Period
to 20 October 2018

The median annual salary for a JavaScript Developer was £50,000 in advertised job vacancies in Hertfordshire during the 6 months to 20 October 2018.

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

JavaScript Developer
East of England > Hertfordshire
6 months to
20 Oct 2018
Same period 2017 Same period 2016
Rank 168 119 134
Rank change year-on-year -49 +15 +37
Permanent jobs requiring a JavaScript Developer 38 104 89
As % of all permanent IT jobs advertised in Hertfordshire 0.95% 2.48% 2.03%
As % of the Job Titles category 0.98% 2.56% 2.09%
Number of salaries quoted 37 99 86
Hertfordshire median annual salary £50,000 £50,000 £55,000
Median salary % change year-on-year - -9.09% +29.41%
10th Percentile £38,750 £36,250 £37,500
90th Percentile £65,000 £66,500 £63,750
East of England median annual salary £45,000 £46,250 £47,500
% change year-on-year -2.70% -2.63% +11.76%

The following table is for comparison with the above and includes summary statistics for all permanent IT job vacancies advertised in Hertfordshire. 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 permanent jobs in our overall sample.

All Permanent IT Job Vacancies
Hertfordshire
Permanent vacancies in Hertfordshire with a recognized job title 3,892 4,067 4,251
% of permanent IT jobs with a recognized job title 97.40% 96.88% 96.81%
Number of salaries quoted 3,049 3,478 3,536
Hertfordshire median annual salary £47,500 £45,000 £46,750
Median salary % change year-on-year +5.56% -3.74% +3.89%
10th Percentile £26,250 £25,500 £25,750
90th Percentile £73,750 £70,000 £70,000
East of England median annual salary £45,000 £45,000 £45,000

JavaScript Developer
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for JavaScript Developer in Hertfordshire

JavaScript Developer
Salary Trend in Hertfordshire

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing JavaScript Developer in Hertfordshire.

Salary trend for JavaScript Developer in Hertfordshire

JavaScript Developer
Salary Histogram in Hertfordshire

The salary distribution of IT jobs citing JavaScript Developer in Hertfordshire over the 6 months to 20 October 2018.

Salary histogram for JavaScript Developer in Hertfordshire

JavaScript Developer
Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing JavaScript Developer within the Hertfordshire region over the 6 months to 20 October 2018. 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
Harpenden - 11 £45,000 -
Hemel Hempstead +13 4 £55,000 +29.41%
St Albans -10 4 £58,750 +11.90% 1
Hatfield -6 3 £47,500 -13.64%
Potters Bar - 3 £65,000 -
Welwyn Garden City -29 2 £48,750 -35.00%
Watford -40 2 £50,000 - 4
Abbots Langley - 2 £58,750 - 1
Rickmansworth -5 1 £50,000 +25.00%
JavaScript Developer
East of England

JavaScript Developer Skill Set
Top 30 Co-occurring IT Skills in Hertfordshire

For the 6 months to 20 October 2018, JavaScript Developer job roles required the following IT skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the Hertfordshire region featuring JavaScript Developer in the job title.

1 38 (100.00%) JavaScript
2 31 (81.58%) HTML
3 30 (78.95%) CSS
4 28 (73.68%) AngularJS
5 25 (65.79%) React
5 25 (65.79%) Agile Software Development
6 22 (57.89%) Git (software)
7 21 (55.26%) jQuery
7 21 (55.26%) TDD
8 19 (50.00%) Front End Development
9 18 (47.37%) HTML5
9 18 (47.37%) Sass
10 16 (42.11%) C#
11 13 (34.21%) .NET
11 13 (34.21%) RESTful
12 12 (31.58%) Semantic HTML
12 12 (31.58%) Jasmine
12 12 (31.58%) Karma Test Runner
12 12 (31.58%) Finance
12 12 (31.58%) gulp
12 12 (31.58%) ES6
13 11 (28.95%) React Native
13 11 (28.95%) Handlebars
13 11 (28.95%) Redux
13 11 (28.95%) npm
13 11 (28.95%) Due Diligence
13 11 (28.95%) Validation
13 11 (28.95%) ASP.NET
13 11 (28.95%) HTTP
13 11 (28.95%) TypeScript

JavaScript Developer Skill Set
Co-occurring IT Skills in Hertfordshire 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:

Applications
1 1 (2.63%) Photoshop
Cloud Services
1 11 (28.95%) npm
2 5 (13.16%) Amazon AWS
3 3 (7.89%) Amazon EC2
3 3 (7.89%) AWS Lambda
3 3 (7.89%) Serverless
4 2 (5.26%) Microsoft Azure
Communications & Networking
1 11 (28.95%) HTTP
2 3 (7.89%) Internet
Database & Business Intelligence
1 8 (21.05%) SQL Server
2 6 (15.79%) Relational Database
3 3 (7.89%) Amazon DynamoDB
4 2 (5.26%) MySQL
4 2 (5.26%) PostgreSQL
4 2 (5.26%) RDBMS
Development Applications
1 22 (57.89%) Git (software)
2 12 (31.58%) gulp
2 12 (31.58%) Jasmine
2 12 (31.58%) Karma Test Runner
3 11 (28.95%) webpack
4 4 (10.53%) Atlassian Bamboo
4 4 (10.53%) Moq
4 4 (10.53%) NUnit
4 4 (10.53%) Octopus Deploy
5 3 (7.89%) Gradle
5 3 (7.89%) Maven
6 2 (5.26%) Visual Studio
7 1 (2.63%) JIRA
7 1 (2.63%) Mercurial
7 1 (2.63%) Xcode
General
1 12 (31.58%) Finance
2 1 (2.63%) Marketing
Libraries, Frameworks & Software Standards
1 31 (81.58%) HTML
2 30 (78.95%) CSS
3 28 (73.68%) AngularJS
4 25 (65.79%) React
5 21 (55.26%) jQuery
6 18 (47.37%) HTML5
6 18 (47.37%) Sass
7 13 (34.21%) .NET
7 13 (34.21%) RESTful
8 12 (31.58%) Semantic HTML
9 11 (28.95%) ASP.NET
9 11 (28.95%) Handlebars
9 11 (28.95%) React Native
9 11 (28.95%) Redux
10 8 (21.05%) Node.js
11 7 (18.42%) .NET Framework
11 7 (18.42%) Vue.js
12 5 (13.16%) ASP.NET MVC
12 5 (13.16%) CSS3
13 4 (10.53%) Ninject
Miscellaneous
1 11 (28.95%) Media Streaming
1 11 (28.95%) Mobile App
2 9 (23.68%) User Experience
3 2 (5.26%) Robotics
4 1 (2.63%) Fintech
4 1 (2.63%) W3C
Processes & Methodologies
1 25 (65.79%) Agile Software Development
2 21 (55.26%) TDD
3 19 (50.00%) Front End Development
4 11 (28.95%) Due Diligence
4 11 (28.95%) Validation
5 8 (21.05%) Web Development
6 6 (15.79%) E-Commerce
6 6 (15.79%) MVC
6 6 (15.79%) SDLC
7 5 (13.16%) Scrum
7 5 (13.16%) Software Engineering
8 4 (10.53%) Continuous Integration
8 4 (10.53%) DevOps
8 4 (10.53%) Problem-Solving
8 4 (10.53%) Unit Testing
9 3 (7.89%) Continuous Delivery
9 3 (7.89%) Dependency Injection
9 3 (7.89%) Microservices
9 3 (7.89%) Multithreading
9 3 (7.89%) Prototyping
Programming Languages
1 38 (100.00%) JavaScript
2 16 (42.11%) C#
3 12 (31.58%) ES6
4 11 (28.95%) TypeScript
5 9 (23.68%) Java
6 7 (18.42%) SQL
7 3 (7.89%) Scala
8 2 (5.26%) T-SQL
9 1 (2.63%) C
9 1 (2.63%) C++
9 1 (2.63%) Fortran
9 1 (2.63%) Pascal
System Software
1 3 (7.89%) Docker
Vendors
1 5 (13.16%) Microsoft
2 1 (2.63%) hybris