Job Vacancy Trend Salary Trend Salary Histogram Job Locations Skill Sets
Period
to 17 June 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 17 June 2019 with a comparison to the same period in the previous 2 years.

Reactive Extensions for JavaScript (RxJS)
UK
6 months to
17 Jun 2019		 Same period 2018 Same period 2017
Rank 910 1079 1131
Rank change year-on-year +169 +52 +183
Permanent jobs citing RxJS 188 125 41
As % of all permanent IT jobs advertised in the UK 0.13% 0.073% 0.024%
As % of the Libraries, Frameworks & Software Standards category 0.34% 0.18% 0.059%
Number of salaries quoted 184 112 36
UK median annual salary £72,000 £57,500 £40,000
Median salary % change year-on-year +25.22% +43.75% -21.95%
10th Percentile £41,250 £32,500 £36,250
90th Percentile £105,000 £90,000 £71,875
UK excluding London median annual salary £52,500 £39,500 £41,250
% change year-on-year +32.91% -4.24% -

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 54,783 69,661 69,893
As % of all permanent IT jobs advertised in the UK 38.22% 40.54% 40.63%
Number of salaries quoted 45,001 58,311 59,173
UK median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -
10th Percentile £31,250 £31,250 £28,750
90th Percentile £85,000 £80,000 £76,250
UK excluding London median annual salary £45,000 £45,000 £42,000
% change year-on-year - +7.14% +2.44%

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 17 June 2019.

Salary histogram for RxJS in the UK

RxJS
Top 9 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 17 June 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 +152 184 £72,000 +25.22% 14
London +132 138 £76,250 +22.00% 8
UK excluding London +68 50 £52,500 +32.91% 6
East of England - 17 £45,000 -
South East +37 16 £57,500 +27.78% 1
South West +12 8 £40,000 +14.29% 1
North West +29 5 £52,500 +16.67%
North of England +26 5 £52,500 +16.67% 2
Wales +20 4 £42,500 +6.25%

For the 6 months to 17 June 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.

1 156 (82.98%) JavaScript
2 119 (63.30%) Front End Development
3 117 (62.23%) Agile Software Development
4 110 (58.51%) AngularJS
5 108 (57.45%) CSS
6 107 (56.91%) ES6
7 104 (55.32%) React
8 100 (53.19%) User Experience
9 93 (49.47%) HTML
10 92 (48.94%) TypeScript
11 84 (44.68%) Redux
12 65 (34.57%) Finance
13 61 (32.45%) HTML5
14 55 (29.26%) CSS3
15 54 (28.72%) Git (software)
16 50 (26.60%) Scrum
17 41 (21.81%) Banking
17 41 (21.81%) Vue.js
18 40 (21.28%) Sass
18 40 (21.28%) OO
19 37 (19.68%) TDD
20 34 (18.09%) Amazon AWS
20 34 (18.09%) Java
21 33 (17.55%) Web Development
22 32 (17.02%) Fintech
23 31 (16.49%) Computer Science
24 30 (15.96%) OpenFin
25 29 (15.43%) Continuous Improvement
26 28 (14.89%) Software Engineering
26 28 (14.89%) ES7

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 5 (2.66%) WordPress
2 4 (2.13%) Apache
3 2 (1.06%) Confluence
3 2 (1.06%) Elasticsearch
3 2 (1.06%) nginx
3 2 (1.06%) Tornado
Applications
1 1 (0.53%) Photoshop
Cloud Services
1 34 (18.09%) Amazon AWS
2 25 (13.30%) Google Cloud Platform
3 13 (6.91%) SaaS
4 9 (4.79%) Yarn
5 8 (4.26%) Microsoft Azure
6 2 (1.06%) Amazon ECS
6 2 (1.06%) Amazon S3
6 2 (1.06%) GitHub
7 1 (0.53%) Cloud Computing
7 1 (0.53%) Serverless
Communications & Networking
1 21 (11.17%) HTTP
2 11 (5.85%) Internet
3 2 (1.06%) Reverse Proxy
3 2 (1.06%) SAN
Database & Business Intelligence
1 7 (3.72%) MongoDB
1 7 (3.72%) MySQL
2 6 (3.19%) PostgreSQL
3 5 (2.66%) NoSQL
4 3 (1.60%) Relational Database
5 2 (1.06%) Amazon RDS
5 2 (1.06%) Amazon Redshift
5 2 (1.06%) Neo4j
5 2 (1.06%) Redis
5 2 (1.06%) Text Mining
6 1 (0.53%) SQL Server
Development Applications
1 54 (28.72%) Git (software)
2 27 (14.36%) Jasmine
3 19 (10.11%) webpack
4 15 (7.98%) Subversion
5 11 (5.85%) Protractor
6 8 (4.26%) Karma Test Runner
7 6 (3.19%) Mocha
7 6 (3.19%) PostCSS
8 5 (2.66%) Selenium
9 4 (2.13%) Babel
10 3 (1.60%) Grunt
10 3 (1.60%) gulp
11 2 (1.06%) JIRA
11 2 (1.06%) jMock
11 2 (1.06%) JUnit
11 2 (1.06%) Maven
11 2 (1.06%) Mockito
12 1 (0.53%) Atlassian Bamboo
12 1 (0.53%) Cucumber
General
1 65 (34.57%) Finance
2 41 (21.81%) Banking
3 13 (6.91%) Front Office
4 10 (5.32%) Publishing
5 9 (4.79%) Games
6 6 (3.19%) Retail
7 5 (2.66%) Advertising
7 5 (2.66%) Investment Banking
8 4 (2.13%) Manufacturing
9 1 (0.53%) Pharmaceutical
Job Titles
1 165 (87.77%) Developer
2 103 (54.79%) Front End Developer (Client-Side Developer)
3 56 (29.79%) React Developer
4 53 (28.19%) JavaScript Developer
5 48 (25.53%) Senior Developer
6 36 (19.15%) Senior React Developer
7 31 (16.49%) Senior Front-End Developer
8 21 (11.17%) HTML Developer
9 15 (7.98%) Angular Developer
9 15 (7.98%) UI Developer
10 14 (7.45%) Full Stack Developer
11 12 (6.38%) HTML CSS Developer
11 12 (6.38%) Lead Developer
12 7 (3.72%) Java Developer
12 7 (3.72%) Software Engineer
12 7 (3.72%) Technical Leader
12 7 (3.72%) UX Developer
13 6 (3.19%) UI/UX Developer
14 5 (2.66%) Algorithmic Trading Developer
15 4 (2.13%) Senior JavaScript Developer
Libraries, Frameworks & Software Standards
1 110 (58.51%) AngularJS
2 108 (57.45%) CSS
3 104 (55.32%) React
4 93 (49.47%) HTML
5 84 (44.68%) Redux
6 61 (32.45%) HTML5
7 55 (29.26%) CSS3
8 41 (21.81%) Vue.js
9 40 (21.28%) Sass
10 30 (15.96%) OpenFin
11 25 (13.30%) WebSockets
12 24 (12.77%) Angular 2
12 24 (12.77%) Node.js
13 22 (11.70%) React Native
14 21 (11.17%) NgRx
15 20 (10.64%) Ajax
15 20 (10.64%) REST
16 19 (10.11%) D3.js
17 18 (9.57%) Jest
18 15 (7.98%) LESS
Miscellaneous
1 100 (53.19%) User Experience
2 24 (12.77%) Greenfield Project
3 21 (11.17%) Algorithms
3 21 (11.17%) Data Structures
4 11 (5.85%) Mobile App
5 10 (5.32%) Virtual Team
6 9 (4.79%) Foreign Exchange (FX)
7 8 (4.26%) Analytical Skills
8 7 (3.72%) Cloud Native
8 7 (3.72%) Fixed Income
8 7 (3.72%) Self-Motivation
9 2 (1.06%) Augmented Reality
9 2 (1.06%) e-Learning
9 2 (1.06%) Hedge funds
9 2 (1.06%) Management Information System
9 2 (1.06%) Video Editing
10 1 (0.53%) Animation
10 1 (0.53%) Data Protection Act
10 1 (0.53%) Enterprise Software
10 1 (0.53%) Grid Computing
Operating Systems
1 16 (8.51%) Linux
2 7 (3.72%) Unix
3 5 (2.66%) Android
3 5 (2.66%) Apple iOS
4 2 (1.06%) Windows
Processes & Methodologies
1 119 (63.30%) Front End Development
2 117 (62.23%) Agile Software Development
3 50 (26.60%) Scrum
4 40 (21.28%) OO
5 37 (19.68%) TDD
6 33 (17.55%) Web Development
7 32 (17.02%) Fintech
8 31 (16.49%) Computer Science
9 29 (15.43%) Continuous Improvement
10 28 (14.89%) Software Engineering
11 23 (12.23%) Analytics
12 20 (10.64%) Artificial Intelligence
13 19 (10.11%) Open Source
14 17 (9.04%) Unit Testing
15 15 (7.98%) Microservices
16 14 (7.45%) Cross-Browser Compatibility
17 13 (6.91%) SDLC
18 12 (6.38%) DevOps
19 10 (5.32%) Functional Programming
19 10 (5.32%) Wireframes
Programming Languages
1 156 (82.98%) JavaScript
2 107 (56.91%) ES6
3 92 (48.94%) TypeScript
4 34 (18.09%) Java
5 28 (14.89%) ES7
6 27 (14.36%) Python
7 24 (12.77%) JSX
8 17 (9.04%) C#
9 14 (7.45%) PHP
10 13 (6.91%) C++
11 11 (5.85%) Ruby
12 8 (4.26%) Apple Swift
12 8 (4.26%) Kotlin
12 8 (4.26%) Objective-C
12 8 (4.26%) Perl
12 8 (4.26%) SQL
13 6 (3.19%) C
14 5 (2.66%) R
15 2 (1.06%) Go
15 2 (1.06%) Java 8
Qualifications
1 25 (13.30%) Degree
2 6 (3.19%) Computer Science Degree
3 4 (2.13%) Master's Degree
4 2 (1.06%) DBS Check
4 2 (1.06%) PhD
Quality Assurance & Compliance
1 17 (9.04%) QA
System Software
1 12 (6.38%) Docker
Systems Management
1 5 (2.66%) Puppet
2 2 (1.06%) Kubernetes
2 2 (1.06%) Opscode Chef
2 2 (1.06%) Terraform
Vendors
1 17 (9.04%) Google
2 2 (1.06%) Greenplum
3 1 (0.53%) Atlassian
3 1 (0.53%) Microsoft