Period
to 15 April 2021

The following table provides summary statistics for contract job vacancies advertised in 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 15 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
England > London
6 months to
15 Apr 2021
Same period 2020 Same period 2019
Rank 129 134 103
Rank change year-on-year +5 -31 +13
Contract jobs citing JSON 455 484 1,087
As % of all contract jobs advertised in London 2.08% 2.00% 2.56%
As % of the Libraries, Frameworks & Software Standards category 5.75% 5.34% 6.89%
Number of daily rates quoted 322 291 727
10th Percentile £363 £350 £400
25th Percentile £425 £413 £443
Median daily rate (50th Percentile) £500 £500 £500
75th Percentile £575 £594 £575
90th Percentile £675 £690 £638
England median daily rate £475 £475 £500
% change year-on-year - -5.00% +5.26%
Number of hourly rates quoted 5 2 0
Median hourly rate £68.00 £48.85 -
Median % change year-on-year +39.20% - -
England median hourly rate £51.00 £50.50 £55.00
% change year-on-year +0.99% -8.18% +22.22%

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

All Software Libraries and Frameworks
London
Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills 7,909 9,064 15,770
As % of all contract IT jobs advertised in London 36.13% 37.43% 37.10%
Number of daily rates quoted 5,938 6,739 11,963
10th Percentile £375 £375 £370
25th Percentile £440 £450 £443
Median daily rate (50th Percentile) £525 £525 £525
75th Percentile £625 £625 £600
90th Percentile £700 £700 £675
England median daily rate £500 £500 £500
Number of hourly rates quoted 37 53 67
10th Percentile £19.75 £24.74 £23.37
25th Percentile £32.50 £44.43 £27.63
Median hourly rate £47.50 £50.00 £43.92
Median % change year-on-year -5.00% +13.86% +17.11%
75th Percentile £63.75 £65.54 £47.83
90th Percentile £68.00 £78.75 £53.75
England median hourly rate £45.00 £46.00 £44.18
% change year-on-year -2.17% +4.12% +7.76%

JSON
Job Vacancy Trend in London

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

Job vacancy trend for JSON in London

JSON
Contractor Daily Rate Trend in London

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

Daily rate trend for JSON in London

JSON
Daily Rate Histogram in London

Daily rate distribution for jobs citing JSON in London over the 6 months to 15 April 2021.

Daily rate histogram for JSON in London

JSON
Contractor Hourly Rate Trend in London

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

Hourly rate trend for JSON in London

JSON
Hourly Rate Histogram in London

Hourly rate distribution of jobs citing JSON in London over the 6 months to 15 April 2021.

Hourly rate histogram for JSON in London

JSON
Contract Job Locations in 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 London region over the 6 months to 15 April 2021. 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
Central London +26 45 £500 - 37
East London +27 10 £500 +8.11% 8
South London +23 6 £500 -21.88% 4
West London +17 6 £475 +11.76% 20
JSON
England

For the 6 months to 15 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 London region with a requirement for JSON.

1 193 (42.42%) XML
2 189 (41.54%) Agile Software Development
3 172 (37.80%) Java
4 144 (31.65%) Azure
5 129 (28.35%) SQL
6 118 (25.93%) REST
7 116 (25.49%) JavaScript
8 111 (24.40%) Jenkins
9 110 (24.18%) Finance
10 108 (23.74%) Web Services
10 108 (23.74%) Git (software)
10 108 (23.74%) RESTful
11 106 (23.30%) HTML
12 93 (20.44%) DevOps
13 91 (20.00%) AWS
14 89 (19.56%) Python
15 83 (18.24%) TDD
16 82 (18.02%) Microservices
17 80 (17.58%) SOAP
18 79 (17.36%) CSS
19 70 (15.38%) SQL Server
20 68 (14.95%) JIRA
20 68 (14.95%) Test Automation
21 67 (14.73%) Security Cleared
21 67 (14.73%) Data Modelling
22 65 (14.29%) Business Intelligence
22 65 (14.29%) Continuous Integration
23 64 (14.07%) Docker
24 60 (13.19%) GitHub
24 60 (13.19%) Spring

JSON
Co-occurring IT Skills in 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 43 (9.45%) Confluence
2 24 (5.27%) Apache Spark
3 15 (3.30%) CMS
3 15 (3.30%) Red Hat Fuse
4 14 (3.08%) WebSphere
5 12 (2.64%) Apache
6 11 (2.42%) JBoss
7 10 (2.20%) Oracle SOA Suite
7 10 (2.20%) SharePoint
8 9 (1.98%) Mule
8 9 (1.98%) Tomcat
8 9 (1.98%) WebLogic
9 7 (1.54%) Cloud Foundry
9 7 (1.54%) Elasticsearch
10 6 (1.32%) BizTalk Server
10 6 (1.32%) Camunda
10 6 (1.32%) Oracle Service Bus
11 5 (1.10%) Anypoint
11 5 (1.10%) IIS
11 5 (1.10%) MQSeries
Applications
1 11 (2.42%) Photoshop
2 10 (2.20%) Chatbot
3 5 (1.10%) Microsoft Office
4 3 (0.66%) Microsoft PowerPoint
4 3 (0.66%) MS Visio
5 2 (0.44%) Adobe XD
5 2 (0.44%) Microsoft Excel
6 1 (0.22%) Microsoft Project
6 1 (0.22%) Spreadsheet
Business Applications
1 8 (1.76%) Sparx Enterprise Architect
2 3 (0.66%) Distributed Ledger
2 3 (0.66%) Summit
3 1 (0.22%) BusinessWorks
3 1 (0.22%) Dynamics NAV
3 1 (0.22%) Oracle BPM
3 1 (0.22%) Oracle ERP
3 1 (0.22%) SAP Hybris
3 1 (0.22%) Tesseract
Cloud Services
1 144 (31.65%) Azure
2 91 (20.00%) AWS
3 60 (13.19%) GitHub
4 39 (8.57%) Power Platform
5 33 (7.25%) GCP
5 33 (7.25%) IaaS
6 31 (6.81%) PaaS
7 28 (6.15%) Amazon S3
8 26 (5.71%) PowerApps
9 25 (5.49%) Logic Apps
10 23 (5.05%) Serverless
11 17 (3.74%) Google Analytics
12 14 (3.08%) Boomi
12 14 (3.08%) OpenShift
12 14 (3.08%) SaaS
13 13 (2.86%) AWS Lambda
13 13 (2.86%) Power Automate
14 10 (2.20%) Azure Data Factory
14 10 (2.20%) npm
15 9 (1.98%) Amazon CloudWatch
Communications & Networking
1 47 (10.33%) HTTP
2 14 (3.08%) HTTPS
3 8 (1.76%) Internet
4 7 (1.54%) LAN
4 7 (1.54%) RTMP
4 7 (1.54%) WAN
5 5 (1.10%) Firewall
6 4 (0.88%) DNS
6 4 (0.88%) TCP/IP
7 3 (0.66%) IPFS
8 2 (0.44%) AMQP
8 2 (0.44%) Cisco Nexus
8 2 (0.44%) F5 BIG-IP GTM
8 2 (0.44%) Network Security
8 2 (0.44%) SGSN
8 2 (0.44%) Software-Defined Networking
8 2 (0.44%) SSH
8 2 (0.44%) VXLAN
8 2 (0.44%) Wi-Fi
8 2 (0.44%) Wireshark
Database & Business Intelligence
1 70 (15.38%) SQL Server
2 57 (12.53%) Relational Database
3 36 (7.91%) RDBMS
4 35 (7.69%) PostgreSQL
5 30 (6.59%) Data Warehouse
6 26 (5.71%) MongoDB
6 26 (5.71%) NoSQL
7 21 (4.62%) Big Data
8 20 (4.40%) Hadoop
8 20 (4.40%) MySQL
9 19 (4.18%) Power BI
10 18 (3.96%) Cosmos DB
10 18 (3.96%) Tableau
11 17 (3.74%) SQL Server Integration Services
12 15 (3.30%) Apache Hive
13 12 (2.64%) Azure SQL Database
13 12 (2.64%) Parquet
14 11 (2.42%) Snowflake Schema
15 10 (2.20%) Oracle Database
16 9 (1.98%) Star Schema
Development Applications
1 111 (24.40%) Jenkins
2 108 (23.74%) Git (software)
3 68 (14.95%) JIRA
4 42 (9.23%) JUnit
5 34 (7.47%) Maven
6 23 (5.05%) Visual Studio
7 21 (4.62%) Gradle
8 17 (3.74%) Xcode
9 16 (3.52%) Sonatype Nexus
10 13 (2.86%) Mockito
10 13 (2.86%) SonarQube
10 13 (2.86%) Team Foundation Server
11 12 (2.64%) Artifactory
11 12 (2.64%) Eclipse
11 12 (2.64%) Selenium
11 12 (2.64%) Visual Studio Team System
12 11 (2.42%) Cucumber
12 11 (2.42%) TeamCity
13 10 (2.20%) fastlane
14 9 (1.98%) IntelliJ
General
1 110 (24.18%) Finance
2 43 (9.45%) Banking
2 43 (9.45%) Public Sector
3 30 (6.59%) Marketing
4 23 (5.05%) Telecoms
5 22 (4.84%) Manufacturing
6 19 (4.18%) Electronics
7 11 (2.42%) Law
8 8 (1.76%) Investment Banking
9 7 (1.54%) Legal
10 4 (0.88%) Advertising
10 4 (0.88%) French Language
10 4 (0.88%) Publishing
10 4 (0.88%) Retail
11 2 (0.44%) Back Office
11 2 (0.44%) Front Office
11 2 (0.44%) Pharmaceutical
11 2 (0.44%) Police
11 2 (0.44%) Retail Banking
12 1 (0.22%) Games
Job Titles
1 206 (45.27%) Developer
2 75 (16.48%) Architect
3 51 (11.21%) Java Developer
4 30 (6.59%) Senior Developer
5 29 (6.37%) DevOps Engineer
6 27 (5.93%) Analyst
7 25 (5.49%) Front End Developer (Client-Side Developer)
8 22 (4.84%) Data Architect
8 22 (4.84%) Data Engineer
9 19 (4.18%) React Developer
10 18 (3.96%) Azure Engineer
11 16 (3.52%) Full Stack Developer
11 16 (3.52%) Solutions Architect
12 15 (3.30%) iOS Developer
13 14 (3.08%) Integration Developer
13 14 (3.08%) Senior Java Developer
13 14 (3.08%) Tester
14 13 (2.86%) C# Developer
14 13 (2.86%) SC Cleared Java Developer
14 13 (2.86%) Software Engineer
Libraries, Frameworks & Software Standards
1 193 (42.42%) XML
2 118 (25.93%) REST
3 108 (23.74%) RESTful
3 108 (23.74%) Web Services
4 106 (23.30%) HTML
5 80 (17.58%) SOAP
6 79 (17.36%) CSS
7 60 (13.19%) Spring
8 52 (11.43%) .NET
9 45 (9.89%) HTML5
9 45 (9.89%) React
9 45 (9.89%) XSLT
10 44 (9.67%) Node.js
10 44 (9.67%) YAML
11 32 (7.03%) jQuery
12 27 (5.93%) CSS3
12 27 (5.93%) Spring Boot
13 24 (5.27%) Middleware
14 23 (5.05%) Kafka
15 22 (4.84%) AngularJS
Miscellaneous
1 32 (7.03%) User Experience
2 21 (4.62%) Analytical Skills
3 18 (3.96%) Mobile App
4 17 (3.74%) Data Structures
5 14 (3.08%) Linux Command Line
6 13 (2.86%) Enterprise Software
7 12 (2.64%) iPad
8 11 (2.42%) W3C
9 10 (2.20%) Public Cloud
9 10 (2.20%) Reference Data
10 9 (1.98%) Animation
10 9 (1.98%) Client/Server
10 9 (1.98%) Graphic Design
10 9 (1.98%) iPhone
11 8 (1.76%) Cloud Native
12 6 (1.32%) Equities
12 6 (1.32%) Semantic Web
13 5 (1.10%) Data Centre
13 5 (1.10%) Management Information System
14 4 (0.88%) VSAM
Operating Systems
1 57 (12.53%) Linux
2 31 (6.81%) Windows
3 25 (5.49%) Unix
4 23 (5.05%) Apple iOS
5 17 (3.74%) Android
6 9 (1.98%) Mac OS
7 5 (1.10%) Ubuntu
8 4 (0.88%) Mac OS X
9 3 (0.66%) CoreOS
9 3 (0.66%) Debian
9 3 (0.66%) Solaris
9 3 (0.66%) VMS
9 3 (0.66%) Windows Server
10 2 (0.44%) CentOS
10 2 (0.44%) Windows Server 2012
11 1 (0.22%) Red Hat Enterprise Linux
11 1 (0.22%) webOS
11 1 (0.22%) Windows 10
11 1 (0.22%) Windows 7
11 1 (0.22%) Windows Server 2008
Processes & Methodologies
1 189 (41.54%) Agile Software Development
2 93 (20.44%) DevOps
3 83 (18.24%) TDD
4 82 (18.02%) Microservices
5 68 (14.95%) Test Automation
6 67 (14.73%) Data Modelling
7 65 (14.29%) Business Intelligence
7 65 (14.29%) Continuous Integration
8 58 (12.75%) Scrum
9 55 (12.09%) SOA
10 42 (9.23%) Migration
11 39 (8.57%) Front End Development
12 34 (7.47%) MVC
13 32 (7.03%) Analytics
14 31 (6.81%) Problem-Solving
14 31 (6.81%) Software Engineering
15 29 (6.37%) ETL
16 28 (6.15%) Unit Testing
17 27 (5.93%) Continuous Delivery
18 26 (5.71%) API Design
Programming Languages
1 172 (37.80%) Java
2 129 (28.35%) SQL
3 116 (25.49%) JavaScript
4 89 (19.56%) Python
5 59 (12.97%) C#
6 46 (10.11%) PowerShell
7 25 (5.49%) Bash Shell
8 21 (4.62%) Apple Swift
9 20 (4.40%) PL/SQL
10 19 (4.18%) T-SQL
10 19 (4.18%) XPath
11 18 (3.96%) Kotlin
12 17 (3.74%) C++
13 16 (3.52%) Java 8
14 15 (3.30%) Scala
15 14 (3.08%) Objective-C
15 14 (3.08%) Shell Script
16 13 (2.86%) TypeScript
17 12 (2.64%) PHP
18 11 (2.42%) C
Qualifications
1 67 (14.73%) Security Cleared
2 57 (12.53%) SC Cleared
3 10 (2.20%) Degree
4 8 (1.76%) AWS Certification
5 6 (1.32%) Computer Science Degree
6 4 (0.88%) DV Cleared
7 1 (0.22%) BPSS Clearance
7 1 (0.22%) CCIE
7 1 (0.22%) Cisco Certification
7 1 (0.22%) CITP
7 1 (0.22%) Postgraduate
Quality Assurance & Compliance
1 32 (7.03%) QA
2 5 (1.10%) Data Quality
3 2 (0.44%) Actionable Recommendations
3 2 (0.44%) OASIS TOSCA
4 1 (0.22%) GDPR
System Software
1 64 (14.07%) Docker
2 11 (2.42%) HDFS
3 4 (0.88%) Active Directory
4 3 (0.66%) LXC
5 2 (0.44%) Apache ZooKeeper
5 2 (0.44%) KVM
5 2 (0.44%) Virtual Machines
5 2 (0.44%) VMware ESXi
5 2 (0.44%) VMware Infrastructure
Systems Management
1 56 (12.31%) Kubernetes
2 47 (10.33%) Ansible
3 37 (8.13%) Terraform
4 13 (2.86%) Puppet
5 10 (2.20%) Grafana
6 9 (1.98%) Opscode Chef
7 8 (1.76%) Docker Swarm
8 7 (1.54%) Prometheus
9 4 (0.88%) Hadoop YARN
9 4 (0.88%) Mesos
9 4 (0.88%) Packer
10 3 (0.66%) Consul
10 3 (0.66%) Istio
10 3 (0.66%) Rancher
11 2 (0.44%) Cloudify
11 2 (0.44%) Juju
11 2 (0.44%) Marathon
11 2 (0.44%) Oozie
12 1 (0.22%) Kibana
12 1 (0.22%) logstash
Vendors
1 60 (13.19%) Microsoft
2 54 (11.87%) Oracle
3 35 (7.69%) Google
4 26 (5.71%) SAP
5 18 (3.96%) MuleSoft
6 17 (3.74%) Red Hat
7 16 (3.52%) Salesforce.com
8 14 (3.08%) Dell
9 12 (2.64%) webMethods
10 11 (2.42%) Adobe
11 10 (2.20%) Atlassian
12 9 (1.98%) Optimizely
12 9 (1.98%) TIBCO
13 8 (1.76%) IBM
13 8 (1.76%) ServiceNow
13 8 (1.76%) Sparx
13 8 (1.76%) Talend
14 7 (1.54%) Cisco
14 7 (1.54%) Splunk
14 7 (1.54%) VMware