Job Vacancy Trend Salary Trend Salary Histogram Job Locations Skill Sets
Period
to 18 September 2019

The following table provides summary statistics for permanent job vacancies with a requirement for RxJS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited RxJS over the 6 months to 18 September 2019 with a comparison to the same period in the previous 2 years.

Reactive Extensions for JavaScript (RxJS)
UK
6 months to
18 Sep 2019		 Same period 2018 Same period 2017
Rank 905 1116 1175
Rank change year-on-year +211 +59 +95
Permanent jobs citing RxJS 184 70 46
As % of all permanent IT jobs advertised in the UK 0.13% 0.042% 0.026%
As % of the Libraries, Frameworks & Software Standards category 0.35% 0.10% 0.065%
Number of salaries quoted 182 69 37
UK median annual salary £72,000 £57,500 £67,500
Median salary % change year-on-year +25.22% -14.81% +42.11%
10th Percentile £45,000 £36,250 £22,500
90th Percentile £99,500 £90,500 £128,000
UK excluding London median annual salary £52,500 £50,000 £25,000
% change year-on-year +5.00% +100.00% -47.37%

RxJS 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 52,929 67,154 71,103
As % of all permanent IT jobs advertised in the UK 37.38% 40.03% 40.31%
Number of salaries quoted 43,379 55,683 58,825
UK median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -
10th Percentile £32,250 £31,250 £29,000
90th Percentile £87,500 £82,500 £77,500
UK excluding London median annual salary £45,000 £45,000 £42,500
% change year-on-year - +5.88% +2.41%

RxJS
Job Vacancy Trend

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

Job vacancy trend for RxJS in the UK

RxJS
Salary Trend

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

Salary trend for RxJS in the UK

RxJS
Salary Histogram

The salary distribution of IT jobs citing RxJS over the 6 months to 18 September 2019.

Salary histogram for RxJS in the UK

RxJS
Top 10 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing RxJS within the UK over the 6 months to 18 September 2019. 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 +223 180 £72,000 +22.55% 30
London +192 151 £75,000 +13.21% 24
UK excluding London +68 31 £52,500 +5.00% 6
East of England - 18 £52,500 - 1
South West +25 7 £40,000 +14.29% 1
North of England +27 2 £47,500 +5.56% 2
South East +20 2 £32,500 -33.33% 1
North West +14 2 £47,500 +5.56% 1
Wales +8 1 £50,000 -
Scotland +7 1 - -

For the 6 months to 18 September 2019, IT jobs citing RxJS 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 RxJS.

1 162 (88.04%) JavaScript
2 128 (69.57%) CSS
3 119 (64.67%) Front End Development
4 109 (59.24%) AngularJS
4 109 (59.24%) HTML
5 104 (56.52%) User Experience
5 104 (56.52%) ES6
6 98 (53.26%) React
6 98 (53.26%) TypeScript
7 88 (47.83%) Redux
8 87 (47.28%) Agile Software Development
9 86 (46.74%) HTML5
10 70 (38.04%) TDD
11 66 (35.87%) Sass
12 60 (32.61%) CSS3
13 57 (30.98%) Finance
14 48 (26.09%) Vue.js
15 45 (24.46%) Fintech
16 41 (22.28%) AWS
17 37 (20.11%) Jasmine
18 36 (19.57%) Analytics
19 35 (19.02%) Computer Science
20 34 (18.48%) Node.js
20 34 (18.48%) React Native
21 32 (17.39%) Continuous Improvement
21 32 (17.39%) Degree
21 32 (17.39%) Git (software)
22 31 (16.85%) Scrum
22 31 (16.85%) HTTP
22 31 (16.85%) REST

RxJS
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 4 (2.17%) WordPress
2 3 (1.63%) Apache
2 3 (1.63%) CMS
2 3 (1.63%) Confluence
2 3 (1.63%) nginx
2 3 (1.63%) Tornado
3 1 (0.54%) Elasticsearch
3 1 (0.54%) Oracle SOA Suite
Applications
1 1 (0.54%) Photoshop
Cloud Services
1 41 (22.28%) AWS
2 16 (8.70%) GCP
3 12 (6.52%) Google Analytics
4 10 (5.43%) Azure
4 10 (5.43%) SaaS
4 10 (5.43%) Serverless
5 8 (4.35%) Yarn
6 6 (3.26%) Apigee
6 6 (3.26%) Cloudflare
6 6 (3.26%) CloudFront
6 6 (3.26%) npm
7 3 (1.63%) GitHub
8 2 (1.09%) Cloud Computing
Communications & Networking
1 31 (16.85%) HTTP
2 6 (3.26%) Internet
3 3 (1.63%) Reverse Proxy
Database & Business Intelligence
1 9 (4.89%) MySQL
2 6 (3.26%) NoSQL
2 6 (3.26%) PostgreSQL
3 5 (2.72%) Neo4j
4 4 (2.17%) MongoDB
4 4 (2.17%) Relational Database
5 3 (1.63%) Amazon Redshift
5 3 (1.63%) Big Data
6 2 (1.09%) Blockchain
6 2 (1.09%) RethinkDB
7 1 (0.54%) BigQuery
7 1 (0.54%) Redis
7 1 (0.54%) SQL Server
Development Applications
1 37 (20.11%) Jasmine
2 32 (17.39%) Git (software)
3 22 (11.96%) webpack
4 12 (6.52%) Subversion
5 11 (5.98%) Protractor
6 8 (4.35%) Karma Test Runner
7 7 (3.80%) Mocha
7 7 (3.80%) Selenium
8 4 (2.17%) JIRA
8 4 (2.17%) PostCSS
9 3 (1.63%) Babel
9 3 (1.63%) Grunt
10 2 (1.09%) gulp
10 2 (1.09%) Sinon.JS
11 1 (0.54%) Bitbucket
11 1 (0.54%) Jenkins
11 1 (0.54%) TeamCity
General
1 57 (30.98%) Finance
2 20 (10.87%) Banking
3 9 (4.89%) Retail
4 7 (3.80%) Front Office
4 7 (3.80%) Games
5 5 (2.72%) Investment Banking
6 3 (1.63%) Advertising
7 2 (1.09%) Manufacturing
7 2 (1.09%) Publishing
8 1 (0.54%) Law
8 1 (0.54%) Multimedia
Job Titles
1 149 (80.98%) Developer
2 73 (39.67%) Front End Developer (Client-Side Developer)
3 51 (27.72%) Senior Developer
4 47 (25.54%) React Developer
5 34 (18.48%) Angular Developer
5 34 (18.48%) JavaScript Developer
6 25 (13.59%) Senior Front-End Developer
7 24 (13.04%) Senior React Developer
8 16 (8.70%) HTML Developer
9 13 (7.07%) Lead Developer
10 12 (6.52%) Full Stack Developer
11 9 (4.89%) HTML CSS Developer
12 8 (4.35%) Principal Developer
12 8 (4.35%) UI Developer
13 7 (3.80%) Web Developer
14 6 (3.26%) Machine Learning Developer
15 5 (2.72%) UX Developer
16 4 (2.17%) JavaScript Engineer
16 4 (2.17%) Node.js Developer
16 4 (2.17%) Senior JavaScript Developer
Libraries, Frameworks & Software Standards
1 128 (69.57%) CSS
2 109 (59.24%) AngularJS
2 109 (59.24%) HTML
3 98 (53.26%) React
4 88 (47.83%) Redux
5 86 (46.74%) HTML5
6 66 (35.87%) Sass
7 60 (32.61%) CSS3
8 48 (26.09%) Vue.js
9 34 (18.48%) Node.js
9 34 (18.48%) React Native
10 31 (16.85%) REST
11 29 (15.76%) NgRx
12 25 (13.59%) Angular 2
13 17 (9.24%) RESTful
14 14 (7.61%) LESS
14 14 (7.61%) WebSockets
15 13 (7.07%) Ajax
16 12 (6.52%) D3.js
17 11 (5.98%) OpenFin
Miscellaneous
1 104 (56.52%) User Experience
2 25 (13.59%) Greenfield Project
3 24 (13.04%) Algorithms
3 24 (13.04%) Data Structures
4 22 (11.96%) Mobile App
5 19 (10.33%) Enterprise Software
6 7 (3.80%) Cloud Native
7 6 (3.26%) Analytical Skills
7 6 (3.26%) Augmented Reality
7 6 (3.26%) Virtual Team
8 5 (2.72%) Fixed Income
8 5 (2.72%) Foreign Exchange (FX)
8 5 (2.72%) Graphic Design
9 3 (1.63%) Management Information System
10 2 (1.09%) e-Learning
10 2 (1.09%) Grid Computing
10 2 (1.09%) Hedge funds
10 2 (1.09%) Self-Motivation
11 1 (0.54%) Animation
11 1 (0.54%) Renewable Energy
Operating Systems
1 8 (4.35%) Linux
2 4 (2.17%) Android
2 4 (2.17%) Apple iOS
3 2 (1.09%) Unix
Processes & Methodologies
1 119 (64.67%) Front End Development
2 87 (47.28%) Agile Software Development
3 70 (38.04%) TDD
4 45 (24.46%) Fintech
5 36 (19.57%) Analytics
6 35 (19.02%) Computer Science
7 32 (17.39%) Continuous Improvement
8 31 (16.85%) Scrum
9 27 (14.67%) Web Development
10 25 (13.59%) DevOps
11 20 (10.87%) OO
12 16 (8.70%) Cross-Browser Compatibility
12 16 (8.70%) DesignOps
12 16 (8.70%) Prototyping
13 15 (8.15%) Artificial Intelligence
13 15 (8.15%) Microservices
14 13 (7.07%) Unit Testing
15 12 (6.52%) Mobile Development
15 12 (6.52%) Test Automation
16 11 (5.98%) Software Engineering
Programming Languages
1 162 (88.04%) JavaScript
2 104 (56.52%) ES6
3 98 (53.26%) TypeScript
4 21 (11.41%) ES7
5 19 (10.33%) Python
6 18 (9.78%) Java
7 9 (4.89%) JSX
8 8 (4.35%) C#
8 8 (4.35%) PHP
9 6 (3.26%) Go
10 5 (2.72%) R
11 4 (2.17%) C
12 3 (1.63%) Ruby
13 2 (1.09%) C++
13 2 (1.09%) SQL
14 1 (0.54%) Bash Shell
14 1 (0.54%) PowerShell
14 1 (0.54%) Rust
14 1 (0.54%) Shell Script
Qualifications
1 32 (17.39%) Degree
2 6 (3.26%) Computer Science Degree
3 3 (1.63%) DBS Check
3 3 (1.63%) PhD
4 1 (0.54%) Master's Degree
Quality Assurance & Compliance
1 14 (7.61%) QA
System Software
1 30 (16.30%) Docker
Systems Management
1 10 (5.43%) Matomo
2 4 (2.17%) Puppet
3 2 (1.09%) Opscode Chef
4 1 (0.54%) Kubernetes
Vendors
1 20 (10.87%) Google
2 10 (5.43%) Hotjar
3 2 (1.09%) Facebook
4 1 (0.54%) Apple
4 1 (0.54%) IONA
4 1 (0.54%) Oracle