Period
to 13 April 2021

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 13 April 2021 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
13 Apr 2021
Same period 2020 Same period 2019
Rank 101 127 100
Rank change year-on-year +26 -27 +9
Contract jobs citing JSON 38 49 170
As % of all contract jobs advertised in the City of London 1.57% 1.21% 2.50%
As % of the Libraries, Frameworks & Software Standards category 4.73% 3.47% 6.63%
Number of daily rates quoted 32 31 131
10th Percentile £278 £336 £413
25th Percentile £418 £364 £438
Median daily rate (50th Percentile) £513 £450 £525
Median % change year-on-year +13.89% -14.29% +10.53%
75th Percentile £614 £553 £575
90th Percentile £716 £650 £638
Central London median daily rate £500 £500 £525
% change year-on-year - -4.76% +10.53%
Number of hourly rates quoted 0 1 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 804 1,412 2,563
As % of all contract IT jobs advertised in the City of London 33.25% 34.79% 37.72%
Number of daily rates quoted 608 1,133 2,075
10th Percentile £392 £385 £408
25th Percentile £450 £450 £463
Median daily rate (50th Percentile) £550 £525 £525
Median % change year-on-year +4.76% - -
75th Percentile £638 £618 £600
90th Percentile £700 £688 £675
Central London median daily rate £550 £525 £525
% change year-on-year +4.76% - +3.96%
Number of hourly rates quoted 3 6 8
10th Percentile £15.25 £24.50 £12.88
25th Percentile £15.63 £29.69 £17.38
Median hourly rate £17.50 £50.75 £28.75
Median % change year-on-year -65.52% +76.52% +33.72%
75th Percentile £20.63 £60.31 £42.25
90th Percentile £21.75 £63.12 £56.50
Central London median hourly rate £18.75 £55.00 £35.00
% change year-on-year -65.91% +57.14% +62.79%

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 13 April 2021.

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 13 April 2021, 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 24 (63.16%) Java
2 22 (57.89%) XML
3 13 (34.21%) Agile Software Development
4 12 (31.58%) SQL
4 12 (31.58%) RESTful
4 12 (31.58%) AWS
5 10 (26.32%) Azure
6 9 (23.68%) JavaScript
6 9 (23.68%) Web Services
7 8 (21.05%) Microservices
8 7 (18.42%) REST
8 7 (18.42%) Node.js
8 7 (18.42%) Android
8 7 (18.42%) Git (software)
8 7 (18.42%) .NET
8 7 (18.42%) SOA
8 7 (18.42%) Spring
8 7 (18.42%) Front End Development
9 6 (15.79%) Kotlin
9 6 (15.79%) SQL Server
9 6 (15.79%) HTML
9 6 (15.79%) Python
9 6 (15.79%) Test Automation
10 5 (13.16%) SC Cleared
10 5 (13.16%) Security Cleared
10 5 (13.16%) User Experience
10 5 (13.16%) Spring Boot
10 5 (13.16%) Jenkins
10 5 (13.16%) Docker
10 5 (13.16%) CSS

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 2 (5.26%) Apache
1 2 (5.26%) Apache Spark
1 2 (5.26%) SharePoint
2 1 (2.63%) Anypoint
2 1 (2.63%) Camunda
2 1 (2.63%) CMS
2 1 (2.63%) Confluence
2 1 (2.63%) Elasticsearch
2 1 (2.63%) nginx
Cloud Services
1 12 (31.58%) AWS
2 10 (26.32%) Azure
3 5 (13.16%) Serverless
4 4 (10.53%) GitHub
4 4 (10.53%) Power Platform
4 4 (10.53%) PowerApps
5 3 (7.89%) Amazon S3
5 3 (7.89%) Azure Functions
5 3 (7.89%) GCP
5 3 (7.89%) Logic Apps
5 3 (7.89%) Power Automate
6 2 (5.26%) Amazon SQS
6 2 (5.26%) AWS Lambda
6 2 (5.26%) IaaS
6 2 (5.26%) Virtual Private Cloud
7 1 (2.63%) Azure Data Factory
7 1 (2.63%) Microsoft 365
7 1 (2.63%) PaaS
7 1 (2.63%) SaaS
7 1 (2.63%) Slack
Communications & Networking
1 4 (10.53%) HTTP
2 2 (5.26%) Firewall
2 2 (5.26%) HTTPS
2 2 (5.26%) Wi-Fi
3 1 (2.63%) BGP
3 1 (2.63%) Cisco ASA
3 1 (2.63%) Cisco Nexus
3 1 (2.63%) Cisco Wireless
3 1 (2.63%) Extranet
3 1 (2.63%) F5 BIG-IP GTM
3 1 (2.63%) F5 BIG-IP LTM
3 1 (2.63%) Intranet
3 1 (2.63%) LAN
3 1 (2.63%) Multicast
3 1 (2.63%) Network Security
3 1 (2.63%) OSPF
3 1 (2.63%) VXLAN
3 1 (2.63%) WAN
3 1 (2.63%) Wireless
3 1 (2.63%) Wireshark
Database & Business Intelligence
1 6 (15.79%) SQL Server
2 5 (13.16%) PostgreSQL
3 3 (7.89%) Amazon Redshift
3 3 (7.89%) Azure SQL Database
3 3 (7.89%) Data Warehouse
3 3 (7.89%) MySQL
3 3 (7.89%) OLTP
4 2 (5.26%) Data Lake
4 2 (5.26%) Hadoop
4 2 (5.26%) NoSQL
5 1 (2.63%) Amazon DynamoDB
5 1 (2.63%) Amazon RDS
5 1 (2.63%) Apache Cassandra
5 1 (2.63%) BusinessObjects
5 1 (2.63%) Data Mart
5 1 (2.63%) Redis
5 1 (2.63%) Relational Database
5 1 (2.63%) Snowflake Schema
5 1 (2.63%) Tableau
5 1 (2.63%) Yellowfin
Development Applications
1 7 (18.42%) Git (software)
2 5 (13.16%) Jenkins
3 4 (10.53%) JUnit
3 4 (10.53%) Maven
4 3 (7.89%) Android Studio
4 3 (7.89%) Appium
4 3 (7.89%) Gradle
4 3 (7.89%) JIRA
4 3 (7.89%) Visual Studio Team System
4 3 (7.89%) Xcode
5 2 (5.26%) Cucumber
5 2 (5.26%) Mockito
5 2 (5.26%) REST Assured
5 2 (5.26%) Sonatype Nexus
5 2 (5.26%) Subversion
5 2 (5.26%) webpack
6 1 (2.63%) Eclipse
6 1 (2.63%) Postman
6 1 (2.63%) Storybook
6 1 (2.63%) Visual Studio
General
1 4 (10.53%) Banking
2 3 (7.89%) Finance
3 2 (5.26%) Public Sector
4 1 (2.63%) Investment Banking
4 1 (2.63%) Manufacturing
4 1 (2.63%) Retail Banking
4 1 (2.63%) Telecoms
Job Titles
1 20 (52.63%) Developer
2 6 (15.79%) Java Developer
3 4 (10.53%) Analyst
3 4 (10.53%) Android Developer
4 3 (7.89%) Azure DevOps Engineer
4 3 (7.89%) Azure Engineer
4 3 (7.89%) DevOps Engineer
4 3 (7.89%) Front End Developer (Client-Side Developer)
4 3 (7.89%) Software Engineer
4 3 (7.89%) Software Test Engineer
4 3 (7.89%) Test Engineer
5 2 (5.26%) Automation Tester
5 2 (5.26%) AWS Developer
5 2 (5.26%) Data Analyst
5 2 (5.26%) Data Engineer
5 2 (5.26%) ETL Developer
5 2 (5.26%) Integration Analyst
5 2 (5.26%) Java Android Developer
5 2 (5.26%) Solutions Architect
5 2 (5.26%) Technical Analyst
Libraries, Frameworks & Software Standards
1 22 (57.89%) XML
2 12 (31.58%) RESTful
3 9 (23.68%) Web Services
4 7 (18.42%) .NET
4 7 (18.42%) Node.js
4 7 (18.42%) REST
4 7 (18.42%) Spring
5 6 (15.79%) HTML
6 5 (13.16%) CSS
6 5 (13.16%) Spring Boot
7 3 (7.89%) AngularJS
7 3 (7.89%) React
7 3 (7.89%) SOAP
8 2 (5.26%) J2EE
8 2 (5.26%) JSON Schema
8 2 (5.26%) Middleware
8 2 (5.26%) RAML
8 2 (5.26%) Redux
8 2 (5.26%) Sass
8 2 (5.26%) XSD
Miscellaneous
1 5 (13.16%) User Experience
2 3 (7.89%) Analytical Skills
3 2 (5.26%) Mobile App
4 1 (2.63%) Animation
4 1 (2.63%) Data Centre
4 1 (2.63%) Enterprise Software
4 1 (2.63%) Foreign Exchange (FX)
4 1 (2.63%) Linux Command Line
4 1 (2.63%) Private Cloud
4 1 (2.63%) Virtual Team
Operating Systems
1 7 (18.42%) Android
2 4 (10.53%) Linux
3 2 (5.26%) Apple iOS
3 2 (5.26%) Mac OS
3 2 (5.26%) Unix
Processes & Methodologies
1 13 (34.21%) Agile Software Development
2 8 (21.05%) Microservices
3 7 (18.42%) Front End Development
3 7 (18.42%) SOA
4 6 (15.79%) Test Automation
5 4 (10.53%) Android Development
5 4 (10.53%) Business Intelligence
5 4 (10.53%) Continuous Delivery
5 4 (10.53%) Data Science
5 4 (10.53%) Data Transformation
5 4 (10.53%) DevOps
5 4 (10.53%) Scrum
5 4 (10.53%) TDD
6 3 (7.89%) Continuous Integration
6 3 (7.89%) Data Ingestion
6 3 (7.89%) Data Modelling
6 3 (7.89%) Deployment Automation
6 3 (7.89%) Software Engineering
6 3 (7.89%) Software Testing
6 3 (7.89%) Use Case
Programming Languages
1 24 (63.16%) Java
2 12 (31.58%) SQL
3 9 (23.68%) JavaScript
4 6 (15.79%) Kotlin
4 6 (15.79%) Python
5 5 (13.16%) C#
6 4 (10.53%) Apple Swift
6 4 (10.53%) T-SQL
7 3 (7.89%) PowerShell
8 2 (5.26%) C++
8 2 (5.26%) ES6
8 2 (5.26%) Java 8
9 1 (2.63%) Ada
9 1 (2.63%) C
9 1 (2.63%) Objective-C
9 1 (2.63%) PL/SQL
9 1 (2.63%) Ruby
9 1 (2.63%) TypeScript
Qualifications
1 5 (13.16%) SC Cleared
1 5 (13.16%) Security Cleared
2 3 (7.89%) AWS Certification
3 2 (5.26%) Degree
4 1 (2.63%) Computer Science Degree
Quality Assurance & Compliance
1 1 (2.63%) QA
System Software
1 5 (13.16%) Docker
Systems Management
1 4 (10.53%) Kubernetes
2 3 (7.89%) Terraform
3 2 (5.26%) Ansible
4 1 (2.63%) Grafana
4 1 (2.63%) Prometheus
Vendors
1 5 (13.16%) Microsoft
1 5 (13.16%) Oracle
2 2 (5.26%) Talend
3 1 (2.63%) Adobe
3 1 (2.63%) Arista
3 1 (2.63%) CheckPoint
3 1 (2.63%) Cisco
3 1 (2.63%) Dell
3 1 (2.63%) Dynatrace
3 1 (2.63%) F5
3 1 (2.63%) Fortinet
3 1 (2.63%) Google
3 1 (2.63%) Nintex
3 1 (2.63%) Palo Alto
3 1 (2.63%) Pega
3 1 (2.63%) Riverbed
3 1 (2.63%) SolarWinds
3 1 (2.63%) Splunk
3 1 (2.63%) UiPath