The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for ECMAScript skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited ECMAScript over the 3 months to 27 March 2017 with a comparison to the same period in the previous 2 years.

3 months to
27 Mar 2017
Same period 2016 Same period 2015
ECMAScript
London / City of London
Rank 217 269 320
Rank change year-on-year +52 +51  
Permanent jobs citing ECMAScript 2 1 2
As % of all permanent IT jobs advertised in the City of London 0.040% 0.014% 0.019%
As % of the Programming Languages category 0.070% 0.025% 0.039%
Number of salaries quoted 2 1 2
Median salary £46,250 £75,000 £60,000
Median salary % change year-on-year -38.33% +25.00%  
90% offered a salary of more than £45,250 £75,000 £54,000
10% offered a salary of more than £47,250 £75,000 £66,000
UK excluding London median salary £40,000 £45,000 -
% change year-on-year -11.11% -  

ECMAScript is in the programming language skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for programming language skills.

Programming Language Skills
City of London
Permanent job vacancies with a requirement for programming language skills 2847 3928 5180
As % of all permanent IT job vacancies advertised in the City of London 56.30% 55.36% 49.76%
Number of salaries quoted 2592 3510 4560
Median salary £62,500 £57,500 £55,000
Median salary % change year-on-year +8.69% +4.54%  
90% offered a salary of more than £40,000 £40,000 £37,500
10% offered a salary of more than £90,000 £77,500 £82,500
UK excluding London median salary £41,000 £40,500 £40,000
% change year-on-year +1.23% +1.25%  

ECMAScript
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing ECMAScript as a proportion of all permanent or contract IT jobs with a match in the Programming Languages category.

Job vacancy trend for ECMAScript in the City of London

ECMAScript
Salary Trend in the City of London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing ECMAScript in the City of London.

Salary trend for ECMAScript in the City of London

ECMAScript
Top 26 Related IT Skills in the City of London

For the 6 months to 27 March 2017, IT jobs citing ECMAScript also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the City of London region with a requirement for ECMAScript.

1 5 (100.00%) HTML
1 5 (100.00%) JavaScript
1 5 (100.00%) JSON
1 5 (100.00%) React
1 5 (100.00%) Bitbucket
2 3 (60.00%) AngularJS
2 3 (60.00%) Games
2 3 (60.00%) Agile Software Development
2 3 (60.00%) TDD
2 3 (60.00%) Node.js
2 3 (60.00%) GitHub
2 3 (60.00%) CSS
3 2 (40.00%) DOM
3 2 (40.00%) Financial Institution
3 2 (40.00%) Finance
3 2 (40.00%) Git (software)
3 2 (40.00%) RESTful
3 2 (40.00%) HTML5
3 2 (40.00%) Data Structures
3 2 (40.00%) webpack
3 2 (40.00%) DOM Manipulation/Scripting
3 2 (40.00%) Front End Development
3 2 (40.00%) Isomorphic JavaScript
3 2 (40.00%) Babel
3 2 (40.00%) Wireframes
3 2 (40.00%) Redux

ECMAScript
Top Related 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 3 (60.00%) GitHub
Development Applications
1 5 (100.00%) Bitbucket
2 2 (40.00%) Babel
2 2 (40.00%) Git (software)
2 2 (40.00%) webpack
General
1 3 (60.00%) Games
2 2 (40.00%) Finance
2 2 (40.00%) Financial Institution
Job Titles
1 5 (100.00%) Developer
1 5 (100.00%) JavaScript Developer
2 3 (60.00%) Senior Developer
2 3 (60.00%) Senior JavaScript Developer
Libraries, Frameworks & Software Standards
1 5 (100.00%) HTML
1 5 (100.00%) JSON
1 5 (100.00%) React
2 3 (60.00%) AngularJS
2 3 (60.00%) CSS
2 3 (60.00%) Node.js
3 2 (40.00%) DOM
3 2 (40.00%) HTML5
3 2 (40.00%) Redux
3 2 (40.00%) RESTful
Miscellaneous
1 2 (40.00%) Data Structures
Processes & Methodologies
1 3 (60.00%) Agile Software Development
1 3 (60.00%) TDD
2 2 (40.00%) DOM Manipulation/Scripting
2 2 (40.00%) Front End Development
2 2 (40.00%) Isomorphic JavaScript
2 2 (40.00%) Wireframes
Programming Languages
1 5 (100.00%) JavaScript