5 (29.41%) .NET Solutions Architect
3 5 (29.41%) Solutions Architect
4 4 (23.53%) .NET Developer
5 3 (17.65%) Senior .NET Developer
5 3 (17.65%) Senior Developer
6 2 (11.76%) Analyst
6 2 (11.76%) Analyst Developer
6 2 (11.76%) C# Developer
6 2 (11.76%) Cloud Engineer
6 2 (11.76%) Principal Developer
6 2 (11.76%) Principal Engineer
6 2 (11.76%) Web Engineer
7 1 (5.88%) Full Stack Developer
7 1 (5.88%) Java Developer
7 1 (5.88%) Lead Developer
7 1 (5.88%) Technical Architect
Libraries, Frameworks & Software Standards
1 15 (88.24%) .NET
2 12 (70.59%) REST
3 10 (58.82%) HTML
3 10 (58.82%) Redux
4 9 (52.94%) Node.js
4 9 (52.94%) React
5 8 (47.06%) AngularJS
6 7 (41.18%) CSS
7 5 (29.41%) ASP.NET Web API
7 5 (29.41%) SOAP
7 5 (29.41%) Web Services
8 4 (23.53%) ASP.NET
9 3 (17.65%) .NET Core
9 3 (17.65%) ASP.NET MVC
10 2 (11.76%) ActiveMQ
10 2 (11.76%) CSS3
10 2 (11.76%) Entity Framework
10 2 (11.76%) HTML5
10 2 (11.76%) React Native
10 2 (11.76%) Spring
Miscellaneous
1 6 (35.29%) Enterprise Software
2 3 (17.65%) Computer Science
3 2 (11.76%) Equities
3 2 (11.76%) Fintech
3 2 (11.76%) Fixed Income
3 2 (11.76%) Management Information System
3 2 (11.76%) Mobile App
4 1 (5.88%) Algorithms
4 1 (5.88%) Public Cloud
Operating Systems
1 3 (17.65%) Windows
2 2 (11.76%) Android
2 2 (11.76%) Apple iOS
Processes & Methodologies
1 15 (88.24%) TDD
2 11 (64.71%) Agile Software Development
2 11 (64.71%) SOLID
3 10 (58.82%) SOA
4 9 (52.94%) Domain-Driven Design
4 9 (52.94%) Microservices
5 8 (47.06%) Continuous Integration
5 8 (47.06%) OO
5 8 (47.06%) Scrum
6 7 (41.18%) Business Analysis
6 7 (41.18%) Change Management
6 7 (41.18%) User Stories
7 6 (35.29%) Software Engineering
8 5 (29.41%) BDD
8 5 (29.41%) Configuration Management
8 5 (29.41%) Web Development
9 4 (23.53%) MVC
10 3 (17.65%) Asset Management
10 3 (17.65%) Continuous Improvement
10 3 (17.65%) E-Commerce
Programming Languages
1 15 (88.24%) JavaScript
2 14 (82.35%) C#
3 7 (41.18%) SQL
4 4 (23.53%) Java
5 2 (11.76%) Apple Swift
5 2 (11.76%) Objective-C
Qualifications
1 5 (29.41%) Degree
2 2 (11.76%) Computer Science Degree
2 2 (11.76%) ISEB
Quality Assurance & Compliance
1 3 (17.65%) QA
System Software
1 4 (23.53%) Docker
Systems Management
1 2 (11.76%) Kubernetes
2 1 (5.88%) Nagios
2 1 (5.88%) ZABBIX
Vendors
1 3 (17.65%) AppDynamics
1 3 (17.65%) New Relic
2 2 (11.76%) Atlassian
2 2 (11.76%) Cadence
2 2 (11.76%) Google
2 2 (11.76%) Xamarin
3 1 (5.88%) Splunk