Period
to 7 December 2019

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 6 months to 7 December 2019 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.

WebSockets
Central London > City of London
6 months to
7 Dec 2019
Same period 2018 Same period 2017
Rank 212 248 237
Rank change year-on-year +36 -11 -8
Contract jobs citing WebSockets 6 14 19
As % of all contract IT jobs advertised in the City of London 0.11% 0.20% 0.26%
As % of the Libraries, Frameworks & Software Standards category 0.30% 0.50% 0.69%
Number of daily rates quoted 6 11 17
City of London median daily rate £550 £500 £530
Median daily rate % change year-on-year +10.00% -5.66% +29.27%
10th Percentile £414 £400 £465
90th Percentile £675 £675 £625
Central London median daily rate £550 £500 £530
% change year-on-year +10.00% -5.66% +35.03%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

WebSockets is in the Software Libraries and Frameworks category. The following 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 technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
City of London
Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 1,993 2,819 2,736
As % of all contract IT jobs advertised in the City of London 35.31% 39.53% 37.96%
Number of daily rates quoted 1,628 2,355 2,306
City of London median daily rate £538 £525 £510
Median daily rate % change year-on-year +2.38% +2.94% +7.37%
10th Percentile £400 £406 £363
90th Percentile £675 £675 £675
Central London median daily rate £525 £525 £500
% change year-on-year - +5.00% +5.26%
Number of hourly rates quoted 3 3 10
City of London median hourly rate £52.00 £19.00 £22.99
Median hourly rate % change year-on-year +173.68% -17.36% -34.31%
10th Percentile £26.70 £14.90 £20.28
90th Percentile £63.10 £84.50 £33.75
Central London median hourly rate £43.50 £27.00 £21.50
% change year-on-year +61.11% +25.58% -38.57%

WebSockets
Job Vacancy Trend in the City of London

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

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 6 months to 7 December 2019.

Contractor daily rate histogram for WebSockets in the City of London

For the 6 months to 7 December 2019, IT contractor jobs citing WebSockets also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for WebSockets.

1 4 (66.67%) MySQL
1 4 (66.67%) Docker
2 3 (50.00%) Microservices
2 3 (50.00%) Fintech
2 3 (50.00%) Python
3 2 (33.33%) Java
3 2 (33.33%) JavaScript
3 2 (33.33%) HTTP
3 2 (33.33%) PostgreSQL
3 2 (33.33%) REST
3 2 (33.33%) API Design
3 2 (33.33%) ES6
3 2 (33.33%) GCP
3 2 (33.33%) Kubernetes
3 2 (33.33%) Redux
3 2 (33.33%) Greenfield Project
3 2 (33.33%) NoSQL
4 1 (16.67%) Node.js
4 1 (16.67%) HTML
4 1 (16.67%) Digital Currency
4 1 (16.67%) OpenFin
4 1 (16.67%) Jest
4 1 (16.67%) Enzyme
4 1 (16.67%) ES7
4 1 (16.67%) React
4 1 (16.67%) webpack
4 1 (16.67%) Presto
4 1 (16.67%) Flask
4 1 (16.67%) Functional Programming
4 1 (16.67%) User Experience

WebSockets
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:

Cloud Services
1 2 (33.33%) GCP
2 1 (16.67%) GitHub
Communications & Networking
1 2 (33.33%) HTTP
2 1 (16.67%) Broadband
2 1 (16.67%) Internet
Database & Business Intelligence
1 4 (66.67%) MySQL
2 2 (33.33%) NoSQL
2 2 (33.33%) PostgreSQL
3 1 (16.67%) Apache Hive
3 1 (16.67%) Blockchain
3 1 (16.67%) Hadoop
3 1 (16.67%) Presto
3 1 (16.67%) Redis
Development Applications
1 1 (16.67%) CircleCI
1 1 (16.67%) Cucumber
1 1 (16.67%) JIRA
1 1 (16.67%) Karma Test Runner
1 1 (16.67%) Mocha
1 1 (16.67%) Selenium
1 1 (16.67%) webpack
General
1 1 (16.67%) Banking
1 1 (16.67%) Finance
Job Titles
1 5 (83.33%) Developer
2 2 (33.33%) Python Developer
3 1 (16.67%) Django Developer
3 1 (16.67%) Full Stack Developer
3 1 (16.67%) Java Developer
3 1 (16.67%) JavaScript Developer
3 1 (16.67%) PHP Developer
3 1 (16.67%) Python/Django Developer
Libraries, Frameworks & Software Standards
1 2 (33.33%) Redux
1 2 (33.33%) REST
2 1 (16.67%) AngularJS
2 1 (16.67%) CSS
2 1 (16.67%) CSS3
2 1 (16.67%) D3.js
2 1 (16.67%) Django
2 1 (16.67%) Electron Framework
2 1 (16.67%) Flask
2 1 (16.67%) Highcharts JS
2 1 (16.67%) HTML
2 1 (16.67%) HTML5
2 1 (16.67%) React
2 1 (16.67%) RESTful
2 1 (16.67%) Spring
2 1 (16.67%) SVG
2 1 (16.67%) Symfony
2 1 (16.67%) Vue.js
2 1 (16.67%) Web Services
2 1 (16.67%) ZeroMQ
Miscellaneous
1 2 (33.33%) Greenfield Project
2 1 (16.67%) Digital Currency
2 1 (16.67%) User Experience
Processes & Methodologies
1 3 (50.00%) Fintech
1 3 (50.00%) Microservices
2 2 (33.33%) API Design
3 1 (16.67%) 3D Modelling
3 1 (16.67%) Artificial Intelligence
3 1 (16.67%) Cryptography
3 1 (16.67%) Functional Programming
3 1 (16.67%) Incident Management
3 1 (16.67%) Low Latency
3 1 (16.67%) OO
Programming Languages
1 3 (50.00%) Python
2 2 (33.33%) ES6
2 2 (33.33%) Java
2 2 (33.33%) JavaScript
3 1 (16.67%) ES7
3 1 (16.67%) Go
3 1 (16.67%) PHP
3 1 (16.67%) PHP 7
3 1 (16.67%) TypeScript
System Software
1 4 (66.67%) Docker
Systems Management
1 2 (33.33%) Kubernetes