The following table provides summary statistics for contract job vacancies with a requirement for D3.js skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited D3.js over the 3 months to 22 June 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.

Data-Driven Documents (D3)
UK
3 months to
22 Jun 2017
Same period 2016 Same period 2015
Rank 443 533 572
Rank change year-on-year +90 +39  
Contract jobs citing D3.js 174 112 71
As % of all contract IT jobs advertised in the UK 0.37% 0.21% 0.13%
As % of the Libraries, Frameworks & Software Standards category 1.15% 0.73% 0.46%
Number of daily rates quoted 125 82 60
Median daily rate £500 £450 £450
Median daily rate % change year-on-year +11.11% -  
90% offered a daily rate of more than £378 £341 £350
10% offered a daily rate of more than £600 £550 £600
UK excluding London median daily rate £400 £398 £375
% change year-on-year +0.62% +6.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

D3.js is in the industry standards, technical specifications and software library and framework skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
UK
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 15082 15298 15416
As % of all contract IT job vacancies advertised in the UK 32.18% 28.37% 27.42%
Number of daily rates quoted 10422 10796 10312
Median daily rate £430 £420 £388
Median daily rate % change year-on-year +2.38% +8.38%  
90% offered a daily rate of more than £315 £300 £285
10% offered a daily rate of more than £580 £550 £550
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 204 179 206
Median hourly rate £41.50 £36.00 £35.00
Median hourly rate % change year-on-year +15.27% +2.85%  
90% offered a hourly rate of more than £16.08 £16.00 £17.50
10% offered a hourly rate of more than £52.50 £50.00 £55.00
UK excluding London median hourly rate £42.50 £36.00 £38.89
% change year-on-year +18.05% -7.41%  

D3.js
Job Vacancy Trend

The job posting trend of jobs advertised citing D3.js as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for D3.js in the UK

D3.js
Contractor Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing D3.js.

Contractor daily rate trend for D3.js in the UK

D3.js
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing D3.js over the 3 months to 22 June 2017.

Contractor daily rate histogram for D3.js in the UK

D3.js
Top 30 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing D3.js within the UK over the 3 months to 22 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +101 165 £500 +11.11% 40
London +81 134 £531 +18.05% 22
City of London +22 24 £575 +24.32% 2
East Midlands - 14 £400 -
Derbyshire - 11 £400 -
Derby - 11 £400 -
South East +26 9 £450 -10.00% 10
Scotland +38 8 £315 -16.00% 4
Edinburgh +20 7 £315 -25.88%
South West +6 3 £325 -13.33% 3
Croydon - 3 £400 -
Berkshire - 3 £450 - 4
Hampshire - 3 £450 - 1
Yorkshire +9 2 - -
Surrey +3 2 - - 1
Devon - 2 £325 -
Birmingham - 2 £400 -
Staines - 2 - -
West Midlands - 2 £400 - 1
Moorgate - 2 £525 -
Newcastle upon Tyne +72 1 - -
Tyne and Wear +71 1 - -
North East +63 1 - -
West Yorkshire +18 1 - -
Leeds +10 1 - -
Sheffield +10 1 - -
South Yorkshire +9 1 - -
Glasgow +8 1 - - 2
Hertfordshire 0 1 £340 -32.00% 1
East of England -4 1 £340 -32.00% 3

For the 6 months to 22 June 2017, IT contractor jobs citing D3.js also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads with a requirement for D3.js.

1 242 (81.48%) JavaScript
2 171 (57.58%) HTML
3 165 (55.56%) CSS
4 147 (49.49%) AngularJS
5 130 (43.77%) Visualisation
6 127 (42.76%) Agile Software Development
7 118 (39.73%) HTML5
8 108 (36.36%) CSS3
9 99 (33.33%) Front End Development
10 93 (31.31%) Finance
11 89 (29.97%) Data Visualisation
12 88 (29.63%) React
13 74 (24.92%) Node.js
14 71 (23.91%) Sass
15 66 (22.22%) User Experience
16 62 (20.88%) Java
17 60 (20.20%) Analytics
18 59 (19.87%) Scrum
19 56 (18.86%) Banking
20 54 (18.18%) SQL
20 54 (18.18%) Big Data
21 53 (17.85%) TDD
22 51 (17.17%) Web Development
22 51 (17.17%) jQuery
23 47 (15.82%) Python
24 45 (15.15%) Git (software)
25 42 (14.14%) ES6
26 40 (13.47%) Highcharts JS
26 40 (13.47%) LESS
26 40 (13.47%) Jasmine

D3.js
Co-occurring IT Skills 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 18 (6.06%) Apache Spark
2 16 (5.39%) Elasticsearch
3 14 (4.71%) Confluence
4 10 (3.37%) SharePoint
5 8 (2.69%) WebSphere
6 7 (2.36%) JBoss
6 7 (2.36%) WebLogic
7 6 (2.02%) SAS
7 6 (2.02%) Tomcat
8 5 (1.68%) Apache
8 5 (1.68%) nginx
9 4 (1.35%) Apache Pig
9 4 (1.35%) CMS
10 3 (1.01%) Cloud Foundry
10 3 (1.01%) EPiServer
10 3 (1.01%) Liferay
10 3 (1.01%) Sitecore CMS
11 2 (0.67%) Apache Solr
11 2 (0.67%) WebLogic Portal
11 2 (0.67%) WebSphere Portal
Applications
1 9 (3.03%) Microsoft Excel
2 5 (1.68%) Spreadsheet
3 4 (1.35%) Adobe Illustrator
4 2 (0.67%) InDesign
4 2 (0.67%) OmniGraffle
4 2 (0.67%) Photoshop
5 1 (0.34%) Adobe Creative Suite
5 1 (0.34%) Stata
Business Applications
1 3 (1.01%) Eloqua
2 1 (0.34%) SAP Oil and Gas
Cloud Services
1 27 (9.09%) Amazon AWS
2 6 (2.02%) Google Cloud Platform
2 6 (2.02%) Microsoft Azure
3 5 (1.68%) Cloud Computing
4 4 (1.35%) SaaS
5 3 (1.01%) Amazon EC2
5 3 (1.01%) Amazon S3
6 2 (0.67%) Adobe Creative Cloud
6 2 (0.67%) GitHub
6 2 (0.67%) Google Analytics
6 2 (0.67%) Slack
7 1 (0.34%) Flurry Analytics
Communications & Networking
1 7 (2.36%) HTTP
1 7 (2.36%) Network Security
2 2 (0.67%) DSL
2 2 (0.67%) Internet
2 2 (0.67%) Peer-to-Peer Networking
2 2 (0.67%) Skype
2 2 (0.67%) SNA
Database & Business Intelligence
1 54 (18.18%) Big Data
2 33 (11.11%) Hadoop
3 27 (9.09%) MongoDB
4 25 (8.42%) NoSQL
5 17 (5.72%) QlikView
6 16 (5.39%) SQL Server Reporting Services
7 14 (4.71%) BusinessObjects
7 14 (4.71%) Power BI
7 14 (4.71%) SQL Server
8 10 (3.37%) Relational Database
9 9 (3.03%) Apache Hive
10 7 (2.36%) OLAP
10 7 (2.36%) PostgreSQL
10 7 (2.36%) PowerPivot
10 7 (2.36%) SQL Server Integration Services
11 6 (2.02%) Apache Cassandra
11 6 (2.02%) KDB
11 6 (2.02%) Spotfire
12 5 (1.68%) HBase
12 5 (1.68%) MS Access
Development Applications
1 45 (15.15%) Git (software)
2 40 (13.47%) Jasmine
3 38 (12.79%) JIRA
4 34 (11.45%) Grunt
5 29 (9.76%) Mocha
6 20 (6.73%) gulp
7 18 (6.06%) Protractor
8 16 (5.39%) Bower
8 16 (5.39%) Selenium
9 15 (5.05%) Bitbucket
10 12 (4.04%) Karma Test Runner
10 12 (4.04%) webpack
11 10 (3.37%) Visual Studio
12 9 (3.03%) QUnit
12 9 (3.03%) Subversion
13 8 (2.69%) Sinon.JS
14 5 (1.68%) Darcs
14 5 (1.68%) Maven
14 5 (1.68%) Vagrant
14 5 (1.68%) VSS/SourceSafe
General
1 93 (31.31%) Finance
2 56 (18.86%) Banking
3 27 (9.09%) Investment Banking
4 12 (4.04%) Front Office
5 10 (3.37%) Telecoms
6 8 (2.69%) Retail
7 5 (1.68%) Games
7 5 (1.68%) Marketing
7 5 (1.68%) Retail Banking
8 3 (1.01%) Advertising
8 3 (1.01%) Publishing
9 2 (0.67%) Manufacturing
10 1 (0.34%) Automotive
10 1 (0.34%) Electronics
10 1 (0.34%) German Language
10 1 (0.34%) Military
Job Titles
1 211 (71.04%) Developer
2 100 (33.67%) JavaScript Developer
3 88 (29.63%) Front End Developer (Client-Side Developer)
4 52 (17.51%) Angular Developer
5 33 (11.11%) UI Developer
6 23 (7.74%) Senior Developer
7 21 (7.07%) HTML Developer
8 15 (5.05%) HTML CSS Developer
9 14 (4.71%) Data Visualisation Developer
9 14 (4.71%) Full Stack Developer
9 14 (4.71%) Senior JavaScript Developer
9 14 (4.71%) Web Developer
10 13 (4.38%) Delivery Manager
10 13 (4.38%) Designer
10 13 (4.38%) Java Developer
11 12 (4.04%) Analyst
11 12 (4.04%) Consultant
11 12 (4.04%) Python Developer
12 11 (3.70%) Data Scientist
13 10 (3.37%) Senior Front-End Developer
Libraries, Frameworks & Software Standards
1 171 (57.58%) HTML
2 165 (55.56%) CSS
3 147 (49.49%) AngularJS
4 118 (39.73%) HTML5
5 108 (36.36%) CSS3
6 88 (29.63%) React
7 74 (24.92%) Node.js
8 71 (23.91%) Sass
9 51 (17.17%) jQuery
10 40 (13.47%) Highcharts JS
10 40 (13.47%) JSON
10 40 (13.47%) LESS
11 36 (12.12%) Angular 2
12 34 (11.45%) Redux
13 27 (9.09%) RESTful
14 25 (8.42%) Twitter Bootstrap
15 23 (7.74%) SVG
16 22 (7.41%) REST
17 21 (7.07%) Spring
17 21 (7.07%) WebSockets
Miscellaneous
1 66 (22.22%) User Experience
2 39 (13.13%) Fintech
3 22 (7.41%) Greenfield Project
4 15 (5.05%) Foreign Exchange (FX)
5 13 (4.38%) Computer Science
6 12 (4.04%) Enterprise Software
7 11 (3.70%) Analytical Skills
7 11 (3.70%) Fixed Income
8 10 (3.37%) Hedge funds
8 10 (3.37%) Mobile App
9 9 (3.03%) Equities
10 8 (2.69%) Algorithms
10 8 (2.69%) Data Structures
11 7 (2.36%) Graphic Design
12 6 (2.02%) Cyberthreat
13 5 (1.68%) Derivative
13 5 (1.68%) Management Information System
13 5 (1.68%) Mobile Banking
14 3 (1.01%) Cloud Native
15 2 (0.67%) Grid Computing
Operating Systems
1 13 (4.38%) Unix
2 8 (2.69%) Android
2 8 (2.69%) Linux
3 2 (0.67%) Apple iOS
4 1 (0.34%) CentOS
4 1 (0.34%) Windows
Processes & Methodologies
1 130 (43.77%) Visualisation
2 127 (42.76%) Agile Software Development
3 99 (33.33%) Front End Development
4 89 (29.97%) Data Visualisation
5 60 (20.20%) Analytics
6 59 (19.87%) Scrum
7 53 (17.85%) TDD
8 51 (17.17%) Web Development
9 39 (13.13%) Responsive Web Design
10 32 (10.77%) Business Intelligence
11 31 (10.44%) Machine Learning
12 23 (7.74%) Mathematics
13 22 (7.41%) Kanban
14 21 (7.07%) Unit Testing
15 20 (6.73%) BDD
15 20 (6.73%) Web Design
16 19 (6.40%) Data Analytics
17 18 (6.06%) OO
18 17 (5.72%) Stakeholder Management
19 16 (5.39%) MVC
Programming Languages
1 242 (81.48%) JavaScript
2 62 (20.88%) Java
3 54 (18.18%) SQL
4 47 (15.82%) Python
5 42 (14.14%) ES6
6 26 (8.75%) R
7 23 (7.74%) Scala
8 20 (6.73%) C#
9 18 (6.06%) C++
10 10 (3.37%) TypeScript
11 8 (2.69%) Shell Script
12 6 (2.02%) Apple Swift
12 6 (2.02%) Objective-C
12 6 (2.02%) VB
13 5 (1.68%) Bash Shell
13 5 (1.68%) MATLAB
13 5 (1.68%) VC++
14 4 (1.35%) GraphQL
14 4 (1.35%) Perl
14 4 (1.35%) PL/SQL
Qualifications
1 28 (9.43%) Degree
2 5 (1.68%) PhD
2 5 (1.68%) Security Cleared
3 4 (1.35%) Computer Science Degree
3 4 (1.35%) Master's Degree
3 4 (1.35%) SC Cleared
4 1 (0.34%) BPSS Clearance
4 1 (0.34%) Sun Certification
Quality Assurance & Compliance
1 4 (1.35%) Data Quality
1 4 (1.35%) QA
System Software
1 8 (2.69%) Docker
2 5 (1.68%) Apache Flume
2 5 (1.68%) HDFS
Systems Management
1 8 (2.69%) Kibana
2 7 (2.36%) Ansible
3 6 (2.02%) Opscode Chef
4 3 (1.01%) ITRS Geneos
5 1 (0.34%) BladeLogic
5 1 (0.34%) Control-M
Vendors
1 19 (6.40%) Oracle
1 19 (6.40%) Tableau
2 13 (4.38%) Google
2 13 (4.38%) SAP
3 7 (2.36%) Microsoft
4 5 (1.68%) Adobe
5 4 (1.35%) Netezza
5 4 (1.35%) Sybase
5 4 (1.35%) Teradata
6 3 (1.01%) Marketo
6 3 (1.01%) Sitecore
7 2 (0.67%) ATG
7 2 (0.67%) Atlassian
7 2 (0.67%) Cognos
8 1 (0.34%) Ab Initio
8 1 (0.34%) Calypso
8 1 (0.34%) Informatica
8 1 (0.34%) MicroStrategy
8 1 (0.34%) Murex
8 1 (0.34%) Sun
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