Period
to 19 April 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 19 April 2018 with a comparison to the same period in the previous 2 years.

Chai Assertion Library (Chai.js)
UK
6 months to
19 Apr 2018
Same period 2017 Same period 2016
Rank 955 1045 1211
Rank change year-on-year +90 +166 +79
Permanent jobs citing Chai 241 136 79
As % of all permanent IT jobs advertised in the UK 0.14% 0.079% 0.039%
As % of the Libraries, Frameworks & Software Standards category 0.33% 0.20% 0.100%
Number of salaries quoted 152 132 66
UK median annual salary £65,000 £55,000 £67,500
Median salary % change year-on-year +18.18% -18.52% +3.85%
10th Percentile £38,875 £40,000 £41,875
90th Percentile £83,625 £92,500 £97,500
UK excluding London median annual salary £47,500 £45,000 £45,000
% change year-on-year +5.56% - -33.33%

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 72,709 69,233 79,064
As % of all permanent IT jobs advertised in the UK 41.01% 40.25% 38.57%
Number of salaries quoted 61,373 59,245 68,055
UK median annual salary £50,000 £47,500 £47,304
Median salary % change year-on-year +5.26% +0.41% +5.12%
10th Percentile £30,500 £28,750 £28,500
90th Percentile £80,000 £76,250 £75,000
UK excluding London median annual salary £44,000 £42,500 £41,000
% change year-on-year +3.53% +3.66% +2.50%

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 April 2018.

Salary histogram for Chai in the UK

Chai
Top 12 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 April 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 +121 234 £65,000 +18.18% 65
London +118 192 £70,000 +16.67% 35
UK excluding London -22 48 £47,500 +5.56% 39
South East -32 19 £53,500 +18.89% 7
South West 0 9 £47,500 +26.67% 3
East of England -10 6 £58,750 +23.68% 4
Scotland -22 6 £35,000 - 6
North of England +5 4 £37,500 -12.79% 11
Midlands -2 4 £37,500 -16.67% 5
North West -17 4 £37,500 -27.18% 6
East Midlands +6 3 £37,500 -6.25% 2
West Midlands -18 1 £42,500 -5.56% 3

For the 6 months to 19 April 2018, IT 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 permanent job ads with a requirement for Chai.

1 240 (99.59%) Mocha
2 192 (79.67%) CSS
3 180 (74.69%) HTML
4 168 (69.71%) Git (software)
5 163 (67.63%) Amazon AWS
6 158 (65.56%) Node.js
7 157 (65.15%) Agile Software Development
8 144 (59.75%) JavaScript
9 134 (55.60%) Jest
10 130 (53.94%) TDD
11 126 (52.28%) HTML5
12 122 (50.62%) CSS3
13 119 (49.38%) ES6
14 108 (44.81%) BDD
15 107 (44.40%) SQL
16 106 (43.98%) Test Automation
16 106 (43.98%) DevOps
16 106 (43.98%) User Experience
17 104 (43.15%) React
17 104 (43.15%) AngularJS
18 103 (42.74%) NoSQL
19 102 (42.32%) Selenium
20 100 (41.49%) Microsoft Azure
21 98 (40.66%) GitHub
22 91 (37.76%) Docker
23 76 (31.54%) Enzyme
24 75 (31.12%) Karma Test Runner
25 74 (30.71%) Finance
26 73 (30.29%) Linux
27 72 (29.88%) Scrum

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 55 (22.82%) CMS
2 43 (17.84%) Ethereum
3 42 (17.43%) EPiServer
4 35 (14.52%) Confluence
5 34 (14.11%) Tomcat
6 33 (13.69%) Cloud Foundry
6 33 (13.69%) Mule
7 23 (9.54%) Sitecore CMS
8 9 (3.73%) Drupal
8 9 (3.73%) WordPress
9 3 (1.24%) Elasticsearch
10 2 (0.83%) IIS
11 1 (0.41%) JBoss
11 1 (0.41%) Mongoose
11 1 (0.41%) nginx
Business Applications
1 32 (13.28%) Distributed Ledger
2 23 (9.54%) Eloqua
Cloud Services
1 163 (67.63%) Amazon AWS
2 100 (41.49%) Microsoft Azure
3 98 (40.66%) GitHub
4 56 (23.24%) npm
5 49 (20.33%) Amazon EC2
6 44 (18.26%) Amazon S3
7 40 (16.60%) Cloud Computing
8 36 (14.94%) Slack
9 34 (14.11%) IaaS
10 33 (13.69%) PaaS
11 4 (1.66%) Amazon SQS
11 4 (1.66%) BrowserStack
11 4 (1.66%) Google Cloud Platform
11 4 (1.66%) Twilio
11 4 (1.66%) Yarn
12 3 (1.24%) SaaS
12 3 (1.24%) Sauce Labs
13 2 (0.83%) Heroku
13 2 (0.83%) NuGet
13 2 (0.83%) Serverless
Communications & Networking
1 22 (9.13%) HTTP
2 2 (0.83%) DNS
2 2 (0.83%) Internet
2 2 (0.83%) SSL
2 2 (0.83%) TCP/IP
3 1 (0.41%) SMS
Database & Business Intelligence
1 103 (42.74%) NoSQL
2 65 (26.97%) PostgreSQL
3 62 (25.73%) MySQL
4 59 (24.48%) Redis
5 54 (22.41%) MongoDB
6 53 (21.99%) Blockchain
7 42 (17.43%) SQL Server
8 40 (16.60%) Couchbase
9 6 (2.49%) Relational Database
10 2 (0.83%) Amazon DynamoDB
11 1 (0.41%) Apache Cassandra
11 1 (0.41%) Big Data
Development Applications
1 240 (99.59%) Mocha
2 168 (69.71%) Git (software)
3 102 (42.32%) Selenium
4 75 (31.12%) Karma Test Runner
5 71 (29.46%) Protractor
5 71 (29.46%) Sinon.JS
6 63 (26.14%) gulp
7 59 (24.48%) webpack
8 58 (24.07%) Jenkins
9 53 (21.99%) Babel
10 50 (20.75%) Jasmine
11 45 (18.67%) TeamCity
12 44 (18.26%) Octopus Deploy
13 41 (17.01%) JIRA
14 40 (16.60%) Bower
14 40 (16.60%) JUnit
14 40 (16.60%) Team Foundation Server
14 40 (16.60%) Visual Studio
15 37 (15.35%) Maven
16 34 (14.11%) SonarQube
General
1 74 (30.71%) Finance
2 70 (29.05%) Banking
3 44 (18.26%) Telecoms
4 30 (12.45%) Marketing
5 26 (10.79%) Advertising
6 16 (6.64%) Games
7 6 (2.49%) Retail
8 3 (1.24%) Publishing
9 2 (0.83%) Automotive
9 2 (0.83%) French Language
10 1 (0.41%) Law
Job Titles
1 187 (77.59%) Developer
2 46 (19.09%) JavaScript Developer
3 45 (18.67%) Node.js Developer
4 36 (14.94%) Senior Developer
5 34 (14.11%) Front End Developer (Client-Side Developer)
6 25 (10.37%) Full Stack Developer
7 23 (9.54%) Blockchain Developer
8 22 (9.13%) Digital Developer
9 20 (8.30%) C# Developer
10 17 (7.05%) .NET Developer
11 16 (6.64%) EPiServer Developer
12 14 (5.81%) Java Developer
12 14 (5.81%) Lead Developer
12 14 (5.81%) Technical Leader
13 13 (5.39%) Angular Developer
13 13 (5.39%) JavaScript Engineer
14 12 (4.98%) Senior Java Developer
15 10 (4.15%) Web Developer
16 9 (3.73%) Software Developer
16 9 (3.73%) Software Engineer
Libraries, Frameworks & Software Standards
1 192 (79.67%) CSS
2 180 (74.69%) HTML
3 158 (65.56%) Node.js
4 134 (55.60%) Jest
5 126 (52.28%) HTML5
6 122 (50.62%) CSS3
7 104 (43.15%) AngularJS
7 104 (43.15%) React
8 76 (31.54%) Enzyme
9 68 (28.22%) REST
10 66 (27.39%) Gherkin
11 64 (26.56%) Redux
12 63 (26.14%) Sass
13 54 (22.41%) Backbone.js
13 54 (22.41%) jQuery
14 52 (21.58%) Ember.js
14 52 (21.58%) LESS
14 52 (21.58%) Smart Contracts
15 50 (20.75%) RESTful
16 47 (19.50%) .NET
Miscellaneous
1 106 (43.98%) User Experience
2 43 (17.84%) Bitcoin
3 40 (16.60%) Cloud Native
4 34 (14.11%) Mobile App
5 28 (11.62%) Fintech
6 15 (6.22%) Computer Science
7 11 (4.56%) Algorithms
7 11 (4.56%) Data Structures
7 11 (4.56%) Linux Command Line
8 10 (4.15%) Online Gambling
9 9 (3.73%) Greenfield Project
10 7 (2.90%) Virtual Team
11 4 (1.66%) Tandem
12 3 (1.24%) Animation
12 3 (1.24%) Clustering
13 2 (0.83%) Derivative
13 2 (0.83%) Online Games
14 1 (0.41%) Blog
14 1 (0.41%) Client/Server
14 1 (0.41%) Self-Motivation
Operating Systems
1 73 (30.29%) Linux
2 40 (16.60%) VMS
3 5 (2.07%) Windows
4 2 (0.83%) Android
4 2 (0.83%) Apple iOS
Processes & Methodologies
1 157 (65.15%) Agile Software Development
2 130 (53.94%) TDD
3 108 (44.81%) BDD
4 106 (43.98%) DevOps
4 106 (43.98%) Test Automation
5 72 (29.88%) Scrum
6 70 (29.05%) Front End Development
7 68 (28.22%) MVC
8 63 (26.14%) Problem-Solving
9 62 (25.73%) Software Engineering
10 61 (25.31%) Kanban
10 61 (25.31%) Web Development
11 59 (24.48%) Responsive Web Design
12 55 (22.82%) Mobile First
13 54 (22.41%) Microservices
14 50 (20.75%) API Development
15 46 (19.09%) Analytics
15 46 (19.09%) API Design
15 46 (19.09%) Continuous Improvement
16 43 (17.84%) Web Application Development
Programming Languages
1 144 (59.75%) JavaScript
2 119 (49.38%) ES6
3 107 (44.40%) SQL
4 66 (27.39%) Java
5 40 (16.60%) Solidity
6 35 (14.52%) Java 8
7 21 (8.71%) C#
8 13 (5.39%) PHP
9 11 (4.56%) ES7
10 10 (4.15%) TypeScript
11 9 (3.73%) Ruby
12 7 (2.90%) Python
13 4 (1.66%) Clojure
13 4 (1.66%) Haskell
13 4 (1.66%) Lisp
13 4 (1.66%) PowerShell
14 1 (0.41%) Scala
Qualifications
1 64 (26.56%) Degree
2 41 (17.01%) SAFe Agilist
3 4 (1.66%) Computer Science Degree
4 3 (1.24%) SC Cleared
4 3 (1.24%) Security Cleared
5 2 (0.83%) A+ Certification
Quality Assurance & Compliance
1 9 (3.73%) QA
System Software
1 91 (37.76%) Docker
2 40 (16.60%) Virtual Machines
Systems Management
1 49 (20.33%) Kubernetes
2 42 (17.43%) Docker Swarm
3 3 (1.24%) Terraform
4 1 (0.41%) Opscode Chef
4 1 (0.41%) Packer
4 1 (0.41%) Puppet
Vendors
1 34 (14.11%) AppDynamics
1 34 (14.11%) Splunk
2 23 (9.54%) Marketo
2 23 (9.54%) Sitecore
3 14 (5.81%) Alias
4 4 (1.66%) Google
5 2 (0.83%) Rollbar
6 1 (0.41%) Alteryx
6 1 (0.41%) Cypress Semiconductor
6 1 (0.41%) hybris
6 1 (0.41%) IBM
6 1 (0.41%) New Relic
6 1 (0.41%) Tableau
6 1 (0.41%) Zend