Period
to 30 March 2020

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 6 months to 30 March 2020 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
Central London > City of London
6 months to
30 Mar 2020
Same period 2019 Same period 2018
Rank 127 97 108
Rank change year-on-year -30 +11 -10
Contract jobs citing JSON 54 169 164
As % of all contract jobs advertised in the City of London 1.26% 2.48% 2.29%
As % of the Libraries, Frameworks & Software Standards category 3.66% 6.57% 6.06%
Number of daily rates quoted 37 131 131
Median daily rate £495 £525 £475
Median daily rate % change year-on-year -5.71% +10.53% -
10th Percentile £345 £400 £406
90th Percentile £650 £644 £619
Central London median daily rate £505 £525 £475
% change year-on-year -3.81% +10.53% -
Number of hourly rates quoted 1 0 0
Median hourly rate £63.33 - -
Central London median hourly rate £63.33 - -

JSON is in the Software Libraries and Frameworks category. The following 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 technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
City of London
Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 1,474 2,574 2,707
As % of all contract IT jobs advertised in the City of London 34.43% 37.81% 37.80%
Number of daily rates quoted 1,167 2,083 2,289
Median daily rate £525 £525 £520
Median daily rate % change year-on-year - +0.96% +8.33%
10th Percentile £387 £407 £363
90th Percentile £675 £675 £675
Central London median daily rate £525 £525 £500
% change year-on-year - +5.00% +5.26%
Number of hourly rates quoted 9 7 13
Median hourly rate £35.00 £35.00 £21.50
Median hourly rate % change year-on-year - +62.79% -30.42%
10th Percentile £24.50 £16.70 £21.25
90th Percentile £62.00 £92.20 £63.65
Median hourly rate £35.00 £35.00 £21.50
% change year-on-year - +62.79% -30.42%

JSON
Job Vacancy Trend in the City of London

Job postings citing JSON as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for JSON in the City of London

JSON
Contractor Daily Rate Trend in the City of London

3-month moving average daily rate quoted in jobs citing JSON in the City of London.

Daily rate trend for JSON in the City of London

JSON
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing JSON in the City of London over the 6 months to 30 March 2020.

Daily rate histogram for JSON in the City of London

JSON
Contractor Hourly Rate Trend in the City of London

3-month moving average hourly rates quoted in jobs citing JSON in the City of London.

Hourly rate trend for JSON in the City of London

For the 6 months to 30 March 2020, IT contractor jobs citing JSON also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the City of London region with a requirement for JSON.

1 33 (61.11%) XML
2 27 (50.00%) Agile Software Development
3 22 (40.74%) Java
3 22 (40.74%) JavaScript
4 20 (37.04%) Web Services
5 19 (35.19%) CSS
6 18 (33.33%) REST
7 17 (31.48%) HTML
8 16 (29.63%) C#
9 15 (27.78%) SQL
9 15 (27.78%) Git (software)
10 13 (24.07%) Jenkins
10 13 (24.07%) .NET
11 12 (22.22%) DevOps
12 11 (20.37%) Azure
12 11 (20.37%) SOAP
12 11 (20.37%) SDLC
13 10 (18.52%) Multithreading
14 9 (16.67%) Web Development
14 9 (16.67%) GitHub
14 9 (16.67%) Waterfall
14 9 (16.67%) WebLogic
14 9 (16.67%) Linux
14 9 (16.67%) SQL Server
14 9 (16.67%) Maven
14 9 (16.67%) API Development
15 8 (14.81%) Front End Development
15 8 (14.81%) MVC
15 8 (14.81%) Finance
15 8 (14.81%) HTML5

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 (16.67%) WebLogic
2 6 (11.11%) WebSphere
3 5 (9.26%) Confluence
4 4 (7.41%) Apache
5 3 (5.56%) Apache Spark
5 3 (5.56%) CMS
5 3 (5.56%) Oracle SOA Suite
6 2 (3.70%) Drupal
6 2 (3.70%) IIS
6 2 (3.70%) MQSeries
6 2 (3.70%) Tomcat
7 1 (1.85%) JBoss
7 1 (1.85%) Red Hat Fuse
7 1 (1.85%) SharePoint
Business Applications
1 1 (1.85%) Sparx Enterprise Architect
Cloud Services
1 11 (20.37%) Azure
2 9 (16.67%) GitHub
3 7 (12.96%) AWS
4 3 (5.56%) Serverless
5 2 (3.70%) AWS CloudFormation
5 2 (3.70%) AWS Lambda
5 2 (3.70%) Azure Functions
5 2 (3.70%) npm
5 2 (3.70%) OpenShift
5 2 (3.70%) Power Platform
5 2 (3.70%) SaaS
6 1 (1.85%) Amazon Cognito
6 1 (1.85%) Boomi
6 1 (1.85%) GCP
6 1 (1.85%) Google App Engine
6 1 (1.85%) Office 365
Communications & Networking
1 7 (12.96%) HTTP
2 2 (3.70%) DNS
2 2 (3.70%) OpenVPN
3 1 (1.85%) Broadband
3 1 (1.85%) SSL
Database & Business Intelligence
1 9 (16.67%) SQL Server
2 7 (12.96%) NoSQL
3 6 (11.11%) Big Data
4 2 (3.70%) Parquet
4 2 (3.70%) PostgreSQL
4 2 (3.70%) Power BI
4 2 (3.70%) RDBMS
4 2 (3.70%) Relational Database
4 2 (3.70%) Sqoop
5 1 (1.85%) Data Warehouse
5 1 (1.85%) HBase
5 1 (1.85%) MongoDB
5 1 (1.85%) MySQL
5 1 (1.85%) Oracle Database
5 1 (1.85%) Oracle Database 11g
5 1 (1.85%) SQL Server 2008
5 1 (1.85%) SQL Server 2014
5 1 (1.85%) SQL Server Integration Services
5 1 (1.85%) SQL Server Reporting Services
Development Applications
1 15 (27.78%) Git (software)
2 13 (24.07%) Jenkins
3 9 (16.67%) Maven
4 7 (12.96%) JIRA
4 7 (12.96%) JMeter
4 7 (12.96%) JUnit
4 7 (12.96%) Mockito
5 6 (11.11%) Ant
5 6 (11.11%) git-flow
5 6 (11.11%) Gradle
6 5 (9.26%) Postman
7 4 (7.41%) Visual Studio
8 3 (5.56%) Cucumber
8 3 (5.56%) gulp
8 3 (5.56%) Selenium
8 3 (5.56%) SpecFlow
9 2 (3.70%) Babel
9 2 (3.70%) SoapUI
9 2 (3.70%) webpack
10 1 (1.85%) Bitbucket
General
1 8 (14.81%) Finance
2 3 (5.56%) Banking
3 1 (1.85%) Advertising
3 1 (1.85%) Automotive
3 1 (1.85%) Investment Banking
3 1 (1.85%) Law
3 1 (1.85%) Marketing
3 1 (1.85%) Pharmaceutical
3 1 (1.85%) Retail
Job Titles
1 29 (53.70%) Developer
2 8 (14.81%) Architect
3 6 (11.11%) Java Developer
4 5 (9.26%) UI Developer
5 4 (7.41%) Analyst
5 4 (7.41%) Full Stack Developer
5 4 (7.41%) Python Developer
5 4 (7.41%) Solutions Architect
6 3 (5.56%) Business Analyst
6 3 (5.56%) C# Developer
6 3 (5.56%) Front End Developer (Client-Side Developer)
6 3 (5.56%) Technical Analyst
6 3 (5.56%) Technical Architect
6 3 (5.56%) Technical Business Analyst
7 2 (3.70%) Big Data Engineer
7 2 (3.70%) Data Engineer
7 2 (3.70%) Node.js Developer
7 2 (3.70%) QA Automation Tester
7 2 (3.70%) React Developer
7 2 (3.70%) Web Business Analyst
Libraries, Frameworks & Software Standards
1 33 (61.11%) XML
2 20 (37.04%) Web Services
3 19 (35.19%) CSS
4 18 (33.33%) REST
5 17 (31.48%) HTML
6 13 (24.07%) .NET
7 11 (20.37%) SOAP
8 8 (14.81%) HTML5
8 8 (14.81%) RESTful
8 8 (14.81%) Spring
9 7 (12.96%) Sass
10 6 (11.11%) J2EE
10 6 (11.11%) RxJava
11 5 (9.26%) ASP.NET Web API
11 5 (9.26%) Node.js
12 4 (7.41%) .NET Framework
12 4 (7.41%) Java EE
12 4 (7.41%) jQuery
12 4 (7.41%) React
13 3 (5.56%) YAML
Miscellaneous
1 6 (11.11%) Analytical Skills
1 6 (11.11%) Enterprise Software
1 6 (11.11%) Mobile App
1 6 (11.11%) Mobile Payment
2 5 (9.26%) Data Structures
2 5 (9.26%) User Experience
3 3 (5.56%) Life Science
3 3 (5.56%) Management Information System
4 2 (3.70%) Cloud Native
4 2 (3.70%) Greenfield Project
4 2 (3.70%) Public Cloud
4 2 (3.70%) Semantic Web
4 2 (3.70%) Web 2.0
5 1 (1.85%) Animation
5 1 (1.85%) Credit Risk
5 1 (1.85%) Market Risk
5 1 (1.85%) Reinsurance
5 1 (1.85%) Self-Motivation
Operating Systems
1 9 (16.67%) Linux
2 3 (5.56%) Windows
3 2 (3.70%) Windows Server
4 1 (1.85%) Apple iOS
4 1 (1.85%) Red Hat Enterprise Linux
4 1 (1.85%) Unix
Processes & Methodologies
1 27 (50.00%) Agile Software Development
2 12 (22.22%) DevOps
3 11 (20.37%) SDLC
4 10 (18.52%) Multithreading
5 9 (16.67%) API Development
5 9 (16.67%) Waterfall
5 9 (16.67%) Web Development
6 8 (14.81%) BDD
6 8 (14.81%) Front End Development
6 8 (14.81%) MVC
6 8 (14.81%) Open Source
7 7 (12.96%) Computer Science
7 7 (12.96%) Continuous Integration
7 7 (12.96%) Microservices
7 7 (12.96%) SOA
8 6 (11.11%) Multithreaded Programming
8 6 (11.11%) TDD
8 6 (11.11%) Thought Leadership
9 4 (7.41%) Asset Management
9 4 (7.41%) Kanban
Programming Languages
1 22 (40.74%) Java
1 22 (40.74%) JavaScript
2 16 (29.63%) C#
3 15 (27.78%) SQL
4 7 (12.96%) Kotlin
4 7 (12.96%) Python
5 6 (11.11%) T-SQL
6 5 (9.26%) Shell Script
7 4 (7.41%) Bash Shell
7 4 (7.41%) Groovy
7 4 (7.41%) PL/SQL
8 3 (5.56%) Java 8
8 3 (5.56%) PHP
8 3 (5.56%) PowerShell
8 3 (5.56%) Ruby
8 3 (5.56%) Scala
9 2 (3.70%) Go
9 2 (3.70%) Perl
10 1 (1.85%) Apple Swift
10 1 (1.85%) Clojure
Qualifications
1 7 (12.96%) Degree
1 7 (12.96%) SC Cleared
1 7 (12.96%) Security Cleared
2 5 (9.26%) Computer Science Degree
3 2 (3.70%) CTC Cleared
3 2 (3.70%) DV Cleared
3 2 (3.70%) ISEB
4 1 (1.85%) CCIE
4 1 (1.85%) CCNA
4 1 (1.85%) Cisco Certification
Quality Assurance & Compliance
1 3 (5.56%) QA
2 1 (1.85%) GxP
System Software
1 5 (9.26%) Docker
Systems Management
1 2 (3.70%) Hadoop YARN
1 2 (3.70%) Kubernetes
1 2 (3.70%) Oozie
1 2 (3.70%) Terraform
2 1 (1.85%) Ansible
2 1 (1.85%) Puppet
Vendors
1 5 (9.26%) Oracle
2 4 (7.41%) Microsoft
3 2 (3.70%) Atlassian
3 2 (3.70%) Google
3 2 (3.70%) MuleSoft
3 2 (3.70%) Red Hat
3 2 (3.70%) TOWER Software
4 1 (1.85%) Axway
4 1 (1.85%) Bloomberg
4 1 (1.85%) Dell
4 1 (1.85%) HubSpot
4 1 (1.85%) Informatica
4 1 (1.85%) MapR
4 1 (1.85%) Reuters
4 1 (1.85%) Sitecore
4 1 (1.85%) Sparx
4 1 (1.85%) Sybase
4 1 (1.85%) Workday