Period
to

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 12 August 2022 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
12 Aug 2022
Same period 2021 Same period 2020
Rank 149 127 116
Rank change year-on-year -22 -11 -13
Contract jobs citing JSON 51 44 15
As % of all contract jobs advertised in the City of London 1.13% 1.27% 0.69%
As % of the Libraries, Frameworks & Software Standards category 3.72% 3.78% 2.12%
Number of daily rates quoted 35 23 9
10th Percentile £418 £356 £356
25th Percentile £479 £413 £425
Median daily rate (50th Percentile) £550 £525 £475
Median % change year-on-year +4.76% +10.53% -9.52%
75th Percentile £728 £605 £575
90th Percentile £800 £710 £578
Central London median daily rate £555 £517 £500
% change year-on-year +7.40% +3.35% -4.76%

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 1,372 1,164 709
As % of all contract IT jobs advertised in the City of London 30.30% 33.56% 32.73%
Number of daily rates quoted 995 883 550
10th Percentile £425 £411 £375
25th Percentile £500 £475 £450
Median daily rate (50th Percentile) £600 £600 £525
Median % change year-on-year - +14.29% -
75th Percentile £719 £656 £613
90th Percentile £800 £738 £688
Central London median daily rate £600 £585 £525
% change year-on-year +2.56% +11.43% -
Number of hourly rates quoted 5 9 6
10th Percentile £43.25 £16.00 £28.13
25th Percentile £46.25 £21.25 £33.75
Median hourly rate £72.50 £35.00 £38.25
Median % change year-on-year +107.14% -8.50% -8.37%
75th Percentile £78.75 £37.75 £45.81
90th Percentile - £68.20 £52.63
Central London median hourly rate £72.50 £35.00 £38.25
% change year-on-year +107.14% -8.50% -11.37%

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 12 August 2022.

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 12 August 2022, 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 32 (62.75%) JavaScript
1 32 (62.75%) REST
2 30 (58.82%) XML
3 27 (52.94%) Agile
4 26 (50.98%) Finance
5 25 (49.02%) HTML
6 21 (41.18%) Java
7 19 (37.25%) SQL
7 19 (37.25%) CSS
8 17 (33.33%) Spring
8 17 (33.33%) DevOps
8 17 (33.33%) CI/CD
9 15 (29.41%) Banking
9 15 (29.41%) Test Automation
9 15 (29.41%) Azure
10 14 (27.45%) RESTful
11 13 (25.49%) Unit Testing
11 13 (25.49%) Oracle
11 13 (25.49%) Microservices
11 13 (25.49%) React
11 13 (25.49%) Jenkins
12 12 (23.53%) AngularJS
12 12 (23.53%) TypeScript
12 12 (23.53%) Web Services
12 12 (23.53%) Git (software)
12 12 (23.53%) HTML5
13 11 (21.57%) AWS
13 11 (21.57%) Data Protection
13 11 (21.57%) Maven
13 11 (21.57%) SOAP

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 5 (9.80%) Apache Solr
1 5 (9.80%) IIS
2 4 (7.84%) Tomcat
3 3 (5.88%) Alfresco
3 3 (5.88%) CMS
3 3 (5.88%) Confluence
4 2 (3.92%) Apache
4 2 (3.92%) JBoss
5 1 (1.96%) Apache Airflow
5 1 (1.96%) Apache Spark
5 1 (1.96%) BizTalk Server
5 1 (1.96%) Cloud Foundry
5 1 (1.96%) FileNet
5 1 (1.96%) Joomla!
5 1 (1.96%) Mule
5 1 (1.96%) Umbraco
Business Applications
1 2 (3.92%) Salesforce.com CRM
1 2 (3.92%) WebTrends
2 1 (1.96%) BondVision
2 1 (1.96%) BusinessWorks
2 1 (1.96%) Oracle ERP
2 1 (1.96%) Shopify
Cloud Services
1 15 (29.41%) Azure
2 11 (21.57%) AWS
3 6 (11.76%) Azure DevOps
4 4 (7.84%) Azure Active Directory
5 3 (5.88%) npm
5 3 (5.88%) PaaS
6 2 (3.92%) AWS CloudFormation
6 2 (3.92%) Azure Storage
6 2 (3.92%) Force.com
6 2 (3.92%) GitHub
6 2 (3.92%) Google Analytics
6 2 (3.92%) SaaS
7 1 (1.96%) Azure ExpressRoute
7 1 (1.96%) GCP
7 1 (1.96%) Power Platform
7 1 (1.96%) Slack
Communications & Networking
1 4 (7.84%) HTTP
2 2 (3.92%) DNS
2 2 (3.92%) Internet
2 2 (3.92%) Intranet
2 2 (3.92%) Network Security
2 2 (3.92%) SSL
3 1 (1.96%) Firewall
3 1 (1.96%) VPN
Database & Business Intelligence
1 10 (19.61%) SQL Server
2 8 (15.69%) Relational Database
3 6 (11.76%) MongoDB
4 5 (9.80%) Elasticsearch
4 5 (9.80%) PostgreSQL
5 4 (7.84%) MySQL
6 3 (5.88%) DynamoDB
6 3 (5.88%) GIS
6 3 (5.88%) Oracle Database
7 2 (3.92%) Big Data
7 2 (3.92%) DocumentDB
7 2 (3.92%) Hadoop
8 1 (1.96%) Apache Hive
8 1 (1.96%) Azure SQL Database
8 1 (1.96%) DB2
8 1 (1.96%) KDB
8 1 (1.96%) NoSQL
8 1 (1.96%) RDBMS
8 1 (1.96%) Spark SQL
8 1 (1.96%) Sqoop
Development Applications
1 13 (25.49%) Jenkins
2 12 (23.53%) Git (software)
3 11 (21.57%) Maven
4 6 (11.76%) SoapUI
5 5 (9.80%) Eclipse
5 5 (9.80%) JMeter
5 5 (9.80%) Mercurial
5 5 (9.80%) NeoLoad
5 5 (9.80%) Selenium
6 4 (7.84%) Visual Studio
7 3 (5.88%) Cypress.io
7 3 (5.88%) JIRA
7 3 (5.88%) JUnit
7 3 (5.88%) Postman
7 3 (5.88%) Qt Creator
8 2 (3.92%) Babel
8 2 (3.92%) ESLint
8 2 (3.92%) Gradle
8 2 (3.92%) Mockito
8 2 (3.92%) Storybook
General
1 26 (50.98%) Finance
2 15 (29.41%) Banking
3 10 (19.61%) Financial Institution
4 9 (17.65%) Legal
4 9 (17.65%) Social Skills
5 6 (11.76%) Documentation Skills
6 3 (5.88%) Front Office
6 3 (5.88%) Presentation Skills
6 3 (5.88%) Retail
7 2 (3.92%) Advertising
7 2 (3.92%) Telecoms
8 1 (1.96%) Analytical Skills
8 1 (1.96%) Back Office
8 1 (1.96%) Billing
8 1 (1.96%) Retail Banking
Job Titles
1 30 (58.82%) Developer
2 9 (17.65%) React Developer
3 6 (11.76%) Java Developer
4 5 (9.80%) Architect
5 4 (7.84%) Full Stack Developer
5 4 (7.84%) Senior Developer
6 3 (5.88%) Applications Developer
6 3 (5.88%) Front End Developer (Client-Side Developer)
6 3 (5.88%) Mobile Applications Developer
6 3 (5.88%) Mobile Developer
6 3 (5.88%) Senior Java Developer
7 2 (3.92%) Consultant
7 2 (3.92%) Front Office Developer
7 2 (3.92%) Integration Architect
7 2 (3.92%) Salesforce Developer
7 2 (3.92%) Security Engineer
7 2 (3.92%) Senior Full Stack Developer
7 2 (3.92%) Software Developer
7 2 (3.92%) Solutions Architect
7 2 (3.92%) Web Developer
Libraries, Frameworks & Software Standards
1 32 (62.75%) REST
2 30 (58.82%) XML
3 25 (49.02%) HTML
4 19 (37.25%) CSS
5 17 (33.33%) Spring
6 14 (27.45%) RESTful
7 13 (25.49%) React
8 12 (23.53%) AngularJS
8 12 (23.53%) HTML5
8 12 (23.53%) Web Services
9 11 (21.57%) SOAP
10 10 (19.61%) CSS3
11 9 (17.65%) Ajax
11 9 (17.65%) Spring Boot
12 8 (15.69%) Hibernate
13 7 (13.73%) JMS
13 7 (13.73%) Node.js
14 6 (11.76%) .NET
14 6 (11.76%) DOM
14 6 (11.76%) Sass
Miscellaneous
1 10 (19.61%) User Experience
2 9 (17.65%) Hedge funds
3 8 (15.69%) Enterprise Software
4 4 (7.84%) Public Cloud
5 3 (5.88%) Mobile App
6 2 (3.92%) Greenfield Project
6 2 (3.92%) Hybrid Cloud
6 2 (3.92%) Linux Command Line
6 2 (3.92%) Self-Motivation
7 1 (1.96%) Blockchain
7 1 (1.96%) Data Structures
7 1 (1.96%) Fixed Income
7 1 (1.96%) Low-Code
7 1 (1.96%) SWIFT
Operating Systems
1 10 (19.61%) Linux
2 9 (17.65%) Windows
3 4 (7.84%) Unix
4 3 (5.88%) Android
4 3 (5.88%) Apple iOS
Processes & Methodologies
1 27 (52.94%) Agile
2 17 (33.33%) CI/CD
2 17 (33.33%) DevOps
3 15 (29.41%) Test Automation
4 13 (25.49%) Microservices
4 13 (25.49%) Unit Testing
5 11 (21.57%) Data Protection
6 10 (19.61%) TDD
7 9 (17.65%) AOP
7 9 (17.65%) Continuous Integration
7 9 (17.65%) Scrum
7 9 (17.65%) UX Design
8 8 (15.69%) SDLC
9 7 (13.73%) Continuous Deployment
9 7 (13.73%) UML
10 6 (11.76%) Data Visualisation
10 6 (11.76%) Process Management
10 6 (11.76%) Visualisation
11 5 (9.80%) BDD
11 5 (9.80%) Front End Development
Programming Languages
1 32 (62.75%) JavaScript
2 21 (41.18%) Java
3 19 (37.25%) SQL
4 12 (23.53%) TypeScript
5 8 (15.69%) Python
6 7 (13.73%) C#
7 6 (11.76%) PL/SQL
8 5 (9.80%) PowerShell
9 4 (7.84%) ES6
10 2 (3.92%) Apex Code
10 2 (3.92%) Bash
10 2 (3.92%) C
10 2 (3.92%) C++
10 2 (3.92%) Formula Language
10 2 (3.92%) SOQL
10 2 (3.92%) SOSL
11 1 (1.96%) Perl
11 1 (1.96%) Scala
11 1 (1.96%) T-SQL
11 1 (1.96%) VB.NET
Qualifications
1 2 (3.92%) SC Cleared
1 2 (3.92%) Security Cleared
2 1 (1.96%) Degree
Quality Assurance & Compliance
1 9 (17.65%) GDPR
2 8 (15.69%) QA
3 5 (9.80%) Accessibility
4 2 (3.92%) WCAG
System Software
1 8 (15.69%) Docker
2 5 (9.80%) Active Directory
3 2 (3.92%) Virtual Machines
4 1 (1.96%) VMware Infrastructure
4 1 (1.96%) VMware NSX
4 1 (1.96%) vSphere
Systems Management
1 7 (13.73%) Kubernetes
2 5 (9.80%) Kibana
2 5 (9.80%) logstash
3 3 (5.88%) Microsoft Intune
3 3 (5.88%) Puppet
3 3 (5.88%) Terraform
4 1 (1.96%) Ansible
4 1 (1.96%) CA Service Virtualization
4 1 (1.96%) Opscode Chef
4 1 (1.96%) PowerCLI
4 1 (1.96%) TIBCO Hawk
4 1 (1.96%) vRealize
4 1 (1.96%) vRealize Orchestrator
4 1 (1.96%) WMI
Vendors
1 13 (25.49%) Oracle
2 8 (15.69%) Microsoft
3 6 (11.76%) Google
4 4 (7.84%) MuleSoft
5 2 (3.92%) Atlassian
5 2 (3.92%) FatWire
5 2 (3.92%) IBM
5 2 (3.92%) Salesforce.com
5 2 (3.92%) TIBCO
6 1 (1.96%) Axway
6 1 (1.96%) Bloomberg
6 1 (1.96%) Blue Coat
6 1 (1.96%) CA
6 1 (1.96%) Cadence
6 1 (1.96%) MicroStrategy
6 1 (1.96%) Software AG
6 1 (1.96%) Sybase
6 1 (1.96%) Temenos
6 1 (1.96%) VMware
6 1 (1.96%) webMethods