Period
to 22 January 2018

The following table provides summary statistics for permanent job vacancies 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 22 January 2018 with a comparison to the same period in the previous 2 years.

Chai Assertion Library (Chai.js)
UK
6 months to
22 Jan 2018
Same period 2017 Same period 2016
Rank 1007 1111 1214
Rank change year-on-year +104 +103 +88
Permanent jobs citing Chai 160 68 68
As % of all permanent IT jobs advertised in the UK 0.092% 0.039% 0.033%
As % of the Libraries, Frameworks & Software Standards category 0.23% 0.099% 0.085%
Number of salaries quoted 114 66 60
UK median annual salary £60,000 £55,000 £55,000
Median salary % change year-on-year +9.09% - -16.98%
10th Percentile £39,500 £40,000 £39,750
90th Percentile £82,500 £75,000 £92,500
UK excluding London median annual salary £50,000 £40,000 £52,500
% change year-on-year +25.00% -23.81% -22.22%

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 with a requirement for technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
UK
Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 70,520 68,703 79,775
As % of all permanent IT jobs advertised in the UK 40.66% 39.36% 38.24%
Number of salaries quoted 59,208 59,369 68,450
UK median annual salary £50,000 £47,500 £45,000
Median salary % change year-on-year +5.26% +5.56% -
10th Percentile £30,000 £28,750 £28,000
90th Percentile £77,500 £77,500 £75,000
UK excluding London median annual salary £42,500 £42,500 £40,000
% change year-on-year - +6.25% -

Chai
Job Vacancy Trend

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

Job vacancy trend for Chai in the UK

Chai
Salary Trend

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

Salary trend for Chai in the UK

Chai
Salary Histogram

The salary distribution of IT jobs citing Chai over the 6 months to 22 January 2018.

Salary histogram for Chai in the UK

Chai
Top 11 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing Chai within the UK over the 6 months to 22 January 2018. 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
England +111 156 £60,000 +9.09% 38
London +80 134 £70,000 +21.74% 25
UK excluding London +7 26 £50,000 +25.00% 13
South East +16 7 £60,000 +33.33% 4
East of England +12 5 £57,500 +21.05% 3
South West -1 5 £47,500 - 6
East Midlands +15 4 £37,500 -37.50%
Midlands +5 4 £37,500 -6.25%
Scotland -35 4 £35,000 -
North of England -4 1 £34,000 -11.76%
North East -16 1 £34,000 -8.26%

For the 6 months to 22 January 2018, 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 with a requirement for Chai.

1 159 (99.38%) Mocha
2 134 (83.75%) JavaScript
3 123 (76.88%) CSS
4 116 (72.50%) HTML
5 98 (61.25%) Agile Software Development
6 96 (60.00%) TDD
7 88 (55.00%) AngularJS
8 83 (51.88%) Node.js
9 79 (49.38%) Git (software)
10 73 (45.63%) HTML5
11 69 (43.13%) Amazon AWS
12 65 (40.63%) Sinon.JS
13 64 (40.00%) React
14 62 (38.75%) CSS3
15 61 (38.13%) BDD
16 59 (36.88%) NoSQL
17 58 (36.25%) Selenium
17 58 (36.25%) Karma Test Runner
18 56 (35.00%) SQL
19 55 (34.38%) Test Automation
20 54 (33.75%) Microsoft Azure
21 53 (33.13%) webpack
22 52 (32.50%) ES6
23 51 (31.88%) MVC
24 50 (31.25%) Degree
24 50 (31.25%) Backbone.js
25 48 (30.00%) Sass
25 48 (30.00%) Protractor
25 48 (30.00%) Docker
26 45 (28.13%) Software Engineering

Chai
Co-occurring IT Skills 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 30 (18.75%) CMS
2 27 (16.88%) EPiServer
3 13 (8.13%) Ethereum
4 8 (5.00%) Sitecore CMS
5 7 (4.38%) Confluence
6 5 (3.13%) Drupal
6 5 (3.13%) WordPress
7 4 (2.50%) nginx
8 3 (1.88%) Tomcat
9 2 (1.25%) Cloud Foundry
9 2 (1.25%) Elasticsearch
9 2 (1.25%) Jetty
10 1 (0.63%) JBoss
10 1 (0.63%) Mongoose
10 1 (0.63%) Mule
Applications
1 1 (0.63%) HipChat
Business Applications
1 10 (6.25%) Distributed Ledger
2 8 (5.00%) Eloqua
Cloud Services
1 69 (43.13%) Amazon AWS
2 54 (33.75%) Microsoft Azure
3 37 (23.13%) npm
4 33 (20.63%) GitHub
5 18 (11.25%) Amazon EC2
6 14 (8.75%) Amazon S3
7 11 (6.88%) Cloud Computing
8 7 (4.38%) OpenShift
9 3 (1.88%) Google Cloud Platform
9 3 (1.88%) SaaS
9 3 (1.88%) Serverless
9 3 (1.88%) Slack
10 2 (1.25%) BrowserStack
10 2 (1.25%) Heroku
10 2 (1.25%) IaaS
11 1 (0.63%) Amazon Kinesis
11 1 (0.63%) AWS CloudTrail
11 1 (0.63%) AWS Lambda
11 1 (0.63%) Azure Active Directory
11 1 (0.63%) Virtual Private Cloud
Communications & Networking
1 19 (11.88%) HTTP
Database & Business Intelligence
1 59 (36.88%) NoSQL
2 43 (26.88%) MongoDB
3 27 (16.88%) Redis
3 27 (16.88%) SQL Server
4 26 (16.25%) MySQL
5 25 (15.63%) Couchbase
5 25 (15.63%) PostgreSQL
6 15 (9.38%) Blockchain
7 8 (5.00%) Relational Database
8 4 (2.50%) Amazon DynamoDB
9 3 (1.88%) OrientDB
10 2 (1.25%) Big Data
10 2 (1.25%) HDInsight
11 1 (0.63%) Apache Cassandra
11 1 (0.63%) Hazelcast
Development Applications
1 159 (99.38%) Mocha
2 79 (49.38%) Git (software)
3 65 (40.63%) Sinon.JS
4 58 (36.25%) Karma Test Runner
4 58 (36.25%) Selenium
5 53 (33.13%) webpack
6 48 (30.00%) Protractor
7 44 (27.50%) gulp
8 40 (25.00%) Jasmine
9 36 (22.50%) TeamCity
10 32 (20.00%) Octopus Deploy
11 30 (18.75%) Jenkins
12 27 (16.88%) Bower
12 27 (16.88%) Team Foundation Server
13 25 (15.63%) Visual Studio
14 19 (11.88%) Grunt
15 16 (10.00%) Babel
16 13 (8.13%) Cucumber
17 12 (7.50%) WebDriver
18 11 (6.88%) JIRA
General
1 22 (13.75%) Marketing
2 21 (13.13%) Finance
3 13 (8.13%) Advertising
3 13 (8.13%) Banking
4 12 (7.50%) Telecoms
5 11 (6.88%) Retail
6 9 (5.63%) Games
7 3 (1.88%) Retail Banking
8 2 (1.25%) Automotive
9 1 (0.63%) Investment Banking
9 1 (0.63%) Legal
9 1 (0.63%) Pharmaceutical
Job Titles
1 123 (76.88%) Developer
2 39 (24.38%) Front End Developer (Client-Side Developer)
2 39 (24.38%) JavaScript Developer
3 29 (18.13%) Senior Developer
4 25 (15.63%) Full Stack Developer
5 19 (11.88%) Node.js Developer
6 18 (11.25%) C# Developer
7 16 (10.00%) Digital Developer
7 16 (10.00%) Senior Front-End Developer
8 15 (9.38%) Web Developer
9 12 (7.50%) Angular Developer
9 12 (7.50%) JavaScript Engineer
9 12 (7.50%) Software Engineer
10 9 (5.63%) React Developer
11 8 (5.00%) Senior JavaScript Developer
11 8 (5.00%) UI Developer
12 7 (4.38%) Blockchain Developer
12 7 (4.38%) EPiServer Developer
12 7 (4.38%) HTML Developer
13 6 (3.75%) Senior Web Developer
Libraries, Frameworks & Software Standards
1 123 (76.88%) CSS
2 116 (72.50%) HTML
3 88 (55.00%) AngularJS
4 83 (51.88%) Node.js
5 73 (45.63%) HTML5
6 64 (40.00%) React
7 62 (38.75%) CSS3
8 50 (31.25%) Backbone.js
9 48 (30.00%) Sass
10 42 (26.25%) Gherkin
11 40 (25.00%) .NET
12 39 (24.38%) Jest
13 38 (23.75%) Redux
14 36 (22.50%) LESS
14 36 (22.50%) RESTful
15 32 (20.00%) jQuery
15 32 (20.00%) REST
16 29 (18.13%) Twitter Bootstrap
17 28 (17.50%) MEAN Stack
18 27 (16.88%) Ember.js
Miscellaneous
1 44 (27.50%) User Experience
2 28 (17.50%) Fintech
3 25 (15.63%) Cloud Native
4 12 (7.50%) Bitcoin
5 11 (6.88%) Computer Science
5 11 (6.88%) Virtual Team
6 9 (5.63%) Tandem
7 7 (4.38%) Algorithms
7 7 (4.38%) Data Structures
7 7 (4.38%) Greenfield Project
8 6 (3.75%) Online Gambling
9 5 (3.13%) Client/Server
10 4 (2.50%) Hedge funds
11 3 (1.88%) Mobile App
11 3 (1.88%) Social Media
12 2 (1.25%) Animation
12 2 (1.25%) Online Games
13 1 (0.63%) Equities
13 1 (0.63%) Fixed Income
13 1 (0.63%) Smartphone
Operating Systems
1 30 (18.75%) Linux
2 14 (8.75%) Windows
3 12 (7.50%) VMS
4 2 (1.25%) Android
4 2 (1.25%) Apple iOS
4 2 (1.25%) Mac OS
5 1 (0.63%) Mac OS X
Processes & Methodologies
1 98 (61.25%) Agile Software Development
2 96 (60.00%) TDD
3 61 (38.13%) BDD
4 55 (34.38%) Test Automation
5 51 (31.88%) MVC
6 45 (28.13%) Software Engineering
7 43 (26.88%) Microservices
7 43 (26.88%) Responsive Web Design
8 41 (25.63%) Front End Development
8 41 (25.63%) Web Development
9 38 (23.75%) DevOps
9 38 (23.75%) SOLID
10 34 (21.25%) OO
11 32 (20.00%) Continuous Integration
11 32 (20.00%) Scrum
12 29 (18.13%) Analytics
13 27 (16.88%) Continuous Improvement
14 26 (16.25%) Web Application Development
15 25 (15.63%) Performance Management
15 25 (15.63%) Refactoring
Programming Languages
1 134 (83.75%) JavaScript
2 56 (35.00%) SQL
3 52 (32.50%) ES6
4 38 (23.75%) Java
5 22 (13.75%) C#
6 18 (11.25%) PHP
7 12 (7.50%) Solidity
7 12 (7.50%) TypeScript
8 7 (4.38%) Python
9 6 (3.75%) ES7
9 6 (3.75%) PowerShell
10 3 (1.88%) Ruby
10 3 (1.88%) Scala
11 2 (1.25%) GraphQL
11 2 (1.25%) R
12 1 (0.63%) Apple Swift
12 1 (0.63%) C++
12 1 (0.63%) Go
12 1 (0.63%) Objective-C
Qualifications
1 50 (31.25%) Degree
2 4 (2.50%) Computer Science Degree
3 1 (0.63%) SC Cleared
3 1 (0.63%) Security Cleared
Quality Assurance & Compliance
1 10 (6.25%) QA
2 2 (1.25%) GDPR
2 2 (1.25%) ISO/IEC 27001
System Software
1 48 (30.00%) Docker
2 12 (7.50%) Virtual Machines
3 3 (1.88%) Apache ZooKeeper
Systems Management
1 21 (13.13%) Kubernetes
2 10 (6.25%) Docker Swarm
3 4 (2.50%) Terraform
4 2 (1.25%) Ansible
Vendors
1 8 (5.00%) Marketo
1 8 (5.00%) Sitecore
2 5 (3.13%) Alias
3 4 (2.50%) IBM
4 3 (1.88%) Google
4 3 (1.88%) Microsoft
4 3 (1.88%) Twitter
5 2 (1.25%) Adthena
5 2 (1.25%) AppDynamics
5 2 (1.25%) Canon
5 2 (1.25%) Databricks
5 2 (1.25%) Splunk
6 1 (0.63%) Alteryx
6 1 (0.63%) Atlassian
6 1 (0.63%) Tableau
6 1 (0.63%) Xamarin