Period
to 22 August 2018

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for Chai skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Chai over the 6 months to 22 August 2018 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.

Chai Assertion Library (Chai.js)
Central London > City of London
6 months to
22 Aug 2018
Same period 2017 Same period 2016
Rank 238 225 233
Rank change year-on-year -13 +8 +63
Contract jobs citing Chai 15 17 15
As % of all contract IT jobs advertised in the City of London 0.21% 0.26% 0.22%
As % of the Libraries, Frameworks & Software Standards category 0.54% 0.68% 0.64%
Number of daily rates quoted 12 13 8
City of London median daily rate £475 £500 £500
Median daily rate % change year-on-year -5.00% - -
10th Percentile £414 £369 £385
90th Percentile £600 £568 £554
Central London median daily rate £500 £513 £500
% change year-on-year -2.44% +2.50% +25.00%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

Chai 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 2,781 2,505 2,361
As % of all contract IT jobs advertised in the City of London 39.73% 37.78% 34.85%
Number of daily rates quoted 2,277 2,022 1,994
City of London median daily rate £525 £500 £475
Median daily rate % change year-on-year +5.00% +5.26% +2.70%
10th Percentile £375 £363 £322
90th Percentile £675 £650 £638
Central London median daily rate £525 £500 £450
% change year-on-year +5.00% +11.11% -
Number of hourly rates quoted 9 11 5
City of London median hourly rate £22.00 £24.49 £20.00
Median hourly rate % change year-on-year -10.15% +22.43% -32.47%
10th Percentile £19.76 £20.75 £16.69
90th Percentile £47.50 £29.62 £50.43
Central London median hourly rate £27.00 £24.36 £20.00
% change year-on-year +10.84% +21.80% -42.86%

Chai
Job Vacancy Trend in the City of London

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

Job vacancy trend for Chai in the City of London

Chai
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 Chai in the City of London.

Contractor daily rate trend for Chai in the City of London

Chai
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Chai in the City of London over the 6 months to 22 August 2018.

Contractor daily rate histogram for Chai in the City of London

For the 6 months to 22 August 2018, IT contractor jobs citing Chai 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 Chai.

1 12 (80.00%) JavaScript
2 11 (73.33%) Agile Software Development
2 11 (73.33%) Git (software)
2 11 (73.33%) Mocha
2 11 (73.33%) Node.js
3 7 (46.67%) AngularJS
3 7 (46.67%) Protractor
3 7 (46.67%) TDD
4 6 (40.00%) Cucumber
4 6 (40.00%) RESTful
4 6 (40.00%) Unit Testing
4 6 (40.00%) Redux
4 6 (40.00%) npm
4 6 (40.00%) Microservices
5 5 (33.33%) Jasmine
5 5 (33.33%) webpack
5 5 (33.33%) ES6
6 4 (26.67%) Babel
6 4 (26.67%) GraphQL
6 4 (26.67%) Gherkin
6 4 (26.67%) Jenkins
6 4 (26.67%) Twitter Bootstrap
6 4 (26.67%) React
6 4 (26.67%) Karma Test Runner
6 4 (26.67%) JIRA
6 4 (26.67%) SC Cleared
6 4 (26.67%) Security Cleared
6 4 (26.67%) AMQP
6 4 (26.67%) Test Automation
6 4 (26.67%) Microsoft Azure

Chai
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 4 (26.67%) Confluence
2 1 (6.67%) Cloud Foundry
2 1 (6.67%) Mule
2 1 (6.67%) Tomcat
Cloud Services
1 6 (40.00%) npm
2 4 (26.67%) Microsoft Azure
3 1 (6.67%) Amazon AWS
3 1 (6.67%) GitHub
3 1 (6.67%) IaaS
3 1 (6.67%) PaaS
3 1 (6.67%) Slack
Communications & Networking
1 4 (26.67%) AMQP
2 1 (6.67%) HTTP
Database & Business Intelligence
1 1 (6.67%) Big Data
Development Applications
1 11 (73.33%) Git (software)
1 11 (73.33%) Mocha
2 7 (46.67%) Protractor
3 6 (40.00%) Cucumber
4 5 (33.33%) Jasmine
4 5 (33.33%) webpack
5 4 (26.67%) Babel
5 4 (26.67%) Jenkins
5 4 (26.67%) JIRA
5 4 (26.67%) Karma Test Runner
6 3 (20.00%) Selenium
6 3 (20.00%) Sonatype Nexus
7 1 (6.67%) JUnit
7 1 (6.67%) Maven
7 1 (6.67%) SonarQube
General
1 3 (20.00%) Banking
1 3 (20.00%) Finance
Job Titles
1 15 (100.00%) Developer
2 3 (20.00%) Front End Developer (Client-Side Developer)
2 3 (20.00%) JavaScript Developer
2 3 (20.00%) React Developer
2 3 (20.00%) Senior Developer
2 3 (20.00%) Senior Front-End Developer
3 2 (13.33%) Full Stack Developer
3 2 (13.33%) Software Developer
4 1 (6.67%) .NET Developer
4 1 (6.67%) Developer in Test
4 1 (6.67%) Developer/Software Engineer
4 1 (6.67%) DV Cleared Java Developer
4 1 (6.67%) Java Developer
4 1 (6.67%) Open Source Developer
4 1 (6.67%) SC Cleared Java Developer
4 1 (6.67%) Software Engineer
Libraries, Frameworks & Software Standards
1 11 (73.33%) Node.js
2 7 (46.67%) AngularJS
3 6 (40.00%) Redux
3 6 (40.00%) RESTful
4 4 (26.67%) .NET
4 4 (26.67%) ASP.NET
4 4 (26.67%) Gherkin
4 4 (26.67%) GraphQL
4 4 (26.67%) RabbitMQ
4 4 (26.67%) React
4 4 (26.67%) Twitter Bootstrap
5 3 (20.00%) CSS
5 3 (20.00%) CSS3
5 3 (20.00%) HTML
5 3 (20.00%) HTML5
5 3 (20.00%) Jest
5 3 (20.00%) Web Services
6 2 (13.33%) Express
6 2 (13.33%) Spring
6 2 (13.33%) Spring Boot
Miscellaneous
1 3 (20.00%) Greenfield Project
2 2 (13.33%) Virtual Team
3 1 (6.67%) Fintech
3 1 (6.67%) Mobile App
3 1 (6.67%) User Experience
Operating Systems
1 1 (6.67%) Linux
1 1 (6.67%) Windows
Processes & Methodologies
1 11 (73.33%) Agile Software Development
2 7 (46.67%) TDD
3 6 (40.00%) Microservices
3 6 (40.00%) Unit Testing
4 4 (26.67%) MVC
4 4 (26.67%) MVVM
4 4 (26.67%) Open Source
4 4 (26.67%) Scrum
4 4 (26.67%) Test Automation
5 3 (20.00%) BDD
5 3 (20.00%) Front End Development
6 2 (13.33%) Change Management
6 2 (13.33%) Coaching
6 2 (13.33%) Mentoring
6 2 (13.33%) Open Source Development
6 2 (13.33%) Release Automation
6 2 (13.33%) Responsive Web Design
6 2 (13.33%) SDLC
6 2 (13.33%) Software Engineering
6 2 (13.33%) Web Design
Programming Languages
1 12 (80.00%) JavaScript
2 5 (33.33%) ES6
3 4 (26.67%) C#
3 4 (26.67%) PL/SQL
3 4 (26.67%) SQL
3 4 (26.67%) VB.NET
4 3 (20.00%) Java
5 1 (6.67%) Bash Shell
5 1 (6.67%) ES7
5 1 (6.67%) Java 8
5 1 (6.67%) Python
Qualifications
1 4 (26.67%) SC Cleared
1 4 (26.67%) Security Cleared
2 1 (6.67%) BPSS Clearance
2 1 (6.67%) DV Cleared
System Software
1 2 (13.33%) Docker
Systems Management
1 3 (20.00%) Docker Swarm
Vendors
1 1 (6.67%) AppDynamics
1 1 (6.67%) Splunk
1 1 (6.67%) VMware