Period
to 11 August 2020

The median contractor rate for a Senior JavaScript Developer was £625 per day in advertised job vacancies in the City of London during the 6 months to 11 August 2020.

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
11 Aug 2020
Same period 2019 Same period 2018
Rank 123 233 235
Rank change year-on-year +110 +2 -26
Contract jobs requiring a Senior JavaScript Developer 6 8 23
As % of all contract jobs advertised in the City of London 0.27% 0.12% 0.33%
As % of the Job Titles category 0.29% 0.13% 0.34%
Number of daily rates quoted 7 8 19
Median daily rate £625 £494 £600
Median daily rate % change year-on-year +26.58% -17.71% +11.63%
10th Percentile £547 £321 £513
90th Percentile £788 £556 £660
Central London median daily rate £600 £550 £550
% change year-on-year +9.09% - +5.77%
Number of hourly rates quoted 0 0 0
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 2,037 6,080 6,676
% of contract IT jobs with a recognized job title 93.06% 93.93% 94.99%
Number of daily rates quoted 1,425 4,751 5,235
Median daily rate £510 £520 £500
Median daily rate % change year-on-year -1.92% +4.00% -
10th Percentile £313 £325 £313
90th Percentile £675 £675 £688
Central London median daily rate £500 £513 £500
% change year-on-year -2.44% +2.50% +1.52%
Number of hourly rates quoted 44 77 129
Median hourly rate £35.00 £21.00 £18.70
Median hourly rate % change year-on-year +66.67% +12.30% +7.56%
10th Percentile £13.28 £11.25 £13.25
90th Percentile £47.75 £57.90 £30.00
Median hourly rate £35.00 £21.00 £18.70
% change year-on-year +66.67% +12.30% +6.04%

Senior JavaScript Developer
Job Vacancy Trend in the City of London

Job postings that featured Senior JavaScript Developer in the job title as a proportion 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

3-month moving average daily rate quoted in jobs citing Senior JavaScript Developer in the City of London.

Daily rate trend for Senior JavaScript Developer in the City of London

Senior JavaScript Developer
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing Senior JavaScript Developer in the City of London over the 6 months to 11 August 2020.

Daily rate histogram for Senior JavaScript Developer in the City of London

Senior JavaScript Developer Skill Set
Top 26 Co-occurring IT Skills in the City of London

For the 6 months to 11 August 2020, 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 6 (100.00%) JavaScript
2 5 (83.33%) React
3 4 (66.67%) Node.js
3 4 (66.67%) Agile Software Development
4 3 (50.00%) B2B
4 3 (50.00%) Analytics
4 3 (50.00%) TypeScript
4 3 (50.00%) GraphQL
4 3 (50.00%) Redux
4 3 (50.00%) Greenfield Project
5 2 (33.33%) E-Commerce
6 1 (16.67%) Jest
6 1 (16.67%) SDLC
6 1 (16.67%) Kotlin
6 1 (16.67%) ES6
6 1 (16.67%) Front End Development
6 1 (16.67%) Kubernetes
6 1 (16.67%) PhantomJS
6 1 (16.67%) Jasmine
6 1 (16.67%) Software Engineering
6 1 (16.67%) AWS
6 1 (16.67%) NoSQL
6 1 (16.67%) SQL
6 1 (16.67%) CSS
6 1 (16.67%) HTML
6 1 (16.67%) Java

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:

Cloud Services
1 1 (16.67%) AWS
Database & Business Intelligence
1 1 (16.67%) NoSQL
Development Applications
1 1 (16.67%) Jasmine
1 1 (16.67%) PhantomJS
Libraries, Frameworks & Software Standards
1 5 (83.33%) React
2 4 (66.67%) Node.js
3 3 (50.00%) GraphQL
3 3 (50.00%) Redux
4 1 (16.67%) CSS
4 1 (16.67%) HTML
4 1 (16.67%) Jest
Miscellaneous
1 3 (50.00%) Greenfield Project
Processes & Methodologies
1 4 (66.67%) Agile Software Development
2 3 (50.00%) Analytics
2 3 (50.00%) B2B
3 2 (33.33%) E-Commerce
4 1 (16.67%) Front End Development
4 1 (16.67%) SDLC
4 1 (16.67%) Software Engineering
Programming Languages
1 6 (100.00%) JavaScript
2 3 (50.00%) TypeScript
3 1 (16.67%) ES6
3 1 (16.67%) Java
3 1 (16.67%) Kotlin
3 1 (16.67%) SQL
Systems Management
1 1 (16.67%) Kubernetes