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 28 March 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
28 Mar 2017
Same period 2016 Same period 2015
Rank 96 97 102
Rank change year-on-year +1 +5  
Contract jobs citing JSON 67 57 92
As % of all contract IT jobs advertised in the City of London 2.19% 1.70% 1.78%
As % of the Libraries, Frameworks & Software Standards category 6.24% 5.23% 5.93%
Number of daily rates quoted 54 47 74
Median daily rate £475 £425 £400
Median daily rate % change year-on-year +11.76% +6.38%  
90% offered a daily rate of more than £342 £375 £325
10% offered a daily rate of more than £610 £585 £475
UK excluding London median daily rate £410 £375 £350
% change year-on-year +9.33% +7.14%  
Number of hourly rates quoted 1 0 0
Median hourly rate £26.80 - -
UK excluding London median hourly rate £36.50 £55.00 £37.50
% change year-on-year -33.63% +46.66%  

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 1073 1090 1552
As % of all contract IT job vacancies advertised in the City of London 35.04% 32.50% 30.01%
Number of daily rates quoted 886 917 1243
Median daily rate £475 £463 £425
Median daily rate % change year-on-year +2.70% +8.82%  
90% offered a daily rate of more than £338 £325 £315
10% offered a daily rate of more than £625 £600 £580
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 2 5 7
Median hourly rate £35.00 £55.00 £27.37
Median hourly rate % change year-on-year -36.36% +100.94%  
UK excluding London median hourly rate £40.50 £38.00 £36.00
% change year-on-year +6.57% +5.55%  

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 28 March 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 28 March 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 85 (57.05%) REST
2 75 (50.34%) Agile Software Development
3 73 (48.99%) HTML
4 72 (48.32%) CSS
5 70 (46.98%) JavaScript
6 62 (41.61%) Java
7 59 (39.60%) XML
8 52 (34.90%) TDD
9 45 (30.20%) jQuery
9 45 (30.20%) MVC
10 40 (26.85%) Web Services
11 37 (24.83%) SQL
11 37 (24.83%) Ajax
12 36 (24.16%) Jenkins
13 34 (22.82%) AngularJS
13 34 (22.82%) Finance
14 33 (22.15%) HTML5
15 32 (21.48%) Spring
16 31 (20.81%) .NET
17 30 (20.13%) SOAP
18 28 (18.79%) C#
18 28 (18.79%) CSS3
19 27 (18.12%) Microservices
19 27 (18.12%) HTTP
20 26 (17.45%) Python
20 26 (17.45%) Scrum
20 26 (17.45%) Git (software)
20 26 (17.45%) RESTful
21 25 (16.78%) BDD
22 24 (16.11%) React

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 8 (5.37%) Mule
1 8 (5.37%) Tomcat
2 7 (4.70%) Apache Solr
2 7 (4.70%) Elasticsearch
2 7 (4.70%) IIS
2 7 (4.70%) WebLogic
3 5 (3.36%) Apache Spark
4 4 (2.68%) Apache
4 4 (2.68%) Confluence
4 4 (2.68%) Oracle SOA Suite
5 3 (2.01%) Adobe Experience Manager
5 3 (2.01%) JBoss
5 3 (2.01%) WordPress
6 2 (1.34%) Anypoint
6 2 (1.34%) BizTalk Server
6 2 (1.34%) CMS
6 2 (1.34%) Drupal
7 1 (0.67%) Apache Airflow
7 1 (0.67%) Oracle Workflow
7 1 (0.67%) WebSphere
Applications
1 2 (1.34%) Adobe Illustrator
1 2 (1.34%) MS Excel
1 2 (1.34%) Photoshop
Business Applications
1 5 (3.36%) Workday HCM
Cloud Services
1 17 (11.41%) Amazon AWS
1 17 (11.41%) Microsoft Azure
2 5 (3.36%) GitHub
3 2 (1.34%) Cloud Computing
3 2 (1.34%) Google Play
3 2 (1.34%) IaaS
4 1 (0.67%) Amazon Kinesis
4 1 (0.67%) Amazon S3
4 1 (0.67%) G Suite
4 1 (0.67%) Google Cloud Platform
4 1 (0.67%) Google Compute Engine
4 1 (0.67%) Heroku
4 1 (0.67%) PaaS
4 1 (0.67%) SaaS
Communications & Networking
1 27 (18.12%) HTTP
2 9 (6.04%) DNS
2 9 (6.04%) SSL
3 6 (4.03%) MQTT
3 6 (4.03%) RTSP
4 5 (3.36%) Intranet
4 5 (3.36%) TCP/IP
5 4 (2.68%) AMQP
6 2 (1.34%) Internet
6 2 (1.34%) SMTP
7 1 (0.67%) Asterisk PBX
7 1 (0.67%) Bluetooth
7 1 (0.67%) DHCP
7 1 (0.67%) F5 BIG-IP GTM
7 1 (0.67%) F5 BIG-IP LTM
7 1 (0.67%) Firewall
7 1 (0.67%) LDAP
Database & Business Intelligence
1 15 (10.07%) SQL Server
2 13 (8.72%) MySQL
3 12 (8.05%) NoSQL
4 7 (4.70%) MongoDB
4 7 (4.70%) Relational Database
5 6 (4.03%) Hadoop
6 5 (3.36%) Big Data
7 4 (2.68%) Apache Cassandra
7 4 (2.68%) MariaDB
7 4 (2.68%) PostgreSQL
8 2 (1.34%) Apache Hive
8 2 (1.34%) DB2
8 2 (1.34%) QlikView
8 2 (1.34%) RDBMS
8 2 (1.34%) SQL Server 2012
8 2 (1.34%) SQL Server 2014
8 2 (1.34%) SQL Server 2016
8 2 (1.34%) Sqoop
9 1 (0.67%) Oracle Database
9 1 (0.67%) Parquet
Development Applications
1 36 (24.16%) Jenkins
2 26 (17.45%) Git (software)
3 22 (14.77%) Selenium
4 21 (14.09%) Maven
5 16 (10.74%) Cucumber
5 16 (10.74%) webpack
6 15 (10.07%) JIRA
7 13 (8.72%) Jasmine
7 13 (8.72%) JUnit
7 13 (8.72%) Protractor
8 11 (7.38%) Grunt
9 10 (6.71%) Hudson
9 10 (6.71%) Mockito
10 9 (6.04%) Bower
10 9 (6.04%) gulp
11 8 (5.37%) Build Forge
11 8 (5.37%) JSHint
11 8 (5.37%) Karma Test Runner
11 8 (5.37%) QUnit
11 8 (5.37%) Visual Studio
General
1 34 (22.82%) Finance
2 23 (15.44%) Banking
3 7 (4.70%) Investment Banking
4 5 (3.36%) Advertising
5 3 (2.01%) Front Office
6 2 (1.34%) Games
7 1 (0.67%) Law
7 1 (0.67%) Legal
7 1 (0.67%) Retail
7 1 (0.67%) Telecoms
Job Titles
1 112 (75.17%) Developer
2 42 (28.19%) Java Developer
3 24 (16.11%) Senior Developer
4 21 (14.09%) Front End Developer (Client-Side Developer)
5 18 (12.08%) Senior Java Developer
6 14 (9.40%) Architect
7 12 (8.05%) JavaScript Developer
8 9 (6.04%) Web Developer
9 8 (5.37%) .NET Developer
9 8 (5.37%) Android Developer
9 8 (5.37%) Angular Developer
9 8 (5.37%) C# Developer
10 7 (4.70%) Consultant
10 7 (4.70%) Full Stack Developer
10 7 (4.70%) iOS Developer
11 6 (4.03%) Analyst
11 6 (4.03%) Analyst Developer
11 6 (4.03%) Core Java Developer
11 6 (4.03%) Front End Web Developer (Client-Side Developer)
11 6 (4.03%) Solutions Architect
Libraries, Frameworks & Software Standards
1 85 (57.05%) REST
2 73 (48.99%) HTML
3 72 (48.32%) CSS
4 59 (39.60%) XML
5 45 (30.20%) jQuery
6 40 (26.85%) Web Services
7 37 (24.83%) Ajax
8 34 (22.82%) AngularJS
9 33 (22.15%) HTML5
10 32 (21.48%) Spring
11 31 (20.81%) .NET
12 30 (20.13%) SOAP
13 28 (18.79%) CSS3
14 26 (17.45%) RESTful
15 24 (16.11%) React
16 23 (15.44%) Hibernate
17 22 (14.77%) Sass
18 19 (12.75%) JSP
18 19 (12.75%) Node.js
19 18 (12.08%) Backbone.js
Miscellaneous
1 14 (9.40%) Public Cloud
2 11 (7.38%) User Experience
3 8 (5.37%) Analytical Skills
3 8 (5.37%) Enterprise Software
3 8 (5.37%) Graphic Design
4 7 (4.70%) Mobile App
5 6 (4.03%) Computer Science
5 6 (4.03%) Data Structures
5 6 (4.03%) Foreign Exchange (FX)
5 6 (4.03%) Video on Demand
6 4 (2.68%) Blackberry
6 4 (2.68%) Derivative
6 4 (2.68%) iPad
6 4 (2.68%) iPhone
7 3 (2.01%) Fintech
7 3 (2.01%) Web 2.0
8 2 (1.34%) Clustering
8 2 (1.34%) Grid Computing
8 2 (1.34%) Virtual Team
8 2 (1.34%) Wiki
Operating Systems
1 23 (15.44%) Linux
2 16 (10.74%) Android
2 16 (10.74%) Apple iOS
2 16 (10.74%) Windows
3 11 (7.38%) Unix
4 7 (4.70%) Windows Server
5 5 (3.36%) CentOS
6 4 (2.68%) Ubuntu
6 4 (2.68%) webOS
6 4 (2.68%) Windows Phone
6 4 (2.68%) Windows Phone 7
7 2 (1.34%) Red Hat Enterprise Linux
8 1 (0.67%) FreeBSD
8 1 (0.67%) Mac OS X
8 1 (0.67%) Mac OS X Server
8 1 (0.67%) Windows Server 2012
Processes & Methodologies
1 75 (50.34%) Agile Software Development
2 52 (34.90%) TDD
3 45 (30.20%) MVC
4 27 (18.12%) Microservices
5 26 (17.45%) Scrum
6 25 (16.78%) BDD
7 23 (15.44%) Unit Testing
8 20 (13.42%) Web Development
9 19 (12.75%) Front End Development
10 17 (11.41%) DevOps
10 17 (11.41%) OO
11 14 (9.40%) Continuous Integration
11 14 (9.40%) Software Engineering
12 13 (8.72%) Multithreading
13 11 (7.38%) Responsive Web Design
14 10 (6.71%) Dependency Injection
14 10 (6.71%) Inversion of Control
14 10 (6.71%) UML
14 10 (6.71%) Web Design
15 9 (6.04%) Pair Programming
Programming Languages
1 70 (46.98%) JavaScript
2 62 (41.61%) Java
3 37 (24.83%) SQL
4 28 (18.79%) C#
5 26 (17.45%) Python
6 17 (11.41%) PHP
7 15 (10.07%) C
8 13 (8.72%) Bash Shell
9 10 (6.71%) T-SQL
10 9 (6.04%) PL/SQL
11 8 (5.37%) Apple Swift
11 8 (5.37%) Shell Script
12 7 (4.70%) Objective-C
13 6 (4.03%) Ruby
13 6 (4.03%) Scala
14 5 (3.36%) PowerShell
15 3 (2.01%) VBA
15 3 (2.01%) XPath
16 2 (1.34%) Apex Code
16 2 (1.34%) C++
Qualifications
1 8 (5.37%) Degree
2 6 (4.03%) SC Cleared
2 6 (4.03%) Security Cleared
3 1 (0.67%) CFA
Quality Assurance & Compliance
1 9 (6.04%) QA
2 2 (1.34%) HL7
3 1 (0.67%) SDET
System Software
1 4 (2.68%) Docker
2 1 (0.67%) Active Directory
2 1 (0.67%) Apache Flume
2 1 (0.67%) Ceph
2 1 (0.67%) GlusterFS
2 1 (0.67%) HDFS
2 1 (0.67%) VirtualBox
2 1 (0.67%) VMware ESXi
2 1 (0.67%) VMware Infrastructure
Systems Management
1 4 (2.68%) MOM
2 3 (2.01%) Ansible
2 3 (2.01%) Puppet
3 2 (1.34%) Galera Cluster
4 1 (0.67%) Cacti
4 1 (0.67%) Control-M
4 1 (0.67%) Jamf Pro
4 1 (0.67%) Marathon
4 1 (0.67%) Mesos
4 1 (0.67%) Norton AntiVirus
4 1 (0.67%) SCCM
4 1 (0.67%) Symantec Endpoint Protection
4 1 (0.67%) ZABBIX
Vendors
1 19 (12.75%) Oracle
2 10 (6.71%) TIBCO
3 5 (3.36%) Adobe
3 5 (3.36%) Workday
4 4 (2.68%) Apple
4 4 (2.68%) Google
4 4 (2.68%) Microsoft
4 4 (2.68%) Red Hat
4 4 (2.68%) Salesforce.com
4 4 (2.68%) Telerik
4 4 (2.68%) Xamarin
5 3 (2.01%) MuleSoft
5 3 (2.01%) Sybase
5 3 (2.01%) Teradata
6 2 (1.34%) Atlassian
6 2 (1.34%) IBM
6 2 (1.34%) Informatica
6 2 (1.34%) Marketo
6 2 (1.34%) Tableau
7 1 (0.67%) F5
City, London
ANSON MCCADE
Rate: Up to £600 per day on a rolling 3 month contract
Posted: 9 hours ago
City, London
Lawrence Harvey Enterprise
Rate: £400 - £500 per day
Posted: 10 hours ago
City, London
E-synergy Solutions
Rate: £500 - £600 per annum
Posted: Yesterday
City, London
Intrinsic Recruitment Ltd
Rate: Up to £500 per day + Bonus & Benefits
Posted: Yesterday
City, London
Oscar
Rate: £300 - £375 per day
Posted: 4 days ago
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Salt
Rate: £550.00 - £750.00 per day
Posted: 5 days ago