The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for JSON skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JSON over the 3 months to 23 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.

JSON
London / City of London
3 months to
23 Jun 2017
Same period 2016 Same period 2015
Rank 86 87 106
Rank change year-on-year +1 +19  
Contract jobs citing JSON 81 80 100
As % of all contract IT jobs advertised in the City of London 2.45% 2.36% 1.72%
As % of the Libraries, Frameworks & Software Standards category 6.48% 6.80% 5.78%
Number of daily rates quoted 58 70 80
Median daily rate £500 £425 £425
Median daily rate % change year-on-year +17.64% -  
90% offered a daily rate of more than £393 £375 £325
10% offered a daily rate of more than £625 £525 £575
UK excluding London median daily rate £425 £400 £375
% change year-on-year +6.25% +6.66%  
Number of hourly rates quoted 1 0 4
Median hourly rate £26.80 - £19.72
UK excluding London median hourly rate £38.75 £29.14 £55.00
% change year-on-year +32.97% -47.01%  

JSON 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 advertised in the City of London with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
City of London
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 1250 1176 1729
As % of all contract IT job vacancies advertised in the City of London 37.88% 34.75% 29.75%
Number of daily rates quoted 1019 1007 1404
Median daily rate £500 £450 £430
Median daily rate % change year-on-year +11.00% +4.65%  
90% offered a daily rate of more than £360 £325 £315
10% offered a daily rate of more than £625 £575 £600
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 6 1 12
Median hourly rate £24.86 £20.00 £24.23
Median hourly rate % change year-on-year +24.30% -17.45%  
90% offered a hourly rate of more than £21.50 £20.00 £15.64
10% offered a hourly rate of more than £26.80 £20.00 £187.50
UK excluding London median hourly rate £42.50 £36.00 £40.00
% change year-on-year +18.05% -10.00%  

JSON
Job Vacancy Trend in the City of London

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

Job vacancy trend for JSON in the City of London

JSON
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 JSON in the City of London.

Contractor daily rate trend for JSON in the City of London

JSON
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing JSON in the City of London over the 3 months to 23 June 2017.

Contractor daily rate histogram for JSON in the City of London

JSON
Contractor Hourly Rate Trend in the City of London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing JSON in the City of London.

Contractor hourly rate trend for JSON in the City of London

For the 6 months to 23 June 2017, IT contractor jobs citing JSON 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 JSON.

1 74 (51.75%) REST
2 71 (49.65%) Agile Software Development
3 60 (41.96%) Java
4 55 (38.46%) XML
5 52 (36.36%) CSS
6 51 (35.66%) HTML
7 49 (34.27%) JavaScript
7 49 (34.27%) TDD
8 39 (27.27%) Web Services
9 38 (26.57%) SQL
10 34 (23.78%) Banking
11 33 (23.08%) jQuery
12 32 (22.38%) RESTful
13 31 (21.68%) Scrum
14 30 (20.98%) Finance
15 29 (20.28%) AngularJS
16 24 (16.78%) HTML5
16 24 (16.78%) BDD
17 23 (16.08%) Amazon AWS
17 23 (16.08%) Git (software)
17 23 (16.08%) Test Automation
18 22 (15.38%) Unit Testing
19 21 (14.69%) SOAP
19 21 (14.69%) Python
19 21 (14.69%) Android
19 21 (14.69%) Node.js
19 21 (14.69%) Jenkins
20 20 (13.99%) Front End Development
20 20 (13.99%) CSS3
20 20 (13.99%) Linux

JSON
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:

Application Platforms
1 9 (6.29%) Tomcat
2 8 (5.59%) Mule
3 6 (4.20%) Apache Solr
3 6 (4.20%) Apache Spark
3 6 (4.20%) IIS
3 6 (4.20%) WebLogic
4 5 (3.50%) Confluence
5 4 (2.80%) Elasticsearch
6 3 (2.10%) JBoss
6 3 (2.10%) Liferay
6 3 (2.10%) WordPress
7 2 (1.40%) CICS
7 2 (1.40%) Oracle SOA Suite
7 2 (1.40%) WebSphere
8 1 (0.70%) Apache
8 1 (0.70%) Apache TomEE
8 1 (0.70%) CMS
8 1 (0.70%) Drupal
8 1 (0.70%) Jupyter
8 1 (0.70%) nginx
Applications
1 5 (3.50%) Microsoft Excel
2 2 (1.40%) MS Visio
2 2 (1.40%) Spreadsheet
3 1 (0.70%) Adobe Illustrator
3 1 (0.70%) Photoshop
Business Applications
1 2 (1.40%) Workday HCM
2 1 (0.70%) Actimize
2 1 (0.70%) RMDS
Cloud Services
1 23 (16.08%) Amazon AWS
2 12 (8.39%) Microsoft Azure
3 5 (3.50%) GitHub
4 3 (2.10%) Google Play
5 2 (1.40%) Salesforce Service Cloud
6 1 (0.70%) Bluemix
6 1 (0.70%) Cloud Computing
6 1 (0.70%) Google Cloud Platform
6 1 (0.70%) Heroku
6 1 (0.70%) IBM Cloud
6 1 (0.70%) PaaS
6 1 (0.70%) SaaS
Communications & Networking
1 13 (9.09%) HTTP
2 4 (2.80%) TCP/IP
3 3 (2.10%) DNS
3 3 (2.10%) Internet
4 2 (1.40%) Intranet
4 2 (1.40%) MPLS
4 2 (1.40%) SSL
4 2 (1.40%) VPLS
5 1 (0.70%) Bluetooth
Database & Business Intelligence
1 18 (12.59%) NoSQL
2 14 (9.79%) Relational Database
3 13 (9.09%) Big Data
3 13 (9.09%) MongoDB
4 10 (6.99%) SQL Server
5 8 (5.59%) MySQL
6 7 (4.90%) Hadoop
7 6 (4.20%) Apache Cassandra
7 6 (4.20%) Hazelcast
8 4 (2.80%) PostgreSQL
8 4 (2.80%) QlikView
8 4 (2.80%) RDBMS
9 3 (2.10%) Apache Hive
10 2 (1.40%) BusinessObjects
10 2 (1.40%) HBase
10 2 (1.40%) Neo4j
10 2 (1.40%) OLTP
10 2 (1.40%) Qlik Sense
10 2 (1.40%) SQL Server 2008
10 2 (1.40%) SQLite
Development Applications
1 23 (16.08%) Git (software)
2 21 (14.69%) Jenkins
3 17 (11.89%) Cucumber
3 17 (11.89%) Selenium
4 16 (11.19%) JIRA
4 16 (11.19%) JUnit
5 14 (9.79%) Maven
6 8 (5.59%) Mockito
7 6 (4.20%) EasyMock
7 6 (4.20%) Gradle
7 6 (4.20%) Jasmine
7 6 (4.20%) Subversion
7 6 (4.20%) Visual Studio
8 5 (3.50%) Android Studio
8 5 (3.50%) Bitbucket
8 5 (3.50%) Capybara
8 5 (3.50%) gulp
8 5 (3.50%) Protractor
8 5 (3.50%) TeamCity
8 5 (3.50%) webpack
General
1 34 (23.78%) Banking
2 30 (20.98%) Finance
3 9 (6.29%) Investment Banking
4 5 (3.50%) Retail
5 4 (2.80%) Front Office
5 4 (2.80%) Manufacturing
6 3 (2.10%) Telecoms
7 2 (1.40%) Advertising
7 2 (1.40%) Games
7 2 (1.40%) Retail Banking
8 1 (0.70%) Corporate Banking
8 1 (0.70%) Law
8 1 (0.70%) Legal
8 1 (0.70%) Marketing
8 1 (0.70%) Publishing
Job Titles
1 109 (76.22%) Developer
2 33 (23.08%) Java Developer
3 26 (18.18%) Senior Developer
4 19 (13.29%) Android Developer
5 15 (10.49%) Front End Developer (Client-Side Developer)
6 11 (7.69%) Analyst
7 10 (6.99%) Angular Developer
7 10 (6.99%) iOS Developer
8 9 (6.29%) Scala Developer
9 8 (5.59%) Architect
9 8 (5.59%) JavaScript Developer
9 8 (5.59%) Senior Java Developer
10 7 (4.90%) Senior Scala Developer
10 7 (4.90%) Web Developer
11 6 (4.20%) Mobile Developer
12 5 (3.50%) Analyst Developer
12 5 (3.50%) Full Stack Developer
13 4 (2.80%) Consultant
13 4 (2.80%) Python Developer
13 4 (2.80%) Senior Web Developer
Libraries, Frameworks & Software Standards
1 74 (51.75%) REST
2 55 (38.46%) XML
3 52 (36.36%) CSS
4 51 (35.66%) HTML
5 39 (27.27%) Web Services
6 33 (23.08%) jQuery
7 32 (22.38%) RESTful
8 29 (20.28%) AngularJS
9 24 (16.78%) HTML5
10 21 (14.69%) Node.js
10 21 (14.69%) SOAP
11 20 (13.99%) CSS3
11 20 (13.99%) Spring
12 19 (13.29%) .NET
13 16 (11.19%) Ajax
13 16 (11.19%) Hibernate
13 16 (11.19%) React
14 15 (10.49%) Sass
15 11 (7.69%) .NET Framework
15 11 (7.69%) Spring Boot
Miscellaneous
1 16 (11.19%) User Experience
2 13 (9.09%) Analytical Skills
3 11 (7.69%) Enterprise Software
4 10 (6.99%) Foreign Exchange (FX)
5 9 (6.29%) Data Structures
5 9 (6.29%) Mobile App
6 7 (4.90%) Algorithms
6 7 (4.90%) Greenfield Project
7 6 (4.20%) iPad
7 6 (4.20%) Public Cloud
8 5 (3.50%) iPhone
8 5 (3.50%) Virtual Team
9 3 (2.10%) Fintech
9 3 (2.10%) Mainframe
9 3 (2.10%) Web 2.0
10 2 (1.40%) Computer Science
10 2 (1.40%) Equities
10 2 (1.40%) Grid Computing
10 2 (1.40%) VSAM
10 2 (1.40%) Wiki
Operating Systems
1 21 (14.69%) Android
2 20 (13.99%) Linux
3 15 (10.49%) Apple iOS
4 13 (9.09%) Unix
4 13 (9.09%) Windows
5 5 (3.50%) Windows Server
6 3 (2.10%) CentOS
6 3 (2.10%) Ubuntu
7 1 (0.70%) Red Hat Enterprise Linux
7 1 (0.70%) Windows Server 2012
Processes & Methodologies
1 71 (49.65%) Agile Software Development
2 49 (34.27%) TDD
3 31 (21.68%) Scrum
4 24 (16.78%) BDD
5 23 (16.08%) Test Automation
6 22 (15.38%) Unit Testing
7 20 (13.99%) Front End Development
8 19 (13.29%) Web Development
9 18 (12.59%) Android Development
9 18 (12.59%) Microservices
9 18 (12.59%) Multithreading
10 16 (11.19%) OO
11 15 (10.49%) Kanban
12 14 (9.79%) MVC
13 13 (9.09%) Software Engineering
14 11 (7.69%) UML
15 10 (6.99%) Continuous Integration
15 10 (6.99%) iOS Development
15 10 (6.99%) Open Source
16 9 (6.29%) Functional Programming
Programming Languages
1 60 (41.96%) Java
2 49 (34.27%) JavaScript
3 38 (26.57%) SQL
4 21 (14.69%) Python
5 15 (10.49%) C#
6 14 (9.79%) Scala
7 11 (7.69%) PHP
8 10 (6.99%) Apple Swift
9 9 (6.29%) Objective-C
10 8 (5.59%) PL/SQL
11 7 (4.90%) Bash Shell
11 7 (4.90%) Shell Script
12 6 (4.20%) R
13 5 (3.50%) T-SQL
14 4 (2.80%) C
14 4 (2.80%) C++
15 3 (2.10%) Go
15 3 (2.10%) Ruby
16 2 (1.40%) ES6
16 2 (1.40%) SOQL
Qualifications
1 4 (2.80%) Degree
2 3 (2.10%) SC Cleared
2 3 (2.10%) Security Cleared
3 1 (0.70%) CFA
3 1 (0.70%) Computer Science Degree
Quality Assurance & Compliance
1 12 (8.39%) QA
2 3 (2.10%) MiFID
3 1 (0.70%) Dodd-Frank
3 1 (0.70%) EMIR
System Software
1 3 (2.10%) Docker
2 1 (0.70%) Apache Flume
2 1 (0.70%) HDFS
2 1 (0.70%) Varnish
Systems Management
1 2 (1.40%) Ansible
1 2 (1.40%) MOM
2 1 (0.70%) Control-M
2 1 (0.70%) Kubernetes
2 1 (0.70%) Marathon
2 1 (0.70%) Mesos
2 1 (0.70%) Puppet
Vendors
1 14 (9.79%) Oracle
2 9 (6.29%) Microsoft
3 6 (4.20%) Telerik
3 6 (4.20%) Xamarin
4 5 (3.50%) Apple
4 5 (3.50%) Google
5 4 (2.80%) Salesforce.com
6 3 (2.10%) Informatica
6 3 (2.10%) MuleSoft
6 3 (2.10%) Red Hat
6 3 (2.10%) Reuters
7 2 (1.40%) Apigee
7 2 (1.40%) Atlassian
7 2 (1.40%) FXall
7 2 (1.40%) IBM
7 2 (1.40%) Marketo
7 2 (1.40%) Tableau
7 2 (1.40%) TIBCO
7 2 (1.40%) TSYS
7 2 (1.40%) Workday
City, London
IntaPeople
Rate: £350 - £400 per day
Posted: Yesterday
City, London
Salt
Rate: £400.00 - £500.00 per day
Posted: 3 days ago
City, London
Haybrook IT Resourcing Ltd
Rate: Up to £500 per day
Posted: Yesterday
City, London
Understanding Recruitment
Rate: £400 - £500 per day
Posted: 3 days ago
City, London
I3
Rate: £525 - £550 per day
Posted: 4 days ago