Period
to 7 December 2019

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 7 December 2019 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
7 Dec 2019
Same period 2018 Same period 2017
Rank 112 105 94
Rank change year-on-year -7 -11 +5
Contract jobs citing JSON 109 180 194
As % of all contract IT jobs advertised in the City of London 1.93% 2.52% 2.69%
As % of the Libraries, Frameworks & Software Standards category 5.47% 6.39% 7.09%
Number of daily rates quoted 80 154 156
City of London median daily rate £513 £500 £450
Median daily rate % change year-on-year +2.50% +11.11% -6.25%
10th Percentile £324 £413 £384
90th Percentile £639 £625 £638
Central London median daily rate £500 £500 £450
% change year-on-year - +11.11% -3.74%
Number of hourly rates quoted 2 0 0
City of London median hourly rate £42.42 - -
Central London median hourly rate £42.42 - -

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 1,993 2,819 2,736
As % of all contract IT jobs advertised in the City of London 35.31% 39.53% 37.96%
Number of daily rates quoted 1,628 2,355 2,306
City of London median daily rate £538 £525 £510
Median daily rate % change year-on-year +2.38% +2.94% +7.37%
10th Percentile £400 £406 £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 3 3 10
City of London median hourly rate £52.00 £19.00 £22.99
Median hourly rate % change year-on-year +173.68% -17.36% -34.31%
10th Percentile £26.70 £14.90 £20.28
90th Percentile £63.10 £84.50 £33.75
Central London median hourly rate £43.50 £27.00 £21.50
% change year-on-year +61.11% +25.58% -38.57%

JSON
Job Vacancy Trend in the City of London

Job postings citing JSON as a percentage 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

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 6 months to 7 December 2019.

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

JSON
Contractor Hourly Rate Histogram in the City of London

The hourly rate distribution of IT jobs citing JSON in the City of London over the 6 months to 7 December 2019.

Contractor hourly rate histogram for JSON in the City of London

For the 6 months to 7 December 2019, 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 57 (52.29%) Agile Software Development
2 48 (44.04%) JavaScript
3 47 (43.12%) Java
3 47 (43.12%) XML
4 40 (36.70%) REST
5 38 (34.86%) SQL
6 34 (31.19%) Web Services
7 33 (30.28%) Git (software)
8 31 (28.44%) HTML
9 28 (25.69%) CSS
9 28 (25.69%) DevOps
10 27 (24.77%) Python
11 25 (22.94%) C#
11 25 (22.94%) Scrum
11 25 (22.94%) Azure
11 25 (22.94%) AWS
11 25 (22.94%) AngularJS
11 25 (22.94%) Jenkins
12 23 (21.10%) Linux
13 21 (19.27%) Microservices
14 20 (18.35%) Continuous Integration
15 19 (17.43%) Spring
15 19 (17.43%) SOAP
15 19 (17.43%) SDLC
16 18 (16.51%) Docker
16 18 (16.51%) SQL Server
17 17 (15.60%) Finance
17 17 (15.60%) TDD
17 17 (15.60%) Ruby
17 17 (15.60%) Bash Shell

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 (8.26%) Confluence
1 9 (8.26%) WebLogic
2 6 (5.50%) Tomcat
3 5 (4.59%) Apache
3 5 (4.59%) IIS
3 5 (4.59%) JBoss
4 4 (3.67%) Apache Spark
4 4 (3.67%) Cloud Foundry
4 4 (3.67%) WebSphere
5 3 (2.75%) CMS
5 3 (2.75%) SharePoint
6 2 (1.83%) Apache Solr
6 2 (1.83%) Elasticsearch
6 2 (1.83%) Jetty
6 2 (1.83%) Jupyter
6 2 (1.83%) Magnolia
6 2 (1.83%) Oracle Self-Service HR
6 2 (1.83%) Oracle SOA Suite
7 1 (0.92%) GeoServer
7 1 (0.92%) SilverStripe
Applications
1 2 (1.83%) Microsoft Excel
Business Applications
1 2 (1.83%) BusinessWorks
1 2 (1.83%) Dynamics CRM
2 1 (0.92%) Dynamics AX
2 1 (0.92%) Dynamics NAV
2 1 (0.92%) Sparx Enterprise Architect
2 1 (0.92%) WebTrends
Cloud Services
1 25 (22.94%) AWS
1 25 (22.94%) Azure
2 8 (7.34%) GitHub
3 7 (6.42%) Amazon EC2
3 7 (6.42%) Datadog
4 6 (5.50%) Virtual Private Cloud
5 5 (4.59%) Amazon S3
6 4 (3.67%) AWS CloudFormation
7 3 (2.75%) Amazon ELB
7 3 (2.75%) npm
7 3 (2.75%) Office 365
8 2 (1.83%) Amazon CloudWatch
8 2 (1.83%) Amazon EMR
8 2 (1.83%) Amazon Kinesis
8 2 (1.83%) AWS CloudTrail
8 2 (1.83%) AWS Fargate
8 2 (1.83%) AWS Lambda
8 2 (1.83%) AWS Step Functions
8 2 (1.83%) Power Platform
8 2 (1.83%) Serverless
Communications & Networking
1 8 (7.34%) VPN
2 7 (6.42%) Internet
3 6 (5.50%) HTTP
4 2 (1.83%) SSH
5 1 (0.92%) Intranet
Database & Business Intelligence
1 18 (16.51%) SQL Server
2 8 (7.34%) PostgreSQL
3 7 (6.42%) Amazon RDS
3 7 (6.42%) NoSQL
4 6 (5.50%) Big Data
4 6 (5.50%) Relational Database
5 5 (4.59%) Amazon DynamoDB
5 5 (4.59%) Hadoop
5 5 (4.59%) MongoDB
5 5 (4.59%) SQL Server Integration Services
6 4 (3.67%) Data Warehouse
6 4 (3.67%) MySQL
6 4 (3.67%) Oracle Database
7 3 (2.75%) Data Lake
7 3 (2.75%) Parquet
7 3 (2.75%) SQL Server 2008
8 2 (1.83%) Amazon Athena
8 2 (1.83%) Apache Zeppelin
8 2 (1.83%) OLAP
8 2 (1.83%) RDBMS
Development Applications
1 33 (30.28%) Git (software)
2 25 (22.94%) Jenkins
3 15 (13.76%) JIRA
4 13 (11.93%) Maven
5 9 (8.26%) Sonatype Nexus
6 8 (7.34%) Atlassian Bamboo
6 8 (7.34%) Gradle
7 7 (6.42%) Selenium
8 6 (5.50%) Ant
8 6 (5.50%) JUnit
9 5 (4.59%) Cucumber
9 5 (4.59%) SpecFlow
9 5 (4.59%) Visual Studio
10 4 (3.67%) git-flow
10 4 (3.67%) JMeter
10 4 (3.67%) Mockito
10 4 (3.67%) Team Foundation Server
11 3 (2.75%) IntelliJ
11 3 (2.75%) Subversion
11 3 (2.75%) Visual Studio Team System
General
1 17 (15.60%) Finance
2 7 (6.42%) Advertising
3 4 (3.67%) Marketing
3 4 (3.67%) Publishing
4 3 (2.75%) Automotive
4 3 (2.75%) Public Sector
5 2 (1.83%) Banking
5 2 (1.83%) Law
5 2 (1.83%) Pharmaceutical
6 1 (0.92%) Italian Language
Job Titles
1 56 (51.38%) Developer
2 13 (11.93%) Java Developer
3 12 (11.01%) DevOps Engineer
3 12 (11.01%) Senior Developer
4 10 (9.17%) Architect
5 8 (7.34%) Angular Developer
6 6 (5.50%) .NET Developer
6 6 (5.50%) Analyst
6 6 (5.50%) C# Developer
6 6 (5.50%) Full Stack Developer
7 5 (4.59%) Agile Developer
7 5 (4.59%) Author
7 5 (4.59%) Azure Developer
7 5 (4.59%) Front End Developer (Client-Side Developer)
7 5 (4.59%) JavaScript Developer
7 5 (4.59%) Solutions Architect
7 5 (4.59%) SQL Developer
7 5 (4.59%) Technical Author
7 5 (4.59%) Technical Writer
7 5 (4.59%) Tester
Libraries, Frameworks & Software Standards
1 47 (43.12%) XML
2 40 (36.70%) REST
3 34 (31.19%) Web Services
4 31 (28.44%) HTML
5 28 (25.69%) CSS
6 25 (22.94%) AngularJS
7 19 (17.43%) SOAP
7 19 (17.43%) Spring
8 16 (14.68%) .NET
9 14 (12.84%) Node.js
10 12 (11.01%) HTML5
10 12 (11.01%) React
11 11 (10.09%) RESTful
12 9 (8.26%) ASP.NET Web API
13 8 (7.34%) Hibernate
13 8 (7.34%) jQuery
13 8 (7.34%) JSON Schema
14 7 (6.42%) .NET Framework
14 7 (6.42%) Java EE
14 7 (6.42%) Spring Boot
Miscellaneous
1 9 (8.26%) Analytical Skills
1 9 (8.26%) User Experience
2 8 (7.34%) Enterprise Software
3 7 (6.42%) Mobile App
4 5 (4.59%) Greenfield Project
4 5 (4.59%) Self-Motivation
5 4 (3.67%) Mobile Payment
6 3 (2.75%) Cloud Native
6 3 (2.75%) Data Structures
6 3 (2.75%) Enterprise Cloud
6 3 (2.75%) Reinsurance
7 2 (1.83%) Algorithms
7 2 (1.83%) Client/Server
7 2 (1.83%) Cyberthreat
7 2 (1.83%) Derivative
7 2 (1.83%) Reference Data
8 1 (0.92%) Animation
8 1 (0.92%) Life Science
8 1 (0.92%) Private Cloud
Operating Systems
1 23 (21.10%) Linux
2 11 (10.09%) Red Hat Enterprise Linux
3 6 (5.50%) Apple iOS
4 5 (4.59%) Android
4 5 (4.59%) Windows
5 3 (2.75%) Unix
6 2 (1.83%) CentOS
6 2 (1.83%) Debian
6 2 (1.83%) Mac OS X
6 2 (1.83%) Solaris
6 2 (1.83%) Ubuntu
Processes & Methodologies
1 57 (52.29%) Agile Software Development
2 28 (25.69%) DevOps
3 25 (22.94%) Scrum
4 21 (19.27%) Microservices
5 20 (18.35%) Continuous Integration
6 19 (17.43%) SDLC
7 17 (15.60%) TDD
8 16 (14.68%) Open Source
9 14 (12.84%) Kanban
10 12 (11.01%) Continuous Delivery
11 11 (10.09%) API Development
11 11 (10.09%) Configuration Management
11 11 (10.09%) Front End Development
11 11 (10.09%) Test Automation
12 10 (9.17%) Data Modelling
12 10 (9.17%) MVC
12 10 (9.17%) UML
12 10 (9.17%) Web Development
13 9 (8.26%) Computer Science
13 9 (8.26%) Unit Testing
Programming Languages
1 48 (44.04%) JavaScript
2 47 (43.12%) Java
3 38 (34.86%) SQL
4 27 (24.77%) Python
5 25 (22.94%) C#
6 17 (15.60%) Bash Shell
6 17 (15.60%) Ruby
7 13 (11.93%) Perl
8 8 (7.34%) Kotlin
9 6 (5.50%) PL/SQL
9 6 (5.50%) PowerShell
9 6 (5.50%) T-SQL
10 4 (3.67%) Clojure
10 4 (3.67%) Scala
11 3 (2.75%) Java 8
11 3 (2.75%) Shell Script
11 3 (2.75%) TypeScript
12 2 (1.83%) C
12 2 (1.83%) C++
12 2 (1.83%) VBA
Qualifications
1 16 (14.68%) Security Cleared
2 9 (8.26%) RHCE
3 6 (5.50%) SC Cleared
4 5 (4.59%) Degree
5 4 (3.67%) AWS Certification
6 3 (2.75%) Computer Science Degree
6 3 (2.75%) DV Cleared
7 2 (1.83%) ISEB
8 1 (0.92%) CCIE
8 1 (0.92%) CCNA
8 1 (0.92%) Cisco Certification
Quality Assurance & Compliance
1 6 (5.50%) QA
2 2 (1.83%) ISO/IEC 27001
2 2 (1.83%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
2 2 (1.83%) NIST
2 2 (1.83%) PCI DSS
2 2 (1.83%) SLA
3 1 (0.92%) GxP
System Software
1 18 (16.51%) Docker
2 2 (1.83%) Apache ZooKeeper
2 2 (1.83%) HDFS
Systems Management
1 9 (8.26%) Opscode Chef
1 9 (8.26%) Suricata
2 6 (5.50%) Kubernetes
3 3 (2.75%) Terraform
4 2 (1.83%) Hadoop YARN
4 2 (1.83%) Puppet
4 2 (1.83%) Salt
5 1 (0.92%) MIIS
Vendors
1 13 (11.93%) Oracle
2 9 (8.26%) Qualys
2 9 (8.26%) Red Hat
2 9 (8.26%) Splunk
3 7 (6.42%) Microsoft
4 6 (5.50%) ServiceNow
5 4 (3.67%) Google
6 3 (2.75%) Cloudera
6 3 (2.75%) Sybase
6 3 (2.75%) Tableau
6 3 (2.75%) WSO2
7 2 (1.83%) Bloomberg
7 2 (1.83%) Hortonworks
7 2 (1.83%) hybris
7 2 (1.83%) InterSystems
7 2 (1.83%) Reuters
7 2 (1.83%) Sencha
7 2 (1.83%) TIBCO
8 1 (0.92%) ESRI
8 1 (0.92%) FatWire