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

Chai Assertion Library (Chai.js)
UK
6 months to
17 Jul 2018
Same period 2017 Same period 2016
Rank 863 991 1213
Rank change year-on-year +128 +222 +60
Permanent jobs citing Chai 323 193 82
As % of all permanent IT jobs advertised in the UK 0.18% 0.11% 0.040%
As % of the Libraries, Frameworks & Software Standards category 0.45% 0.27% 0.10%
Number of salaries quoted 188 164 65
UK median annual salary £70,000 £60,000 £62,500
Median salary % change year-on-year +16.67% -4.00% +13.64%
10th Percentile £41,250 £36,625 £41,000
90th Percentile £87,500 £100,000 £101,000
UK excluding London median annual salary £49,250 £45,000 £37,500
% change year-on-year +9.44% +20.00% -36.17%

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 71,411 72,214 79,272
As % of all permanent IT jobs advertised in the UK 40.61% 40.66% 38.99%
Number of salaries quoted 59,472 60,657 68,576
UK median annual salary £50,000 £47,500 £47,500
Median salary % change year-on-year +5.26% - +5.56%
10th Percentile £31,250 £28,750 £28,750
90th Percentile £80,000 £77,500 £75,000
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 July 2018.

Salary histogram for Chai in the UK

Chai
Top 13 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 July 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 +140 320 £70,000 +16.67% 42
London +148 270 £75,000 +11.11% 33
UK excluding London -6 52 £49,250 +9.44% 9
South East -16 22 £53,500 +18.89% 3
North of England +18 14 £46,250 -2.12% 2
North West +21 12 £45,000 -14.69% 2
South West +11 9 £47,500 +26.67% 2
East of England +9 3 £60,000 +20.00%
West Midlands +20 2 £41,250 -8.33% 2
Midlands +19 2 £41,250 -8.33% 2
Scotland - 2 - -
Yorkshire +19 1 £47,500 +10.47%
North East - 1 - -

For the 6 months to 17 July 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.

1 318 (98.45%) Mocha
2 250 (77.40%) CSS
3 240 (74.30%) Git (software)
4 224 (69.35%) HTML
5 215 (66.56%) Amazon AWS
6 204 (63.16%) JavaScript
6 204 (63.16%) Agile Software Development
7 192 (59.44%) Node.js
8 187 (57.89%) Jest
9 179 (55.42%) TDD
10 178 (55.11%) CSS3
10 178 (55.11%) HTML5
11 160 (49.54%) AngularJS
12 159 (49.23%) ES6
13 149 (46.13%) DevOps
14 148 (45.82%) BDD
15 147 (45.51%) SQL
16 146 (45.20%) Selenium
17 144 (44.58%) NoSQL
18 141 (43.65%) Test Automation
19 140 (43.34%) Microsoft Azure
20 127 (39.32%) gulp
21 124 (38.39%) User Experience
22 123 (38.08%) React
22 123 (38.08%) Karma Test Runner
23 122 (37.77%) GitHub
24 121 (37.46%) Finance
25 120 (37.15%) Sass
26 116 (35.91%) Banking
27 114 (35.29%) npm

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 83 (25.70%) CMS
2 70 (21.67%) EPiServer
3 59 (18.27%) Ethereum
4 45 (13.93%) Confluence
5 42 (13.00%) Cloud Foundry
5 42 (13.00%) Mule
5 42 (13.00%) Tomcat
6 41 (12.69%) Sitecore CMS
7 6 (1.86%) Drupal
7 6 (1.86%) WordPress
8 2 (0.62%) Elasticsearch
8 2 (0.62%) IIS
8 2 (0.62%) Mongoose
8 2 (0.62%) nginx
Applications
1 1 (0.31%) Photoshop
Business Applications
1 41 (12.69%) Eloqua
2 25 (7.74%) Distributed Ledger
Cloud Services
1 215 (66.56%) Amazon AWS
2 140 (43.34%) Microsoft Azure
3 122 (37.77%) GitHub
4 114 (35.29%) npm
5 64 (19.81%) Amazon EC2
5 64 (19.81%) Amazon S3
6 58 (17.96%) Cloud Computing
7 47 (14.55%) Slack
8 42 (13.00%) IaaS
8 42 (13.00%) PaaS
9 21 (6.50%) Yarn
10 7 (2.17%) BrowserStack
11 5 (1.55%) Amazon SQS
11 5 (1.55%) Twilio
12 4 (1.24%) AWS Lambda
12 4 (1.24%) Serverless
13 2 (0.62%) CloudFront
13 2 (0.62%) Google Cloud Platform
13 2 (0.62%) NuGet
13 2 (0.62%) Sauce Labs
Communications & Networking
1 21 (6.50%) HTTP
2 2 (0.62%) DNS
2 2 (0.62%) Internet
2 2 (0.62%) SSL
2 2 (0.62%) TCP/IP
3 1 (0.31%) SMS
Database & Business Intelligence
1 144 (44.58%) NoSQL
2 78 (24.15%) MongoDB
3 76 (23.53%) PostgreSQL
4 75 (23.22%) MySQL
5 71 (21.98%) Blockchain
6 70 (21.67%) Redis
7 45 (13.93%) SQL Server
8 42 (13.00%) Couchbase
9 25 (7.74%) CouchDB
10 13 (4.02%) Relational Database
Development Applications
1 318 (98.45%) Mocha
2 240 (74.30%) Git (software)
3 146 (45.20%) Selenium
4 127 (39.32%) gulp
5 123 (38.08%) Karma Test Runner
6 107 (33.13%) Protractor
7 100 (30.96%) webpack
8 88 (27.24%) Sinon.JS
9 77 (23.84%) Jasmine
10 75 (23.22%) Jenkins
11 74 (22.91%) TeamCity
12 68 (21.05%) Babel
13 67 (20.74%) Bower
13 67 (20.74%) Octopus Deploy
13 67 (20.74%) Team Foundation Server
13 67 (20.74%) Visual Studio
14 51 (15.79%) JUnit
15 49 (15.17%) Grunt
15 49 (15.17%) JIRA
16 45 (13.93%) Maven
General
1 121 (37.46%) Finance
2 116 (35.91%) Banking
3 62 (19.20%) Telecoms
4 43 (13.31%) Advertising
5 41 (12.69%) Marketing
6 36 (11.15%) Games
7 18 (5.57%) Retail
8 8 (2.48%) Law
9 5 (1.55%) Investment Banking
10 4 (1.24%) Automotive
11 3 (0.93%) Publishing
12 2 (0.62%) French Language
Job Titles
1 254 (78.64%) Developer
2 62 (19.20%) Senior Developer
3 56 (17.34%) .NET Developer
3 56 (17.34%) JavaScript Developer
4 53 (16.41%) Node.js Developer
5 43 (13.31%) Blockchain Developer
6 41 (12.69%) Backend Developer
7 40 (12.38%) Front End Developer (Client-Side Developer)
8 29 (8.98%) Full Stack Developer
9 26 (8.05%) Angular Developer
10 23 (7.12%) Lead Developer
11 20 (6.19%) C# Developer
11 20 (6.19%) Technical Leader
12 19 (5.88%) ASP.NET Developer
13 16 (4.95%) Java Developer
13 16 (4.95%) Senior Front-End Developer
14 15 (4.64%) Senior Java Developer
15 14 (4.33%) Digital Developer
15 14 (4.33%) EPiServer Developer
15 14 (4.33%) Senior Backend Developer
Libraries, Frameworks & Software Standards
1 250 (77.40%) CSS
2 224 (69.35%) HTML
3 192 (59.44%) Node.js
4 187 (57.89%) Jest
5 178 (55.11%) CSS3
5 178 (55.11%) HTML5
6 160 (49.54%) AngularJS
7 123 (38.08%) React
8 120 (37.15%) Sass
9 111 (34.37%) Enzyme
10 101 (31.27%) LESS
11 89 (27.55%) Gherkin
11 89 (27.55%) Redux
12 88 (27.24%) RESTful
13 82 (25.39%) REST
14 80 (24.77%) jQuery
15 79 (24.46%) Backbone.js
16 78 (24.15%) Ember.js
17 73 (22.60%) .NET
17 73 (22.60%) Twitter Bootstrap
Miscellaneous
1 124 (38.39%) User Experience
2 59 (18.27%) Bitcoin
3 44 (13.62%) Mobile App
4 42 (13.00%) Cloud Native
5 20 (6.19%) Computer Science
5 20 (6.19%) Fintech
6 16 (4.95%) Linux Command Line
7 13 (4.02%) Algorithms
7 13 (4.02%) Data Structures
7 13 (4.02%) Online Gambling
8 12 (3.72%) Self-Motivation
9 7 (2.17%) Greenfield Project
10 6 (1.86%) Blog
11 5 (1.55%) Clustering
11 5 (1.55%) Online Banking
12 3 (0.93%) Analytical Skills
12 3 (0.93%) Animation
13 2 (0.62%) Augmented Reality
13 2 (0.62%) Derivative
13 2 (0.62%) Virtual Team
Operating Systems
1 89 (27.55%) Linux
2 57 (17.65%) VMS
3 4 (1.24%) Android
3 4 (1.24%) Apple iOS
Processes & Methodologies
1 204 (63.16%) Agile Software Development
2 179 (55.42%) TDD
3 149 (46.13%) DevOps
4 148 (45.82%) BDD
5 141 (43.65%) Test Automation
6 108 (33.44%) Front End Development
7 105 (32.51%) Problem-Solving
8 94 (29.10%) Software Engineering
9 83 (25.70%) Responsive Web Design
10 82 (25.39%) Scrum
11 81 (25.08%) Microservices
12 75 (23.22%) MVC
13 73 (22.60%) Continuous Improvement
14 71 (21.98%) Analytics
14 71 (21.98%) Kanban
14 71 (21.98%) Web Application Development
15 70 (21.67%) Progressive Web App
15 70 (21.67%) Refactoring
16 67 (20.74%) Data Science
16 67 (20.74%) Performance Management
Programming Languages
1 204 (63.16%) JavaScript
2 159 (49.23%) ES6
3 147 (45.51%) SQL
4 87 (26.93%) Java
5 56 (17.34%) Solidity
6 45 (13.93%) Java 8
7 25 (7.74%) C#
8 23 (7.12%) Ruby
9 20 (6.19%) Haskell
10 19 (5.88%) Python
11 17 (5.26%) TypeScript
12 15 (4.64%) ES7
13 13 (4.02%) Lua
14 12 (3.72%) Apple Swift
14 12 (3.72%) C++
14 12 (3.72%) Elixir
14 12 (3.72%) Go
14 12 (3.72%) Objective-C
14 12 (3.72%) Rust
14 12 (3.72%) Scala
Qualifications
1 91 (28.17%) Degree
2 45 (13.93%) SAFe Agilist
3 5 (1.55%) Computer Science Degree
4 2 (0.62%) A+ Certification
4 2 (0.62%) SC Cleared
4 2 (0.62%) Security Cleared
Quality Assurance & Compliance
1 14 (4.33%) QA
System Software
1 96 (29.72%) Docker
2 57 (17.65%) Virtual Machines
Systems Management
1 63 (19.50%) Kubernetes
2 61 (18.89%) Docker Swarm
3 1 (0.31%) Ansible
3 1 (0.31%) Opscode Chef
3 1 (0.31%) Packer
3 1 (0.31%) Puppet
3 1 (0.31%) Terraform
Vendors
1 44 (13.62%) AppDynamics
1 44 (13.62%) Splunk
2 41 (12.69%) Marketo
2 41 (12.69%) Sitecore
3 26 (8.05%) Alias
4 12 (3.72%) Cypress Semiconductor
5 2 (0.62%) Google
5 2 (0.62%) hybris
5 2 (0.62%) Rollbar
6 1 (0.31%) Microsoft
6 1 (0.31%) New Relic
6 1 (0.31%) Zend