Period
to 9 December 2019

The median contractor rate for a Senior JavaScript Developer was £550 per day in advertised job vacancies in the City of London during the 6 months to 9 December 2019.

The first table below provides contractor rate benchmarking and summary statistics including a comparison to same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Senior JavaScript Developer
Central London > City of London
6 months to
9 Dec 2019
Same period 2018 Same period 2017
Rank 208 239 229
Rank change year-on-year +31 -10 -13
Contract jobs requiring a Senior JavaScript Developer 10 22 27
As % of all contract IT jobs advertised in the City of London 0.18% 0.31% 0.38%
As % of the Job Titles category 0.19% 0.33% 0.40%
Number of daily rates quoted 10 22 25
City of London median daily rate £550 £625 £513
Median daily rate % change year-on-year -12.00% +21.95% +22.75%
10th Percentile £299 £473 £413
90th Percentile £584 £700 £588
Central London median daily rate £550 £600 £513
% change year-on-year -8.33% +17.07% +13.89%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

The following table is for comparison with the above and includes summary statistics for all contract IT job vacancies advertised in the City of London. Most job vacancies include a discernible job title that can be normalized. As such, the figures in the second row provide an indication of the number of contract jobs in our overall sample.

All Contract IT Job Vacancies
City of London
Contract vacancies in the City of London with a recognized job title 5,291 6,759 6,770
% of contract IT jobs with a recognized job title 93.22% 95.32% 94.75%
Number of daily rates quoted 4,123 5,344 5,371
City of London median daily rate £512 £500 £500
Median daily rate % change year-on-year +2.40% - +5.26%
10th Percentile £313 £300 £313
90th Percentile £675 £675 £688
Central London median daily rate £500 £500 £500
Number of hourly rates quoted 65 110 91
City of London median hourly rate £20.00 £18.70 £17.00
Median hourly rate % change year-on-year +6.95% +10.00% -2.86%
10th Percentile £12.04 £13.00 £11.25
90th Percentile £50.47 £25.70 £30.75
Central London median hourly rate £20.50 £18.70 £18.10
% change year-on-year +9.63% +3.31% +5.19%

Senior JavaScript Developer
Job Vacancy Trend in the City of London

Job postings that featured Senior JavaScript Developer in the job title as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for Senior JavaScript Developer in the City of London

Senior JavaScript Developer
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Senior JavaScript Developer in the City of London.

Contractor daily rate trend for Senior JavaScript Developer in the City of London

Senior JavaScript Developer
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Senior JavaScript Developer in the City of London over the 6 months to 9 December 2019.

Contractor daily rate histogram for Senior JavaScript Developer in the City of London

Senior JavaScript Developer Skill Set
Top 30 Co-occurring IT Skills in the City of London

For the 6 months to 9 December 2019, Senior JavaScript Developer contract jobs required the following IT skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region featuring Senior JavaScript Developer in the job title.

1 10 (100.00%) JavaScript
2 8 (80.00%) Agile Software Development
2 8 (80.00%) CSS
3 5 (50.00%) HTML
4 4 (40.00%) Fintech
4 4 (40.00%) Finance
5 3 (30.00%) Scrum
5 3 (30.00%) Software Engineering
5 3 (30.00%) AWS
5 3 (30.00%) React
5 3 (30.00%) webpack
5 3 (30.00%) ES6
5 3 (30.00%) Babel
5 3 (30.00%) Sass
5 3 (30.00%) AngularJS
5 3 (30.00%) DevOps
6 2 (20.00%) GCP
6 2 (20.00%) Wealth Management
6 2 (20.00%) Fusebox
6 2 (20.00%) Azure
6 2 (20.00%) TypeScript
6 2 (20.00%) BDD
6 2 (20.00%) Node.js
6 2 (20.00%) Vue.js
6 2 (20.00%) Software Delivery
6 2 (20.00%) Kanban
6 2 (20.00%) Google
6 2 (20.00%) TDD
6 2 (20.00%) Pair Programming
6 2 (20.00%) Customer-Centricity

Senior JavaScript Developer Skill Set
Co-occurring IT Skills in the City of London 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 1 (10.00%) Confluence
Cloud Services
1 3 (30.00%) AWS
2 2 (20.00%) Azure
2 2 (20.00%) GCP
3 1 (10.00%) Serverless
Database & Business Intelligence
1 1 (10.00%) Big Data
1 1 (10.00%) Blockchain
Development Applications
1 3 (30.00%) Babel
1 3 (30.00%) webpack
2 1 (10.00%) Git (software)
2 1 (10.00%) Jasmine
2 1 (10.00%) JIRA
2 1 (10.00%) Mocha
General
1 4 (40.00%) Finance
2 1 (10.00%) Banking
Libraries, Frameworks & Software Standards
1 8 (80.00%) CSS
2 5 (50.00%) HTML
3 3 (30.00%) AngularJS
3 3 (30.00%) React
3 3 (30.00%) Sass
4 2 (20.00%) Fusebox
4 2 (20.00%) Node.js
4 2 (20.00%) Vue.js
5 1 (10.00%) Jest
5 1 (10.00%) jQuery
5 1 (10.00%) JSLint
5 1 (10.00%) JSON
5 1 (10.00%) OAuth
5 1 (10.00%) OAuth2
5 1 (10.00%) OpenID
5 1 (10.00%) REST
5 1 (10.00%) Spring
5 1 (10.00%) Web Services
5 1 (10.00%) XML
5 1 (10.00%) XSLT
Operating Systems
1 1 (10.00%) Linux
Processes & Methodologies
1 8 (80.00%) Agile Software Development
2 4 (40.00%) Fintech
3 3 (30.00%) DevOps
3 3 (30.00%) Scrum
3 3 (30.00%) Software Engineering
4 2 (20.00%) BDD
4 2 (20.00%) Customer-Centricity
4 2 (20.00%) Kanban
4 2 (20.00%) Pair Programming
4 2 (20.00%) Software Delivery
4 2 (20.00%) TDD
4 2 (20.00%) Wealth Management
5 1 (10.00%) API Development
5 1 (10.00%) API Integration
5 1 (10.00%) E-Commerce
5 1 (10.00%) Front End Development
5 1 (10.00%) Microservices
5 1 (10.00%) Technical Leadership
Programming Languages
1 10 (100.00%) JavaScript
2 3 (30.00%) ES6
3 2 (20.00%) TypeScript
4 1 (10.00%) Java
4 1 (10.00%) JSX
4 1 (10.00%) SQL
Vendors
1 2 (20.00%) Google
2 1 (10.00%) WSO2