Period
to 16 December 2017

The following table provides summary statistics for permanent job vacancies advertised in England with a requirement for Chai skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited Chai over the 6 months to 16 December 2017 with a comparison to the same period in the previous 2 years.

Chai Assertion Library (Chai.js)
UK > England
6 months to
16 Dec 2017
Same period 2016 Same period 2015
Rank 1009 1124 1218
Rank change year-on-year +115 +94 +60
Permanent jobs citing Chai 152 63 52
As % of all permanent IT jobs advertised in England 0.091% 0.036% 0.026%
As % of the Libraries, Frameworks & Software Standards category 0.23% 0.092% 0.067%
Number of salaries quoted 118 58 45
England median annual salary £60,000 £55,000 £52,500
Median salary % change year-on-year +9.09% +4.76% -12.50%
10th Percentile £41,250 £40,875 £41,250
90th Percentile £83,750 £79,000 £92,500
UK median annual salary £60,000 £55,000 £52,500
% change year-on-year +9.09% +4.76% -12.50%

Chai is in the Software Libraries and Frameworks category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in England with a requirement for technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
England
Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 67222 68551 77150
As % of all permanent IT jobs advertised in England 40.28% 39.19% 38.14%
Number of salaries quoted 56445 59764 66803
England median annual salary £50,000 £47,500 £45,000
Median salary % change year-on-year +5.26% +5.56% -
10th Percentile £30,000 £29,000 £28,000
90th Percentile £78,750 £77,500 £75,000
UK median annual salary £50,000 £47,500 £45,000
% change year-on-year +5.26% +5.56% +2.27%

Chai
Job Vacancy Trend in England

Job postings citing Chai as a percentage of all IT jobs advertised in England.

Job vacancy trend for Chai in England

Chai
Salary Trend in England

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing Chai in England.

Salary trend for Chai in England

Chai
Salary Histogram in England

The salary distribution of IT jobs citing Chai in England over the 6 months to 16 December 2017.

Salary histogram for Chai in England

Chai
Job Locations in England

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing Chai within the England region over the 6 months to 16 December 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
London +100 134 £65,000 +13.04% 12
South East - 7 £60,000 - 1
Midlands +35 4 £37,500 -37.50%
East Midlands +18 4 £37,500 -37.50%
South West +9 3 £37,500 -21.05% 2
East of England +9 3 £57,500 +21.05%
North of England -7 1 £34,000 -8.26% 1
North East -7 1 £34,000 -8.26%
Chai
UK

For the 6 months to 16 December 2017, IT jobs citing Chai 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 England region with a requirement for Chai.

1 151 (99.34%) Mocha
2 140 (92.11%) JavaScript
3 117 (76.97%) CSS
4 109 (71.71%) HTML
5 91 (59.87%) TDD
6 89 (58.55%) Agile Software Development
7 87 (57.24%) AngularJS
8 72 (47.37%) React
9 70 (46.05%) HTML5
10 65 (42.76%) Node.js
11 61 (40.13%) CSS3
12 59 (38.82%) Git (software)
13 54 (35.53%) Sinon.JS
14 53 (34.87%) Karma Test Runner
15 50 (32.89%) Test Automation
15 50 (32.89%) Selenium
16 49 (32.24%) BDD
17 48 (31.58%) Jasmine
18 47 (30.92%) Sass
18 47 (30.92%) Amazon AWS
19 45 (29.61%) MVC
19 45 (29.61%) ES6
20 44 (28.95%) Front End Development
20 44 (28.95%) User Experience
20 44 (28.95%) Backbone.js
21 43 (28.29%) NoSQL
22 42 (27.63%) SQL
22 42 (27.63%) SOLID
22 42 (27.63%) Redux
23 41 (26.97%) webpack

Chai
Co-occurring IT Skills in England 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 21 (13.82%) CMS
2 18 (11.84%) EPiServer
3 10 (6.58%) Sitecore CMS
4 7 (4.61%) Ethereum
5 5 (3.29%) Confluence
6 4 (2.63%) nginx
7 3 (1.97%) Drupal
7 3 (1.97%) WordPress
8 2 (1.32%) Jetty
9 1 (0.66%) Cloud Foundry
9 1 (0.66%) Mongoose
9 1 (0.66%) Tomcat
Applications
1 1 (0.66%) HipChat
Business Applications
1 10 (6.58%) Eloqua
Cloud Services
1 47 (30.92%) Amazon AWS
2 40 (26.32%) Microsoft Azure
3 28 (18.42%) npm
4 18 (11.84%) GitHub
5 9 (5.92%) Amazon EC2
6 8 (5.26%) Amazon S3
7 7 (4.61%) OpenShift
8 6 (3.95%) Cloud Computing
9 3 (1.97%) Google Cloud Platform
9 3 (1.97%) SaaS
10 2 (1.32%) Heroku
11 1 (0.66%) Amazon Kinesis
11 1 (0.66%) AWS CloudTrail
11 1 (0.66%) AWS Lambda
11 1 (0.66%) Azure Active Directory
11 1 (0.66%) BrowserStack
11 1 (0.66%) CloudFront
11 1 (0.66%) Route 53
11 1 (0.66%) Slack
11 1 (0.66%) Virtual Private Cloud
Communications & Networking
1 19 (12.50%) HTTP
Database & Business Intelligence
1 43 (28.29%) NoSQL
2 26 (17.11%) MongoDB
3 18 (11.84%) SQL Server
4 17 (11.18%) Couchbase
5 16 (10.53%) MySQL
5 16 (10.53%) Redis
6 13 (8.55%) PostgreSQL
7 8 (5.26%) Blockchain
8 6 (3.95%) Relational Database
9 4 (2.63%) Amazon DynamoDB
10 3 (1.97%) OrientDB
11 2 (1.32%) Big Data
11 2 (1.32%) HDInsight
12 1 (0.66%) Hazelcast
Development Applications
1 151 (99.34%) Mocha
2 59 (38.82%) Git (software)
3 54 (35.53%) Sinon.JS
4 53 (34.87%) Karma Test Runner
5 50 (32.89%) Selenium
6 48 (31.58%) Jasmine
7 41 (26.97%) webpack
8 40 (26.32%) Protractor
9 38 (25.00%) gulp
10 28 (18.42%) TeamCity
11 27 (17.76%) Jenkins
12 25 (16.45%) Octopus Deploy
13 22 (14.47%) Team Foundation Server
14 20 (13.16%) Bower
14 20 (13.16%) Grunt
15 18 (11.84%) Visual Studio
16 14 (9.21%) WebDriver
17 13 (8.55%) QUnit
18 12 (7.89%) Cucumber
19 9 (5.92%) JIRA
General
1 25 (16.45%) Marketing
2 17 (11.18%) Finance
3 15 (9.87%) Retail
4 12 (7.89%) Advertising
5 9 (5.92%) Games
5 9 (5.92%) Telecoms
6 8 (5.26%) Banking
7 4 (2.63%) Retail Banking
8 3 (1.97%) Legal
9 2 (1.32%) Automotive
10 1 (0.66%) Investment Banking
10 1 (0.66%) Pharmaceutical
Job Titles
1 116 (76.32%) Developer
2 47 (30.92%) JavaScript Developer
3 42 (27.63%) Front End Developer (Client-Side Developer)
4 29 (19.08%) Senior Developer
5 18 (11.84%) Full Stack Developer
6 17 (11.18%) Angular Developer
6 17 (11.18%) Senior Front-End Developer
6 17 (11.18%) Web Developer
7 15 (9.87%) Node.js Developer
8 12 (7.89%) Software Engineer
9 11 (7.24%) JavaScript Engineer
9 11 (7.24%) Senior JavaScript Developer
10 9 (5.92%) C# Developer
10 9 (5.92%) Digital Developer
10 9 (5.92%) HTML Developer
10 9 (5.92%) Lead Developer
11 8 (5.26%) UI Developer
12 6 (3.95%) Front End Web Developer (Client-Side Developer)
12 6 (3.95%) Senior Web Developer
13 5 (3.29%) .NET Developer
Libraries, Frameworks & Software Standards
1 117 (76.97%) CSS
2 109 (71.71%) HTML
3 87 (57.24%) AngularJS
4 72 (47.37%) React
5 70 (46.05%) HTML5
6 65 (42.76%) Node.js
7 61 (40.13%) CSS3
8 47 (30.92%) Sass
9 44 (28.95%) Backbone.js
10 42 (27.63%) Redux
11 33 (21.71%) .NET
11 33 (21.71%) LESS
12 31 (20.39%) Gherkin
13 29 (19.08%) jQuery
13 29 (19.08%) RESTful
14 28 (18.42%) Twitter Bootstrap
15 26 (17.11%) Jest
16 25 (16.45%) REST
17 24 (15.79%) Web Services
18 22 (14.47%) Ember.js
Miscellaneous
1 44 (28.95%) User Experience
2 23 (15.13%) Fintech
3 18 (11.84%) Cloud Native
4 11 (7.24%) Greenfield Project
4 11 (7.24%) Tandem
4 11 (7.24%) Virtual Team
5 10 (6.58%) Computer Science
6 6 (3.95%) Bitcoin
7 5 (3.29%) Algorithms
7 5 (3.29%) Client/Server
7 5 (3.29%) Data Structures
7 5 (3.29%) Online Gambling
8 4 (2.63%) Hedge funds
9 3 (1.97%) Mobile App
9 3 (1.97%) Social Media
10 2 (1.32%) Animation
10 2 (1.32%) Online Games
11 1 (0.66%) Equities
11 1 (0.66%) Fixed Income
11 1 (0.66%) Smartphone
Operating Systems
1 22 (14.47%) Linux
2 18 (11.84%) Windows
3 6 (3.95%) VMS
4 4 (2.63%) Apple iOS
5 3 (1.97%) Android
5 3 (1.97%) Mac OS X
6 2 (1.32%) Mac OS
Processes & Methodologies
1 91 (59.87%) TDD
2 89 (58.55%) Agile Software Development
3 50 (32.89%) Test Automation
4 49 (32.24%) BDD
5 45 (29.61%) MVC
6 44 (28.95%) Front End Development
7 42 (27.63%) SOLID
8 39 (25.66%) Web Development
9 37 (24.34%) OO
9 37 (24.34%) Responsive Web Design
10 36 (23.68%) Microservices
11 34 (22.37%) Software Engineering
12 28 (18.42%) Continuous Integration
12 28 (18.42%) DevOps
12 28 (18.42%) Scrum
13 26 (17.11%) Analytics
14 25 (16.45%) Unit Testing
15 22 (14.47%) SEO
16 19 (12.50%) Web Application Development
17 18 (11.84%) Application Performance Management
Programming Languages
1 140 (92.11%) JavaScript
2 45 (29.61%) ES6
3 42 (27.63%) SQL
4 36 (23.68%) Java
5 21 (13.82%) TypeScript
6 15 (9.87%) PHP
7 13 (8.55%) C#
8 6 (3.95%) PowerShell
8 6 (3.95%) Solidity
9 5 (3.29%) Python
10 4 (2.63%) Apple Swift
10 4 (2.63%) Objective-C
11 3 (1.97%) Ruby
11 3 (1.97%) Scala
12 2 (1.32%) C
12 2 (1.32%) ECMAScript
12 2 (1.32%) R
13 1 (0.66%) C++
13 1 (0.66%) Go
Qualifications
1 36 (23.68%) Degree
2 5 (3.29%) Computer Science Degree
Quality Assurance & Compliance
1 12 (7.89%) QA
2 2 (1.32%) GDPR
2 2 (1.32%) ISO/IEC 27001
System Software
1 31 (20.39%) Docker
2 7 (4.61%) Virtual Machines
3 4 (2.63%) Apache ZooKeeper
Systems Management
1 12 (7.89%) Kubernetes
2 5 (3.29%) Docker Swarm
3 2 (1.32%) Ansible
3 2 (1.32%) Terraform
Vendors
1 10 (6.58%) Marketo
1 10 (6.58%) Sitecore
2 5 (3.29%) Microsoft
3 4 (2.63%) IBM
4 3 (1.97%) Atlassian
4 3 (1.97%) Google
4 3 (1.97%) Twitter
4 3 (1.97%) Xamarin
5 2 (1.32%) Adthena
5 2 (1.32%) Canon
5 2 (1.32%) Databricks