Period
to 17 October 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 17 October 2018 with a comparison to the same period in the previous 2 years.

Chai Assertion Library (Chai.js)
UK
6 months to
17 Oct 2018
Same period 2017 Same period 2016
Rank 881 1023 1173
Rank change year-on-year +142 +150 +92
Permanent jobs citing Chai 283 166 79
As % of all permanent IT jobs advertised in the UK 0.17% 0.095% 0.041%
As % of the Libraries, Frameworks & Software Standards category 0.43% 0.24% 0.11%
Number of salaries quoted 158 122 71
UK median annual salary £75,000 £60,000 £60,000
Median salary % change year-on-year +25.00% - +14.29%
10th Percentile £43,375 £36,250 £41,250
90th Percentile £92,500 £85,000 £95,000
UK excluding London median annual salary £52,500 £50,000 £43,750
% change year-on-year +5.00% +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 65,720 70,346 74,850
As % of all permanent IT jobs advertised in the UK 39.96% 40.17% 39.01%
Number of salaries quoted 54,337 58,196 64,845
UK median annual salary £50,500 £50,000 £47,500
Median salary % change year-on-year +1.00% +5.26% +5.56%
10th Percentile £31,250 £29,750 £28,750
90th Percentile £82,500 £77,500 £76,250
UK excluding London median annual salary £45,000 £42,500 £41,500
% change year-on-year +5.88% +2.41% +3.75%

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 17 October 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 17 October 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 +164 280 £75,000 +25.00% 38
London +142 240 £75,000 +15.38% 25
UK excluding London +34 40 £52,500 +5.00% 15
North of England +43 22 £48,500 +4.30% 6
North West +24 18 £48,500 -17.80% 5
South East -13 12 £60,000 +20.00% 2
Midlands +29 3 £28,500 -52.50% 3
Yorkshire - 3 £56,250 - 1
West Midlands - 3 £28,500 - 3
South West +9 2 £71,250 +90.00%
North East -7 1 - -
East of England - 1 £47,500 - 2

For the 6 months to 17 October 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.

1 276 (97.53%) Mocha
2 217 (76.68%) JavaScript
3 216 (76.33%) CSS
4 210 (74.20%) Git (software)
5 189 (66.78%) HTML
6 185 (65.37%) TDD
7 184 (65.02%) Amazon AWS
8 183 (64.66%) AngularJS
9 182 (64.31%) Agile Software Development
10 160 (56.54%) HTML5
11 158 (55.83%) CSS3
12 155 (54.77%) Karma Test Runner
13 154 (54.42%) gulp
14 151 (53.36%) npm
15 150 (53.00%) NoSQL
16 149 (52.65%) BDD
17 146 (51.59%) Sass
18 144 (50.88%) Microsoft Azure
18 144 (50.88%) SQL
19 142 (50.18%) Selenium
20 134 (47.35%) DevOps
21 133 (47.00%) LESS
22 131 (46.29%) Node.js
23 126 (44.52%) Problem-Solving
24 121 (42.76%) Jest
25 119 (42.05%) Protractor
26 116 (40.99%) webpack
27 114 (40.28%) RESTful
28 110 (38.87%) Sinon.JS
28 110 (38.87%) 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
1 100 (35.34%) CMS
2 94 (33.22%) EPiServer
3 44 (15.55%) Sitecore CMS
4 43 (15.19%) Ethereum
5 17 (6.01%) Confluence
6 15 (5.30%) Cloud Foundry
6 15 (5.30%) Mule
6 15 (5.30%) Tomcat
7 4 (1.41%) Elasticsearch
8 2 (0.71%) Drupal
9 1 (0.35%) Liferay
9 1 (0.35%) nginx
Applications
1 1 (0.35%) Photoshop
Business Applications
1 44 (15.55%) Eloqua
2 4 (1.41%) Distributed Ledger
Cloud Services
1 184 (65.02%) Amazon AWS
2 151 (53.36%) npm
3 144 (50.88%) Microsoft Azure
4 76 (26.86%) GitHub
5 48 (16.96%) Amazon S3
6 47 (16.61%) Amazon EC2
7 43 (15.19%) Cloud Computing
8 28 (9.89%) Yarn
9 17 (6.01%) IaaS
9 17 (6.01%) PaaS
9 17 (6.01%) Slack
10 8 (2.83%) AWS Lambda
10 8 (2.83%) Serverless
11 7 (2.47%) BrowserStack
12 5 (1.77%) AWS Elastic Beanstalk
13 4 (1.41%) CloudFront
14 2 (0.71%) Amazon SQS
14 2 (0.71%) IBM Cloud
14 2 (0.71%) SaaS
15 1 (0.35%) Twilio
Communications & Networking
1 9 (3.18%) HTTP
2 1 (0.35%) AMQP
2 1 (0.35%) Internet
2 1 (0.35%) Intranet
Database & Business Intelligence
1 150 (53.00%) NoSQL
2 103 (36.40%) MongoDB
3 54 (19.08%) Redis
4 51 (18.02%) PostgreSQL
5 50 (17.67%) MySQL
6 48 (16.96%) SQL Server
7 46 (16.25%) CouchDB
8 45 (15.90%) Blockchain
9 44 (15.55%) Couchbase
10 24 (8.48%) Relational Database
11 2 (0.71%) Big Data
12 1 (0.35%) Amazon RDS
12 1 (0.35%) Hazelcast
Development Applications
1 276 (97.53%) Mocha
2 210 (74.20%) Git (software)
3 155 (54.77%) Karma Test Runner
4 154 (54.42%) gulp
5 142 (50.18%) Selenium
6 119 (42.05%) Protractor
7 116 (40.99%) webpack
8 110 (38.87%) Sinon.JS
9 102 (36.04%) TeamCity
10 90 (31.80%) Bower
10 90 (31.80%) Octopus Deploy
10 90 (31.80%) Team Foundation Server
10 90 (31.80%) Visual Studio
11 63 (22.26%) Jasmine
12 58 (20.49%) Grunt
13 48 (16.96%) Jenkins
14 36 (12.72%) Babel
15 22 (7.77%) JUnit
16 19 (6.71%) JIRA
17 18 (6.36%) Maven
General
1 100 (35.34%) Finance
2 85 (30.04%) Banking
3 48 (16.96%) Advertising
4 44 (15.55%) Marketing
5 42 (14.84%) Telecoms
6 39 (13.78%) Games
7 20 (7.07%) Retail
8 9 (3.18%) Automotive
9 8 (2.83%) Law
10 5 (1.77%) Investment Banking
11 1 (0.35%) Publishing
Job Titles
1 238 (84.10%) Developer
2 69 (24.38%) .NET Developer
3 68 (24.03%) Senior Developer
4 43 (15.19%) Full Stack Developer
5 40 (14.13%) Blockchain Developer
6 39 (13.78%) ASP.NET Developer
7 38 (13.43%) C# Developer
7 38 (13.43%) Front End Developer (Client-Side Developer)
8 37 (13.07%) JavaScript Developer
9 30 (10.60%) Angular Developer
9 30 (10.60%) React Developer
10 29 (10.25%) Node.js Developer
11 24 (8.48%) Senior Front-End Developer
12 22 (7.77%) Lead Developer
13 20 (7.07%) Backend Developer
13 20 (7.07%) Senior Backend Developer
14 18 (6.36%) Digital Developer
15 14 (4.95%) C# .NET Developer
15 14 (4.95%) C# ASP.NET Developer
16 11 (3.89%) JavaScript Engineer
Libraries, Frameworks & Software Standards
1 216 (76.33%) CSS
2 189 (66.78%) HTML
3 183 (64.66%) AngularJS
4 160 (56.54%) HTML5
5 158 (55.83%) CSS3
6 146 (51.59%) Sass
7 133 (47.00%) LESS
8 131 (46.29%) Node.js
9 121 (42.76%) Jest
10 114 (40.28%) RESTful
11 103 (36.40%) Gherkin
11 103 (36.40%) React
12 101 (35.69%) Backbone.js
13 100 (35.34%) Twitter Bootstrap
14 99 (34.98%) jQuery
15 98 (34.63%) .NET
16 94 (33.22%) MEAN Stack
17 92 (32.51%) Ember.js
18 75 (26.50%) Enzyme
19 65 (22.97%) ASP.NET
Miscellaneous
1 90 (31.80%) User Experience
2 44 (15.55%) Cloud Native
3 43 (15.19%) Bitcoin
4 19 (6.71%) Self-Motivation
5 17 (6.01%) Mobile App
6 12 (4.24%) Computer Science
6 12 (4.24%) Fintech
7 10 (3.53%) Linux Command Line
8 9 (3.18%) Algorithms
8 9 (3.18%) Data Structures
8 9 (3.18%) Online Gambling
9 5 (1.77%) Blog
9 5 (1.77%) Online Banking
10 4 (1.41%) Analytical Skills
10 4 (1.41%) Augmented Reality
11 3 (1.06%) Greenfield Project
12 2 (0.71%) Clustering
12 2 (0.71%) Enterprise Software
12 2 (0.71%) Robotics
13 1 (0.35%) Online Games
Operating Systems
1 59 (20.85%) Linux
2 43 (15.19%) VMS
3 2 (0.71%) Android
3 2 (0.71%) Apple iOS
4 1 (0.35%) Unix
Processes & Methodologies
1 185 (65.37%) TDD
2 182 (64.31%) Agile Software Development
3 149 (52.65%) BDD
4 134 (47.35%) DevOps
5 126 (44.52%) Problem-Solving
6 110 (38.87%) Software Engineering
7 106 (37.46%) Microservices
8 100 (35.34%) Responsive Web Design
9 97 (34.28%) Test Automation
10 94 (33.22%) Continuous Improvement
11 93 (32.86%) Web Application Development
12 91 (32.16%) Analytics
12 91 (32.16%) Progressive Web App
12 91 (32.16%) Refactoring
13 90 (31.80%) Performance Management
14 89 (31.45%) Data Science
15 88 (31.10%) Front End Development
16 68 (24.03%) MVC
17 54 (19.08%) Workflow
18 46 (16.25%) Application Performance Management
Programming Languages
1 217 (76.68%) JavaScript
2 144 (50.88%) SQL
3 106 (37.46%) ES6
4 57 (20.14%) Java
5 48 (16.96%) C#
6 43 (15.19%) Solidity
7 27 (9.54%) Python
8 24 (8.48%) Ruby
9 23 (8.13%) Haskell
10 20 (7.07%) Lua
11 19 (6.71%) Apple Swift
11 19 (6.71%) C++
11 19 (6.71%) Elixir
11 19 (6.71%) Go
11 19 (6.71%) Java 8
11 19 (6.71%) Objective-C
11 19 (6.71%) Rust
11 19 (6.71%) Scala
12 16 (5.65%) TypeScript
13 9 (3.18%) ES7
Qualifications
1 110 (38.87%) Degree
2 48 (16.96%) SAFe Agilist
3 1 (0.35%) Computer Science Degree
3 1 (0.35%) SC Cleared
3 1 (0.35%) Security Cleared
Quality Assurance & Compliance
1 16 (5.65%) QA
System Software
1 71 (25.09%) Docker
2 42 (14.84%) Virtual Machines
Systems Management
1 48 (16.96%) Kubernetes
2 43 (15.19%) Docker Swarm
3 2 (0.71%) Ansible
Vendors
1 44 (15.55%) Marketo
1 44 (15.55%) Sitecore
2 37 (13.07%) Alias
3 17 (6.01%) Cypress Semiconductor
4 16 (5.65%) AppDynamics
4 16 (5.65%) Splunk
5 2 (0.71%) Google
5 2 (0.71%) IBM
6 1 (0.35%) Facebook
6 1 (0.35%) hybris
6 1 (0.35%) Microsoft
6 1 (0.35%) Oracle
6 1 (0.35%) Zend