Period
to 19 November 2017

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 19 November 2017 with a comparison to the same period in the previous 2 years.

Chai Assertion Library (Chai.js)
UK
6 months to
19 Nov 2017
Same period 2016 Same period 2015
Rank 1050 1150 1259
Rank change year-on-year +100 +109 +67
Permanent jobs citing Chai 148 68 49
As % of all permanent IT jobs advertised in the UK 0.083% 0.036% 0.022%
As % of the Libraries, Frameworks & Software Standards category 0.21% 0.092% 0.059%
Number of salaries quoted 110 61 41
UK median annual salary £60,000 £55,000 £52,500
Median salary % change year-on-year +9.09% +4.76% -12.50%
10th Percentile £36,250 £37,500 £37,500
90th Percentile £85,000 £78,750 £92,500
UK excluding London median annual salary £50,000 £43,750 £52,500
% change year-on-year +14.29% -16.67% -

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 71570 73527 82974
As % of all permanent IT jobs advertised in the UK 40.15% 38.97% 37.96%
Number of salaries quoted 59439 63800 70927
UK median annual salary £50,000 £47,500 £45,000
Median salary % change year-on-year +5.26% +5.56% +1.12%
10th Percentile £29,750 £28,750 £27,500
90th Percentile £77,500 £76,250 £73,750
UK excluding London median annual salary £42,500 £42,000 £40,000
% change year-on-year +1.19% +5.00% -

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 19 November 2017.

Salary histogram for Chai in the UK

Chai
Top 10 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 19 November 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
England +123 146 £60,000 +9.09% 10
London +87 130 £60,000 - 7
UK excluding London +40 18 £50,000 +14.29% 3
South East - 11 £50,000 - 1
South West +29 3 £37,500 -21.05%
Scotland -6 2 £35,000 -
Midlands +33 1 £60,000 -
East Midlands +32 1 £60,000 -
North of England -1 1 £34,000 +23.64%
North East - 1 £34,000 -

For the 6 months to 19 November 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 with a requirement for Chai.

1 147 (99.32%) Mocha
2 141 (95.27%) JavaScript
3 110 (74.32%) CSS
4 102 (68.92%) HTML
5 96 (64.86%) AngularJS
6 85 (57.43%) Agile Software Development
6 85 (57.43%) TDD
7 71 (47.97%) React
8 68 (45.95%) HTML5
9 63 (42.57%) Node.js
10 61 (41.22%) CSS3
11 54 (36.49%) Git (software)
11 54 (36.49%) Karma Test Runner
12 50 (33.78%) Jasmine
12 50 (33.78%) Sinon.JS
13 48 (32.43%) Sass
14 47 (31.76%) BDD
14 47 (31.76%) Selenium
14 47 (31.76%) Front End Development
15 45 (30.41%) Backbone.js
16 44 (29.73%) MVC
16 44 (29.73%) User Experience
17 43 (29.05%) Redux
17 43 (29.05%) Amazon AWS
18 42 (28.38%) ES6
19 41 (27.70%) gulp
20 40 (27.03%) SOLID
20 40 (27.03%) Test Automation
21 37 (25.00%) OO
21 37 (25.00%) Degree

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 23 (15.54%) CMS
2 18 (12.16%) EPiServer
3 14 (9.46%) Sitecore CMS
4 6 (4.05%) Confluence
4 6 (4.05%) nginx
5 3 (2.03%) Drupal
5 3 (2.03%) WordPress
6 2 (1.35%) Jetty
6 2 (1.35%) Mongoose
6 2 (1.35%) Tomcat
7 1 (0.68%) Cloud Foundry
7 1 (0.68%) ColdFusion
7 1 (0.68%) Ethereum
7 1 (0.68%) JBoss
Applications
1 1 (0.68%) HipChat
Business Applications
1 14 (9.46%) Eloqua
Cloud Services
1 43 (29.05%) Amazon AWS
2 34 (22.97%) Microsoft Azure
3 28 (18.92%) npm
4 9 (6.08%) GitHub
5 7 (4.73%) OpenShift
6 4 (2.70%) Google Cloud Platform
7 3 (2.03%) Amazon EC2
8 2 (1.35%) Amazon S3
8 2 (1.35%) Heroku
8 2 (1.35%) SaaS
9 1 (0.68%) Amazon Kinesis
9 1 (0.68%) AWS CloudTrail
9 1 (0.68%) AWS Lambda
9 1 (0.68%) Azure Active Directory
9 1 (0.68%) CloudFront
9 1 (0.68%) IaaS
9 1 (0.68%) Route 53
9 1 (0.68%) Serverless
9 1 (0.68%) Slack
9 1 (0.68%) Virtual Private Cloud
Communications & Networking
1 19 (12.84%) HTTP
Database & Business Intelligence
1 36 (24.32%) NoSQL
2 25 (16.89%) MongoDB
3 19 (12.84%) SQL Server
4 17 (11.49%) Couchbase
5 8 (5.41%) MySQL
5 8 (5.41%) Redis
6 4 (2.70%) PostgreSQL
6 4 (2.70%) Relational Database
7 3 (2.03%) OrientDB
8 2 (1.35%) Amazon DynamoDB
8 2 (1.35%) Blockchain
8 2 (1.35%) HDInsight
9 1 (0.68%) Big Data
9 1 (0.68%) DocumentDB
9 1 (0.68%) Hazelcast
Development Applications
1 147 (99.32%) Mocha
2 54 (36.49%) Git (software)
2 54 (36.49%) Karma Test Runner
3 50 (33.78%) Jasmine
3 50 (33.78%) Sinon.JS
4 47 (31.76%) Selenium
5 41 (27.70%) gulp
6 37 (25.00%) Protractor
7 35 (23.65%) webpack
8 26 (17.57%) TeamCity
9 24 (16.22%) Jenkins
10 23 (15.54%) Octopus Deploy
10 23 (15.54%) Team Foundation Server
11 22 (14.86%) Grunt
12 20 (13.51%) Bower
13 18 (12.16%) Visual Studio
14 12 (8.11%) QUnit
14 12 (8.11%) WebDriver
15 11 (7.43%) Babel
16 10 (6.76%) JIRA
General
1 26 (17.57%) Marketing
2 19 (12.84%) Retail
3 17 (11.49%) Advertising
3 17 (11.49%) Finance
4 7 (4.73%) Games
5 4 (2.70%) Banking
5 4 (2.70%) Legal
5 4 (2.70%) Retail Banking
5 4 (2.70%) Telecoms
6 3 (2.03%) Financial Institution
7 1 (0.68%) Back Office
7 1 (0.68%) Investment Banking
7 1 (0.68%) Pharmaceutical
Job Titles
1 112 (75.68%) Developer
2 51 (34.46%) JavaScript Developer
3 42 (28.38%) Front End Developer (Client-Side Developer)
4 24 (16.22%) Senior Developer
5 22 (14.86%) Angular Developer
6 16 (10.81%) Senior Front-End Developer
7 15 (10.14%) Node.js Developer
7 15 (10.14%) Web Developer
8 13 (8.78%) Software Engineer
9 12 (8.11%) Full Stack Developer
9 12 (8.11%) Lead Developer
9 12 (8.11%) Senior JavaScript Developer
10 11 (7.43%) JavaScript Engineer
11 9 (6.08%) Digital Developer
11 9 (6.08%) HTML Developer
12 7 (4.73%) .NET Developer
12 7 (4.73%) Lead .NET Developer
12 7 (4.73%) QA Engineer
12 7 (4.73%) UI Developer
13 6 (4.05%) QA Leader
Libraries, Frameworks & Software Standards
1 110 (74.32%) CSS
2 102 (68.92%) HTML
3 96 (64.86%) AngularJS
4 71 (47.97%) React
5 68 (45.95%) HTML5
6 63 (42.57%) Node.js
7 61 (41.22%) CSS3
8 48 (32.43%) Sass
9 45 (30.41%) Backbone.js
10 43 (29.05%) Redux
11 35 (23.65%) jQuery
12 33 (22.30%) .NET
12 33 (22.30%) LESS
12 33 (22.30%) RESTful
12 33 (22.30%) Twitter Bootstrap
13 28 (18.92%) Ember.js
14 25 (16.89%) Gherkin
14 25 (16.89%) Web Services
15 23 (15.54%) MEAN Stack
15 23 (15.54%) REST
Miscellaneous
1 44 (29.73%) User Experience
2 18 (12.16%) Cloud Native
2 18 (12.16%) Fintech
3 11 (7.43%) Computer Science
3 11 (7.43%) Tandem
3 11 (7.43%) Virtual Team
4 9 (6.08%) Greenfield Project
5 5 (3.38%) Client/Server
6 4 (2.70%) Equities
6 4 (2.70%) Fixed Income
6 4 (2.70%) Hedge funds
7 3 (2.03%) Algorithms
7 3 (2.03%) Data Structures
7 3 (2.03%) Mobile App
7 3 (2.03%) Online Gambling
7 3 (2.03%) Social Media
8 2 (1.35%) Animation
8 2 (1.35%) Online Games
9 1 (0.68%) Linux Command Line
9 1 (0.68%) Smartphone
Operating Systems
1 19 (12.84%) Windows
2 16 (10.81%) Linux
3 6 (4.05%) Apple iOS
4 4 (2.70%) Android
4 4 (2.70%) Mac OS X
5 2 (1.35%) Mac OS
Processes & Methodologies
1 85 (57.43%) Agile Software Development
1 85 (57.43%) TDD
2 47 (31.76%) BDD
2 47 (31.76%) Front End Development
3 44 (29.73%) MVC
4 40 (27.03%) SOLID
4 40 (27.03%) Test Automation
5 37 (25.00%) OO
6 36 (24.32%) Microservices
7 34 (22.97%) Responsive Web Design
8 33 (22.30%) Software Engineering
8 33 (22.30%) Web Development
9 29 (19.59%) DevOps
10 28 (18.92%) Scrum
11 26 (17.57%) Continuous Integration
12 25 (16.89%) SEO
13 24 (16.22%) Analytics
14 23 (15.54%) E-Commerce
15 22 (14.86%) Unit Testing
15 22 (14.86%) Workflow
Programming Languages
1 141 (95.27%) JavaScript
2 42 (28.38%) ES6
3 35 (23.65%) Java
3 35 (23.65%) SQL
4 20 (13.51%) TypeScript
5 15 (10.14%) PHP
6 12 (8.11%) C#
7 5 (3.38%) Apple Swift
7 5 (3.38%) Objective-C
8 4 (2.70%) PowerShell
8 4 (2.70%) Python
9 3 (2.03%) Scala
10 2 (1.35%) C
10 2 (1.35%) ECMAScript
10 2 (1.35%) Go
10 2 (1.35%) R
11 1 (0.68%) C++
11 1 (0.68%) Ruby
Qualifications
1 37 (25.00%) Degree
2 6 (4.05%) Computer Science Degree
Quality Assurance & Compliance
1 11 (7.43%) QA
2 2 (1.35%) GDPR
2 2 (1.35%) ISO/IEC 27001
System Software
1 24 (16.22%) Docker
2 4 (2.70%) Apache ZooKeeper
3 1 (0.68%) Virtual Machines
Systems Management
1 7 (4.73%) Kubernetes
2 2 (1.35%) Ansible
2 2 (1.35%) Terraform
Vendors
1 14 (9.46%) Marketo
1 14 (9.46%) Sitecore
2 6 (4.05%) Microsoft
3 4 (2.70%) Atlassian
3 4 (2.70%) Google
3 4 (2.70%) IBM
3 4 (2.70%) Twitter
3 4 (2.70%) Xamarin
4 2 (1.35%) Adthena
4 2 (1.35%) Canon
4 2 (1.35%) Databricks
5 1 (0.68%) hybris