Period
to 24 November 2017

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for ECMAScript skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited ECMAScript over the 6 months to 24 November 2017 with a comparison to the 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.

ECMAScript
Central London > City of London
6 months to
24 Nov 2017
Same period 2016 Same period 2015
Rank 232 232 270
Rank change year-on-year 0 +38 -
Contract jobs citing ECMAScript 9 8 1
As % of all contract IT jobs advertised in the City of London 0.13% 0.12% 0.011%
As % of the Programming Languages category 0.24% 0.24% 0.024%
Number of daily rates quoted 7 4 1
City of London median daily rate £525 £400 £275
Median daily rate % change year-on-year +31.25% +45.45% -
10th Percentile £435 £315 £238
90th Percentile £565 £560 £313
Central London median daily rate £513 £400 £275
% change year-on-year +28.13% +45.45% -
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

ECMAScript is in the Programming Languages category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for coding skills.

All Programming Languages
City of London
Contract vacancies with a requirement for coding skills 3763 3365 4243
As % of all contract IT jobs advertised in the City of London 52.62% 50.47% 46.68%
Number of daily rates quoted 3135 2829 3555
City of London median daily rate £525 £475 £475
Median daily rate % change year-on-year +10.53% - +5.56%
10th Percentile £363 £325 £313
90th Percentile £688 £652 £663
Central London median daily rate £513 £475 £475
% change year-on-year +7.89% - +5.56%
Number of hourly rates quoted 14 10 22
City of London median hourly rate £22.99 £27.50 £26.09
Median hourly rate % change year-on-year -16.39% +5.42% +30.43%
10th Percentile £15.12 £16.06 £16.10
90th Percentile £39.10 £55.19 £53.70
Central London median hourly rate £24.49 £27.50 £26.09
% change year-on-year -10.96% +5.42% +30.43%

ECMAScript
Job Vacancy Trend in the City of London

Job postings citing ECMAScript as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for ECMAScript in the City of London

ECMAScript
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 ECMAScript in the City of London.

Contractor daily rate trend for ECMAScript in the City of London

ECMAScript
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing ECMAScript in the City of London over the 6 months to 24 November 2017.

Contractor daily rate histogram for ECMAScript in the City of London

For the 6 months to 24 November 2017, IT contractor jobs citing ECMAScript also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the City of London region with a requirement for ECMAScript.

1 9 (100.00%) JavaScript
2 8 (88.89%) JSON
2 8 (88.89%) React
2 8 (88.89%) webpack
2 8 (88.89%) Babel
2 8 (88.89%) Redux
2 8 (88.89%) npm
3 7 (77.78%) ES6
3 7 (77.78%) REST
3 7 (77.78%) CSS
4 6 (66.67%) HTML
4 6 (66.67%) HTML5
4 6 (66.67%) CSS3
4 6 (66.67%) WebSockets
4 6 (66.67%) React Native
4 6 (66.67%) Web Application Development
4 6 (66.67%) Dependency Management
4 6 (66.67%) Performance Optimisation
4 6 (66.67%) Node.js
5 4 (44.44%) JIRA
5 4 (44.44%) Atlassian
5 4 (44.44%) Scrum
5 4 (44.44%) Agile Software Development
6 3 (33.33%) Apple iOS
6 3 (33.33%) Android
6 3 (33.33%) Front End Development
7 2 (22.22%) DOM Manipulation/Scripting
7 2 (22.22%) Data Structures
7 2 (22.22%) Immutable.js
7 2 (22.22%) MVC

ECMAScript
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 8 (88.89%) npm
Database & Business Intelligence
1 1 (11.11%) SQL Server
1 1 (11.11%) SQL Server 2012
1 1 (11.11%) SQL Server Integration Services
Development Applications
1 8 (88.89%) Babel
1 8 (88.89%) webpack
2 4 (44.44%) JIRA
3 1 (11.11%) Jenkins
3 1 (11.11%) Visual Studio
3 1 (11.11%) Visual Studio Team System
Job Titles
1 9 (100.00%) Developer
2 3 (33.33%) JavaScript Developer
2 3 (33.33%) Senior Developer
2 3 (33.33%) Senior JavaScript Developer
3 1 (11.11%) .NET Developer
3 1 (11.11%) ASP.NET Developer
3 1 (11.11%) Full Stack Developer
3 1 (11.11%) VB.NET Developer
3 1 (11.11%) VB.NET/ASP.NET Developer
Libraries, Frameworks & Software Standards
1 8 (88.89%) JSON
1 8 (88.89%) React
1 8 (88.89%) Redux
2 7 (77.78%) CSS
2 7 (77.78%) REST
3 6 (66.67%) CSS3
3 6 (66.67%) HTML
3 6 (66.67%) HTML5
3 6 (66.67%) Node.js
3 6 (66.67%) React Native
3 6 (66.67%) WebSockets
4 2 (22.22%) .NET
4 2 (22.22%) DOM
4 2 (22.22%) Immutable.js
4 2 (22.22%) RESTful
5 1 (11.11%) .NET Framework
5 1 (11.11%) ASP.NET
5 1 (11.11%) ASP.NET MVC
5 1 (11.11%) Code First Entity Framework
5 1 (11.11%) Web Services
Miscellaneous
1 2 (22.22%) Data Structures
2 1 (11.11%) W3C
Operating Systems
1 3 (33.33%) Android
1 3 (33.33%) Apple iOS
Processes & Methodologies
1 6 (66.67%) Dependency Management
1 6 (66.67%) Performance Optimisation
1 6 (66.67%) Web Application Development
2 4 (44.44%) Agile Software Development
2 4 (44.44%) Scrum
3 3 (33.33%) Front End Development
4 2 (22.22%) DOM Manipulation/Scripting
4 2 (22.22%) MVC
5 1 (11.11%) Benchmarking
5 1 (11.11%) Isomorphic JavaScript
5 1 (11.11%) OO
5 1 (11.11%) OOP
5 1 (11.11%) Wireframes
Programming Languages
1 9 (100.00%) JavaScript
2 7 (77.78%) ES6
3 1 (11.11%) C#
3 1 (11.11%) TypeScript
3 1 (11.11%) VB.NET
Vendors
1 4 (44.44%) Atlassian
2 1 (11.11%) Microsoft