The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for WebSockets skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited WebSockets over the 3 months to 27 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

3 months to
27 Mar 2017
Same period 2016 Same period 2015
WebSockets
London / City of London
Rank 146 154 190
Rank change year-on-year +8 +36  
Contract jobs citing WebSockets 9 4 4
As % of all contract IT jobs advertised in the City of London 0.30% 0.12% 0.077%
As % of the Libraries, Frameworks & Software Standards category 0.85% 0.37% 0.26%
Number of daily rates quoted 8 4 3
Median daily rate £565 £588 £520
Median daily rate % change year-on-year -3.82% +12.98%  
UK excluding London median daily rate £419 £338 £350
% change year-on-year +24.07% -3.57%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

WebSockets is in the industry standards, technical specifications and software library and framework skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
City of London
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 1057 1091 1552
As % of all contract IT job vacancies advertised in the City of London 35.06% 32.80% 30.01%
Number of daily rates quoted 876 918 1243
Median daily rate £475 £463 £425
Median daily rate % change year-on-year +2.70% +8.82%  
90% offered a daily rate of more than £338 £325 £315
10% offered a daily rate of more than £625 £600 £580
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 2 5 7
Median hourly rate £35.00 £55.00 £27.37
Median hourly rate % change year-on-year -36.36% +100.94%  
UK excluding London median hourly rate £40.50 £38.00 £36.00
% change year-on-year +6.57% +5.55%  

WebSockets
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing WebSockets as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for WebSockets in the City of London

WebSockets
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing WebSockets in the City of London.

Contractor daily rate trend for WebSockets in the City of London

WebSockets
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing WebSockets in the City of London over the 3 months to 27 March 2017.

Contractor daily rate histogram for WebSockets in the City of London

WebSockets
Top 30 Related IT Skills in the City of London

For the 6 months to 27 March 2017, IT contractor jobs citing WebSockets also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for WebSockets.

1 9 (69.23%) JavaScript
2 8 (61.54%) AngularJS
3 6 (46.15%) HTML
3 6 (46.15%) Java
3 6 (46.15%) Agile Software Development
4 5 (38.46%) TDD
4 5 (38.46%) Spring
4 5 (38.46%) Git (software)
4 5 (38.46%) HTML5
4 5 (38.46%) BDD
4 5 (38.46%) NoSQL
4 5 (38.46%) Node.js
5 4 (30.77%) Akka
5 4 (30.77%) ES6
5 4 (30.77%) REST
5 4 (30.77%) Finance
6 3 (23.08%) Pair Programming
6 3 (23.08%) Banking
6 3 (23.08%) Derivative
6 3 (23.08%) Degree
6 3 (23.08%) Continuous Integration
6 3 (23.08%) Computer Science
6 3 (23.08%) C#
6 3 (23.08%) .NET
6 3 (23.08%) CSS
6 3 (23.08%) Foreign Exchange (FX)
6 3 (23.08%) Front Office
6 3 (23.08%) Scrum
6 3 (23.08%) RabbitMQ
6 3 (23.08%) MongoDB

WebSockets
Top Related 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 (15.38%) Apache Spark
1 2 (15.38%) NServiceBus
Cloud Services
1 1 (7.69%) Amazon AWS
Communications & Networking
1 1 (7.69%) HTTP
Database & Business Intelligence
1 5 (38.46%) NoSQL
2 3 (23.08%) MongoDB
3 2 (15.38%) Apache Cassandra
3 2 (15.38%) Hadoop
3 2 (15.38%) Neo4j
3 2 (15.38%) Redis
4 1 (7.69%) KDB
4 1 (7.69%) PostgreSQL
4 1 (7.69%) Relational Database
Development Applications
1 5 (38.46%) Git (software)
2 3 (23.08%) webpack
3 2 (15.38%) SpecFlow
3 2 (15.38%) Subversion
4 1 (7.69%) Bower
4 1 (7.69%) git-flow
4 1 (7.69%) Grunt
4 1 (7.69%) Jasmine
4 1 (7.69%) Jenkins
4 1 (7.69%) JIRA
4 1 (7.69%) JUnit
4 1 (7.69%) Maven
4 1 (7.69%) Mockito
4 1 (7.69%) Protractor
4 1 (7.69%) Selenium
4 1 (7.69%) TeamCity
General
1 4 (30.77%) Finance
2 3 (23.08%) Banking
2 3 (23.08%) Front Office
3 1 (7.69%) Investment Banking
Job Titles
1 11 (84.62%) Developer
2 4 (30.77%) Full Stack Developer
3 3 (23.08%) JavaScript Developer
4 2 (15.38%) Angular Developer
4 2 (15.38%) Lead Developer
4 2 (15.38%) Scala Developer
4 2 (15.38%) Technical Developer
4 2 (15.38%) Technical Leader
5 1 (7.69%) .NET Developer
5 1 (7.69%) Agile Developer
5 1 (7.69%) C# .NET Developer
5 1 (7.69%) C# Developer
5 1 (7.69%) E-Commerce Engineer
5 1 (7.69%) Front Office Developer
5 1 (7.69%) HTML Developer
5 1 (7.69%) Java Developer
5 1 (7.69%) Senior Java Developer
5 1 (7.69%) Senior Test Engineer
5 1 (7.69%) Test Engineer
5 1 (7.69%) Web Developer
Libraries, Frameworks & Software Standards
1 8 (61.54%) AngularJS
2 6 (46.15%) HTML
3 5 (38.46%) HTML5
3 5 (38.46%) Node.js
3 5 (38.46%) Spring
4 4 (30.77%) Akka
4 4 (30.77%) REST
5 3 (23.08%) .NET
5 3 (23.08%) Angular 2
5 3 (23.08%) CSS
5 3 (23.08%) RabbitMQ
5 3 (23.08%) Redux
6 2 (15.38%) ASP.NET
6 2 (15.38%) CSS3
6 2 (15.38%) Kafka
6 2 (15.38%) Middleware
6 2 (15.38%) Reactive Extensions
6 2 (15.38%) Samza
6 2 (15.38%) SignalR
6 2 (15.38%) Spark Streaming
Miscellaneous
1 3 (23.08%) Computer Science
1 3 (23.08%) Derivative
1 3 (23.08%) Foreign Exchange (FX)
2 2 (15.38%) Fixed Income
2 2 (15.38%) Hedge funds
3 1 (7.69%) Equities
3 1 (7.69%) Fintech
3 1 (7.69%) User Experience
Operating Systems
1 1 (7.69%) Unix
Processes & Methodologies
1 6 (46.15%) Agile Software Development
2 5 (38.46%) BDD
2 5 (38.46%) TDD
3 3 (23.08%) Continuous Integration
3 3 (23.08%) Pair Programming
3 3 (23.08%) Scrum
4 2 (15.38%) Automated Testing
4 2 (15.38%) Complex Event Processing
4 2 (15.38%) CQRS
4 2 (15.38%) Electronic Trading
4 2 (15.38%) Front End Development
4 2 (15.38%) OO
4 2 (15.38%) OOP
4 2 (15.38%) Open Source
4 2 (15.38%) Release Management
4 2 (15.38%) Web Application Development
4 2 (15.38%) Workflow
5 1 (7.69%) API Design
5 1 (7.69%) DevOps
5 1 (7.69%) Mentoring
Programming Languages
1 9 (69.23%) JavaScript
2 6 (46.15%) Java
3 4 (30.77%) ES6
4 3 (23.08%) C#
5 2 (15.38%) Scala
5 2 (15.38%) SQL
6 1 (7.69%) C++
6 1 (7.69%) Go
6 1 (7.69%) PHP
6 1 (7.69%) Python
Qualifications
1 3 (23.08%) Degree
Quality Assurance & Compliance
1 2 (15.38%) MiFID
System Software
1 2 (15.38%) HDFS
2 1 (7.69%) Docker
Systems Management
1 1 (7.69%) Opscode Chef
1 1 (7.69%) Puppet
Vendors
1 1 (7.69%) Atlassian