Period
to 17 October 2019

The following table provides summary statistics for contract job vacancies advertised in Central 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 17 October 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
London > Central London
6 months to
17 Oct 2019
Same period 2018 Same period 2017
Rank 119 110 90
Rank change year-on-year -9 -20 0
Contract jobs citing JSON 149 224 220
As % of all contract IT jobs advertised in Central London 1.96% 2.46% 2.73%
As % of the Libraries, Frameworks & Software Standards category 5.33% 5.95% 7.29%
Number of daily rates quoted 113 187 176
Central London median daily rate £500 £500 £474
Median daily rate % change year-on-year - +5.54% +5.28%
10th Percentile £301 £403 £375
90th Percentile £650 £625 £638
London median daily rate £525 £500 £475
% change year-on-year +5.00% +5.26% +5.56%
Number of hourly rates quoted 2 0 0
Central London median hourly rate £42.42 - -
London median hourly rate £63.33 £35.00 £32.50
% change year-on-year +80.94% +7.69% -36.27%

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 Central London with a requirement for technical specification, industry standards, software libraries and framework skills.

All Software Libraries and Frameworks
Central London
Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 2,795 3,766 3,018
As % of all contract IT jobs advertised in Central London 36.76% 41.37% 37.42%
Number of daily rates quoted 2,268 3,081 2,449
Central London median daily rate £525 £525 £500
Median daily rate % change year-on-year - +5.00% +8.11%
10th Percentile £400 £375 £355
90th Percentile £675 £663 £650
London median daily rate £525 £525 £500
% change year-on-year - +5.00% +11.11%
Number of hourly rates quoted 6 9 11
Central London median hourly rate £46.85 £32.00 £21.50
Median hourly rate % change year-on-year +46.40% +48.84% -38.57%
10th Percentile £31.06 £19.76 £18.50
90th Percentile £60.25 £70.15 £25.86
London median hourly rate £47.83 £43.50 £30.38
% change year-on-year +9.95% +43.21% -28.53%

JSON
Job Vacancy Trend in Central London

Job postings citing JSON as a percentage of all IT jobs advertised in Central London.

Job vacancy trend for JSON in Central London

JSON
Contractor Daily Rate Trend in Central London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing JSON in Central London.

Contractor daily rate trend for JSON in Central London

JSON
Contractor Daily Rate Histogram in Central London

The daily rate distribution of IT jobs citing JSON in Central London over the 6 months to 17 October 2019.

Contractor daily rate histogram for JSON in Central London

JSON
Contractor Hourly Rate Trend in Central London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing JSON in Central London.

Contractor hourly rate trend for JSON in Central London

JSON
Contractor Hourly Rate Histogram in Central London

The hourly rate distribution of IT jobs citing JSON in Central London over the 6 months to 17 October 2019.

Contractor hourly rate histogram for JSON in Central London

JSON
Contract Job Locations in Central London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing JSON within the Central London region over the 6 months to 17 October 2019. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London -13 118 £538 +7.50% 36
West End of London +22 8 £375 -36.17%
City of Westminster -8 2 £525 +9.66%
Kensington and Chelsea - 2 £275 -
Southwark +1 1 £525 +10.53%
JSON
London

For the 6 months to 17 October 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 Central London region with a requirement for JSON.

1 74 (49.66%) Agile Software Development
2 67 (44.97%) XML
3 62 (41.61%) JavaScript
4 59 (39.60%) REST
5 58 (38.93%) Java
6 52 (34.90%) SQL
7 45 (30.20%) Web Services
8 41 (27.52%) Python
8 41 (27.52%) Git (software)
9 37 (24.83%) HTML
10 35 (23.49%) Azure
10 35 (23.49%) DevOps
10 35 (23.49%) Microservices
11 34 (22.82%) AngularJS
11 34 (22.82%) Linux
12 33 (22.15%) Scrum
13 31 (20.81%) CSS
13 31 (20.81%) AWS
14 29 (19.46%) C#
15 26 (17.45%) TDD
16 25 (16.78%) Finance
16 25 (16.78%) Docker
17 22 (14.77%) Ruby
18 21 (14.09%) Continuous Integration
18 21 (14.09%) Unit Testing
18 21 (14.09%) Jenkins
19 20 (13.42%) Bash Shell
19 20 (13.42%) SQL Server
20 19 (12.75%) SOAP
20 19 (12.75%) .NET

JSON
Co-occurring IT Skills in Central 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 10 (6.71%) Confluence
2 8 (5.37%) CMS
3 7 (4.70%) ArcGIS
3 7 (4.70%) GeoServer
3 7 (4.70%) SharePoint
4 5 (3.36%) Apache Spark
5 4 (2.68%) Apache
5 4 (2.68%) Cloud Foundry
5 4 (2.68%) JBoss
5 4 (2.68%) Tomcat
5 4 (2.68%) WebSphere
6 3 (2.01%) Elasticsearch
6 3 (2.01%) IIS
7 2 (1.34%) Apache Solr
7 2 (1.34%) Jetty
7 2 (1.34%) Jupyter
7 2 (1.34%) Magnolia
7 2 (1.34%) Oracle Self-Service HR
7 2 (1.34%) WebLogic
8 1 (0.67%) Mule
Applications
1 2 (1.34%) Microsoft Excel
Business Applications
1 5 (3.36%) Dynamics CRM
2 4 (2.68%) Dynamics AX
2 4 (2.68%) Dynamics NAV
3 2 (1.34%) BusinessWorks
4 1 (0.67%) Sparx Enterprise Architect
4 1 (0.67%) WebTrends
Cloud Services
1 35 (23.49%) Azure
2 31 (20.81%) AWS
3 10 (6.71%) Power Platform
4 8 (5.37%) Amazon EC2
4 8 (5.37%) Office 365
5 7 (4.70%) Datadog
6 6 (4.03%) Amazon S3
6 6 (4.03%) Dynamics 365
6 6 (4.03%) Serverless
6 6 (4.03%) Virtual Private Cloud
7 5 (3.36%) GitHub
8 4 (2.68%) AWS CloudFormation
8 4 (2.68%) AWS Lambda
9 3 (2.01%) Amazon ELB
9 3 (2.01%) npm
10 2 (1.34%) Amazon CloudWatch
10 2 (1.34%) Amazon EMR
10 2 (1.34%) Amazon Kinesis
10 2 (1.34%) AWS CloudTrail
10 2 (1.34%) GCP
Communications & Networking
1 9 (6.04%) VPN
2 7 (4.70%) Internet
3 2 (1.34%) HTTP
3 2 (1.34%) Intranet
3 2 (1.34%) SSH
4 1 (0.67%) DNS
4 1 (0.67%) Firewall
4 1 (0.67%) Network Security
4 1 (0.67%) VLAN
Database & Business Intelligence
1 20 (13.42%) SQL Server
2 15 (10.07%) PostgreSQL
3 12 (8.05%) NoSQL
4 10 (6.71%) Power BI
5 8 (5.37%) Amazon RDS
5 8 (5.37%) Big Data
5 8 (5.37%) Data Lake
5 8 (5.37%) Data Warehouse
5 8 (5.37%) MongoDB
5 8 (5.37%) MySQL
5 8 (5.37%) Relational Database
6 7 (4.70%) Geospatial Data
6 7 (4.70%) GIS
6 7 (4.70%) QGIS
7 6 (4.03%) Amazon DynamoDB
8 5 (3.36%) Hadoop
8 5 (3.36%) Oracle Database
8 5 (3.36%) SQL Server Integration Services
9 3 (2.01%) Amazon Athena
9 3 (2.01%) RDBMS
Development Applications
1 41 (27.52%) Git (software)
2 21 (14.09%) Jenkins
3 17 (11.41%) JIRA
4 11 (7.38%) Subversion
5 10 (6.71%) Maven
6 9 (6.04%) Sonatype Nexus
7 8 (5.37%) Atlassian Bamboo
8 6 (4.03%) Selenium
8 6 (4.03%) Visual Studio
9 5 (3.36%) Bitbucket
9 5 (3.36%) Team Foundation Server
9 5 (3.36%) Visual Studio Team System
10 4 (2.68%) Gradle
10 4 (2.68%) NUnit
11 3 (2.01%) Cucumber
11 3 (2.01%) IntelliJ
11 3 (2.01%) JUnit
11 3 (2.01%) PowerDesigner
11 3 (2.01%) SpecFlow
11 3 (2.01%) TeamCity
General
1 25 (16.78%) Finance
2 12 (8.05%) Banking
3 7 (4.70%) Advertising
4 5 (3.36%) Marketing
4 5 (3.36%) Public Sector
5 4 (2.68%) Publishing
5 4 (2.68%) Retail Banking
6 3 (2.01%) Automotive
6 3 (2.01%) Investment Banking
7 2 (1.34%) Law
8 1 (0.67%) Games
8 1 (0.67%) Italian Language
8 1 (0.67%) Pharmaceutical
8 1 (0.67%) Retail
Job Titles
1 80 (53.69%) Developer
2 17 (11.41%) Architect
3 16 (10.74%) Senior Developer
4 14 (9.40%) DevOps Engineer
4 14 (9.40%) Java Developer
5 10 (6.71%) Angular Developer
6 7 (4.70%) Front End Developer (Client-Side Developer)
6 7 (4.70%) GIS Developer
7 6 (4.03%) Azure Engineer
7 6 (4.03%) C# Developer
8 5 (3.36%) Analyst
8 5 (3.36%) Author
8 5 (3.36%) Azure Developer
8 5 (3.36%) Azure DevOps
8 5 (3.36%) Azure DevOps Engineer
8 5 (3.36%) JavaScript Developer
8 5 (3.36%) SQL Developer
8 5 (3.36%) Technical Author
8 5 (3.36%) Technical Writer
8 5 (3.36%) Web Developer
Libraries, Frameworks & Software Standards
1 67 (44.97%) XML
2 59 (39.60%) REST
3 45 (30.20%) Web Services
4 37 (24.83%) HTML
5 34 (22.82%) AngularJS
6 31 (20.81%) CSS
7 19 (12.75%) .NET
7 19 (12.75%) SOAP
7 19 (12.75%) Spring
8 18 (12.08%) Node.js
9 17 (11.41%) RESTful
10 14 (9.40%) HTML5
11 13 (8.72%) React
12 10 (6.71%) CSS3
12 10 (6.71%) JSON Schema
13 9 (6.04%) Hibernate
13 9 (6.04%) jQuery
14 8 (5.37%) .NET Framework
14 8 (5.37%) ASP.NET Web API
14 8 (5.37%) Java EE
Miscellaneous
1 17 (11.41%) User Experience
2 11 (7.38%) Analytical Skills
3 8 (5.37%) Enterprise Software
4 6 (4.03%) Greenfield Project
4 6 (4.03%) Self-Motivation
5 5 (3.36%) Mobile App
6 3 (2.01%) Cloud Native
6 3 (2.01%) Enterprise Cloud
6 3 (2.01%) Reinsurance
6 3 (2.01%) Taxonomies
7 2 (1.34%) Algorithms
7 2 (1.34%) Client/Server
7 2 (1.34%) Cyberthreat
7 2 (1.34%) Derivative
7 2 (1.34%) Reference Data
8 1 (0.67%) Data Structures
8 1 (0.67%) Digital Media
8 1 (0.67%) Management Information System
8 1 (0.67%) Private Cloud
Operating Systems
1 34 (22.82%) Linux
2 13 (8.72%) Red Hat Enterprise Linux
3 10 (6.71%) Windows
4 8 (5.37%) Android
4 8 (5.37%) Apple iOS
5 4 (2.68%) CentOS
5 4 (2.68%) Mac OS X
5 4 (2.68%) Unix
6 2 (1.34%) Debian
6 2 (1.34%) Mac OS X Server
6 2 (1.34%) Solaris
6 2 (1.34%) Ubuntu
7 1 (0.67%) Windows Server
Processes & Methodologies
1 74 (49.66%) Agile Software Development
2 35 (23.49%) DevOps
2 35 (23.49%) Microservices
3 33 (22.15%) Scrum
4 26 (17.45%) TDD
5 21 (14.09%) Continuous Integration
5 21 (14.09%) Unit Testing
6 19 (12.75%) Open Source
7 18 (12.08%) Continuous Delivery
8 17 (11.41%) SDLC
9 16 (10.74%) Business Intelligence
10 15 (10.07%) Data Modelling
11 14 (9.40%) Kanban
12 13 (8.72%) Front End Development
12 13 (8.72%) Test Automation
13 12 (8.05%) ETL
14 11 (7.38%) API Development
14 11 (7.38%) Fintech
15 10 (6.71%) BDD
15 10 (6.71%) Configuration Management
Programming Languages
1 62 (41.61%) JavaScript
2 58 (38.93%) Java
3 52 (34.90%) SQL
4 41 (27.52%) Python
5 29 (19.46%) C#
6 22 (14.77%) Ruby
7 20 (13.42%) Bash Shell
8 15 (10.07%) Perl
9 11 (7.38%) PowerShell
10 9 (6.04%) Shell Script
11 7 (4.70%) T-SQL
12 6 (4.03%) Scala
13 5 (3.36%) Clojure
13 5 (3.36%) Kotlin
13 5 (3.36%) PL/SQL
14 4 (2.68%) TypeScript
15 3 (2.01%) C++
15 3 (2.01%) Groovy
15 3 (2.01%) XPath
16 2 (1.34%) VB6
Qualifications
1 15 (10.07%) Security Cleared
2 9 (6.04%) RHCE
3 5 (3.36%) SC Cleared
4 4 (2.68%) AWS Certification
4 4 (2.68%) Degree
5 1 (0.67%) Computer Science Degree
5 1 (0.67%) CTC Cleared
5 1 (0.67%) DV Cleared
5 1 (0.67%) Master's Degree
Quality Assurance & Compliance
1 7 (4.70%) QA
2 4 (2.68%) SLA
3 2 (1.34%) ISO/IEC 27001
3 2 (1.34%) ISO/IEC 27002 (supersedes ISO/IEC 17799)
3 2 (1.34%) NIST
3 2 (1.34%) PCI DSS
4 1 (0.67%) Data Quality
4 1 (0.67%) PMO
System Software
1 25 (16.78%) Docker
2 4 (2.68%) Active Directory
3 2 (1.34%) Apache ZooKeeper
3 2 (1.34%) HDFS
4 1 (0.67%) VirtualBox
4 1 (0.67%) VMware ESXi
4 1 (0.67%) VMware Infrastructure
Systems Management
1 9 (6.04%) Opscode Chef
1 9 (6.04%) Suricata
2 7 (4.70%) Kubernetes
3 4 (2.68%) Terraform
4 2 (1.34%) Hadoop YARN
4 2 (1.34%) Jamf Pro
4 2 (1.34%) Puppet
4 2 (1.34%) Salt
5 1 (0.67%) Microsoft Data Protection Manager
5 1 (0.67%) Microsoft Intune
5 1 (0.67%) MIIS
5 1 (0.67%) Norton AntiVirus
5 1 (0.67%) SCCM
5 1 (0.67%) SCOM
5 1 (0.67%) Single Sign-On
5 1 (0.67%) Symantec Endpoint Protection
Vendors
1 19 (12.75%) Oracle
2 16 (10.74%) Microsoft
3 10 (6.71%) Red Hat
4 9 (6.04%) Qualys
4 9 (6.04%) Splunk
5 7 (4.70%) ESRI
6 6 (4.03%) Google
6 6 (4.03%) ServiceNow
6 6 (4.03%) Tableau
6 6 (4.03%) WSO2
7 4 (2.68%) IBM
8 3 (2.01%) Cloudera
8 3 (2.01%) hybris
8 3 (2.01%) InterSystems
9 2 (1.34%) Apple
9 2 (1.34%) Citrix
9 2 (1.34%) Hortonworks
9 2 (1.34%) Reuters
9 2 (1.34%) Sencha
9 2 (1.34%) TIBCO