Period
to 15 October 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 October 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 Oct 2021
Same period 2020 Same period 2019
Rank 149 165 119
Rank change year-on-year +16 -46 +10
Contract jobs citing JSON 668 232 859
As % of all contract jobs advertised in London 1.89% 1.69% 2.32%
As % of the Libraries, Frameworks & Software Standards category 5.49% 4.45% 6.36%
Number of daily rates quoted 477 147 572
10th Percentile £413 £360 £376
25th Percentile £475 £438 £450
Median daily rate (50th Percentile) £550 £520 £525
Median % change year-on-year +5.77% -0.95% +5.00%
75th Percentile £656 £582 £600
90th Percentile £738 £638 £725
England median daily rate £514 £475 £500
% change year-on-year +8.16% -5.00% +5.26%
Number of hourly rates quoted 3 2 8
10th Percentile £29.35 £40.80 £17.43
25th Percentile £34.38 £42.00 £51.56
Median hourly rate £43.50 £45.50 £115.00
Median % change year-on-year -4.40% -60.43% -
75th Percentile £62.13 £50.50 £122.50
90th Percentile £72.85 £52.60 "
England median hourly rate £65.50 £52.50 £60.00
% change year-on-year +24.76% -12.50% +71.43%

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 12,173 5,217 13,500
As % of all contract IT jobs advertised in London 34.36% 37.91% 36.41%
Number of daily rates quoted 9,138 3,857 10,178
10th Percentile £406 £363 £375
25th Percentile £475 £425 £450
Median daily rate (50th Percentile) £563 £525 £525
Median % change year-on-year +7.14% - -
75th Percentile £673 £625 £613
90th Percentile £738 £713 £688
England median daily rate £525 £500 £500
% change year-on-year +5.00% - +5.26%
Number of hourly rates quoted 49 20 62
10th Percentile £20.24 £22.38 £17.88
25th Percentile £35.00 £24.63 £36.70
Median hourly rate £49.00 £34.23 £50.00
Median % change year-on-year +43.17% -31.55% +17.65%
75th Percentile £63.50 £40.94 £53.00
90th Percentile £76.40 £50.75 £64.87
England median hourly rate £49.00 £42.00 £46.45
% change year-on-year +16.67% -9.58% +11.42%

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 October 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 October 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 October 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 -18 59 £575 +9.52% 62
East London +7 20 £480 +1.05% 15
South London +2 10 £540 +2.86% 7
West London -16 7 £500 +15.94% 26
JSON
England

For the 6 months to 15 October 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.

1 330 (49.40%) XML
2 319 (47.75%) Agile Software Development
3 232 (34.73%) REST
4 231 (34.58%) SQL
5 230 (34.43%) Java
6 205 (30.69%) JavaScript
7 197 (29.49%) DevOps
8 192 (28.74%) Git (software)
9 184 (27.54%) Azure
10 177 (26.50%) Finance
11 175 (26.20%) Python
12 171 (25.60%) Jenkins
13 156 (23.35%) HTML
14 143 (21.41%) C#
15 142 (21.26%) Test Automation
16 140 (20.96%) Web Services
16 140 (20.96%) Social Skills
17 139 (20.81%) SOAP
18 135 (20.21%) AWS
19 133 (19.91%) Microservices
20 123 (18.41%) CSS
21 121 (18.11%) .NET
22 117 (17.51%) Oracle
23 116 (17.37%) RESTful
24 109 (16.32%) SQL Server
25 102 (15.27%) Banking
26 98 (14.67%) AngularJS
27 96 (14.37%) GitHub
27 96 (14.37%) Windows
28 94 (14.07%) Linux

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 (6.44%) Confluence
2 36 (5.39%) Apache
3 27 (4.04%) Apache Spark
4 25 (3.74%) Elasticsearch
5 21 (3.14%) CMS
6 20 (2.99%) Tomcat
7 16 (2.40%) IIS
8 10 (1.50%) JBoss
8 10 (1.50%) nginx
8 10 (1.50%) WebLogic
9 8 (1.20%) Apache Airflow
9 8 (1.20%) WebSphere
10 7 (1.05%) Headless CMS
10 7 (1.05%) Luigi
11 6 (0.90%) Oracle SOA Suite
12 5 (0.75%) Cloud Foundry
12 5 (0.75%) Jetty
12 5 (0.75%) Oracle Workflow
12 5 (0.75%) SharePoint
13 4 (0.60%) BizTalk Server
Applications
1 28 (4.19%) Microsoft Excel
2 11 (1.65%) Chatbot
3 10 (1.50%) Microsoft PowerPoint
4 9 (1.35%) Microsoft Office
5 6 (0.90%) MS Visio
6 5 (0.75%) Microsoft Project
7 3 (0.45%) Mingle
8 2 (0.30%) Photoshop
9 1 (0.15%) Adobe XD
9 1 (0.15%) Spreadsheet
Business Applications
1 26 (3.89%) SunGard Martini
2 5 (0.75%) Sparx Enterprise Architect
3 4 (0.60%) Oracle ERP
4 3 (0.45%) Dynamics CRM
5 2 (0.30%) Endur
5 2 (0.30%) SAP CRM
6 1 (0.15%) BusinessWorks
6 1 (0.15%) Distributed Ledger
6 1 (0.15%) Magento
6 1 (0.15%) NetSuite
6 1 (0.15%) Oracle Cash Management
6 1 (0.15%) Salesforce.com CRM
6 1 (0.15%) SimCorp Dimension
6 1 (0.15%) Workday HCM
Cloud Services
1 184 (27.54%) Azure
2 135 (20.21%) AWS
3 96 (14.37%) GitHub
4 37 (5.54%) Power Platform
4 37 (5.54%) Serverless
5 36 (5.39%) Amazon S3
6 34 (5.09%) GCP
6 34 (5.09%) PaaS
7 32 (4.79%) IaaS
8 31 (4.64%) AWS Lambda
9 24 (3.59%) AWS CloudFormation
10 23 (3.44%) Azure Data Factory
11 20 (2.99%) Amazon EC2
11 20 (2.99%) Azure Logic Apps
12 19 (2.84%) SaaS
13 18 (2.69%) OpenShift
14 14 (2.10%) Amazon CloudWatch
14 14 (2.10%) Cloud Computing
14 14 (2.10%) Virtual Private Cloud
15 13 (1.95%) Power Automate
Communications & Networking
1 56 (8.38%) HTTP
2 33 (4.94%) TCP/IP
3 21 (3.14%) DNS
3 21 (3.14%) Internet
4 12 (1.80%) Firewall
4 12 (1.80%) FTP
5 10 (1.50%) Intranet
5 10 (1.50%) SNMP
6 8 (1.20%) Cisco IOS
6 8 (1.20%) IOS XR
6 8 (1.20%) IPv4
6 8 (1.20%) SSH
7 7 (1.05%) Ethernet VPN
7 7 (1.05%) F5 BIG-IP GTM
7 7 (1.05%) F5 BIG-IP LTM
7 7 (1.05%) HSRP
7 7 (1.05%) HTTPS
7 7 (1.05%) RTMP
7 7 (1.05%) SSL
7 7 (1.05%) VPLS
Database & Business Intelligence
1 109 (16.32%) SQL Server
2 89 (13.32%) Relational Database
3 65 (9.73%) NoSQL
4 52 (7.78%) Oracle Database
5 49 (7.34%) Data Warehouse
6 48 (7.19%) PostgreSQL
7 43 (6.44%) Data Lake
7 43 (6.44%) SQL Server Integration Services
8 38 (5.69%) MongoDB
9 36 (5.39%) Big Data
10 35 (5.24%) MySQL
11 33 (4.94%) Oracle Database 12c
12 32 (4.79%) Power BI
13 27 (4.04%) Tableau
14 24 (3.59%) RDBMS
15 23 (3.44%) Hadoop
16 22 (3.29%) Metadata
17 20 (2.99%) Parquet
18 15 (2.25%) SQL Server Reporting Services
18 15 (2.25%) Star Schema
Development Applications
1 192 (28.74%) Git (software)
2 171 (25.60%) Jenkins
3 94 (14.07%) JIRA
4 57 (8.53%) Maven
5 54 (8.08%) Visual Studio
6 46 (6.89%) Bitbucket
7 42 (6.29%) TeamCity
8 41 (6.14%) Subversion
9 40 (5.99%) Artifactory
10 38 (5.69%) JUnit
11 33 (4.94%) Oracle APEX
12 32 (4.79%) Robot Framework
13 26 (3.89%) CppUnit
13 26 (3.89%) Cucumber
14 24 (3.59%) Gradle
15 23 (3.44%) Selenium
16 22 (3.29%) Xcode
17 18 (2.69%) Postman
18 17 (2.54%) Android Studio
19 14 (2.10%) SonarQube
General
1 177 (26.50%) Finance
2 140 (20.96%) Social Skills
3 102 (15.27%) Banking
4 53 (7.93%) Analytical Skills
5 45 (6.74%) Investment Banking
6 28 (4.19%) Front Office
7 19 (2.84%) Presentation Skills
8 14 (2.10%) Documentation Skills
8 14 (2.10%) Retail
9 13 (1.95%) Back Office
10 11 (1.65%) Public Sector
11 10 (1.50%) Manufacturing
11 10 (1.50%) Marketing
11 10 (1.50%) Telecoms
12 9 (1.35%) Advertising
12 9 (1.35%) Retail Banking
13 7 (1.05%) Influencing Skills
14 6 (0.90%) Automotive
14 6 (0.90%) Inclusion and Diversity
15 5 (0.75%) Financial Institution
Job Titles
1 352 (52.69%) Developer
2 66 (9.88%) Architect
3 61 (9.13%) Java Developer
4 57 (8.53%) Senior Developer
5 42 (6.29%) Analyst
6 30 (4.49%) Data Engineer
7 28 (4.19%) C++ Developer
7 28 (4.19%) Full Stack Developer
8 26 (3.89%) DevOps Engineer
8 26 (3.89%) Investment Banking C++ Developer
8 26 (3.89%) Solutions Architect
9 23 (3.44%) Cloud Engineer
10 21 (3.14%) Front End Developer (Client-Side Developer)
10 21 (3.14%) iOS Developer
11 20 (2.99%) Android Developer
12 19 (2.84%) .NET Developer
12 19 (2.84%) Data Analyst
12 19 (2.84%) Front Office C++ Developer
12 19 (2.84%) Front Office Developer
12 19 (2.84%) Software Engineer
Libraries, Frameworks & Software Standards
1 330 (49.40%) XML
2 232 (34.73%) REST
3 156 (23.35%) HTML
4 140 (20.96%) Web Services
5 139 (20.81%) SOAP
6 123 (18.41%) CSS
7 121 (18.11%) .NET
8 116 (17.37%) RESTful
9 98 (14.67%) AngularJS
10 91 (13.62%) Spring
11 77 (11.53%) React
12 71 (10.63%) Node.js
13 59 (8.83%) Spring Boot
14 52 (7.78%) .NET Framework
15 51 (7.63%) HTML5
16 49 (7.34%) .NET Core
17 47 (7.04%) Kafka
18 46 (6.89%) YAML
19 36 (5.39%) jQuery
20 33 (4.94%) XSLT
Miscellaneous
1 33 (4.94%) User Experience
2 31 (4.64%) Mobile App
3 24 (3.59%) Data Structures
4 17 (2.54%) Reference Data
5 15 (2.25%) Cloud Native
6 14 (2.10%) Derivative
6 14 (2.10%) Private Cloud
7 12 (1.80%) Public Cloud
8 11 (1.65%) Client/Server
8 11 (1.65%) Data Centre
8 11 (1.65%) Management Information System
8 11 (1.65%) Self-Motivation
9 9 (1.35%) Enterprise Software
10 8 (1.20%) Foreign Exchange (FX)
10 8 (1.20%) Legacy Applications
11 7 (1.05%) Animation
11 7 (1.05%) Data Protection Act
11 7 (1.05%) iPhone
11 7 (1.05%) Taxonomies
12 6 (0.90%) Greenfield Project
Operating Systems
1 96 (14.37%) Windows
2 94 (14.07%) Linux
3 47 (7.04%) Unix
4 34 (5.09%) Android
5 27 (4.04%) Apple iOS
6 16 (2.40%) Windows Server
7 11 (1.65%) Red Hat Enterprise Linux
8 7 (1.05%) Mac OS
9 4 (0.60%) Mac OS X
9 4 (0.60%) Ubuntu
9 4 (0.60%) Windows Server 2012
10 3 (0.45%) Windows Server 2016
11 2 (0.30%) Windows 10
11 2 (0.30%) Windows Server 2008
11 2 (0.30%) Windows Server 2019
12 1 (0.15%) Windows 7
Processes & Methodologies
1 319 (47.75%) Agile Software Development
2 197 (29.49%) DevOps
3 142 (21.26%) Test Automation
4 133 (19.91%) Microservices
5 85 (12.72%) Scrum
6 82 (12.28%) TDD
7 80 (11.98%) Data Modelling
8 71 (10.63%) Problem-Solving
9 69 (10.33%) Analytics
10 68 (10.18%) Unit Testing
11 60 (8.98%) Software Engineering
12 58 (8.68%) Continuous Integration
12 58 (8.68%) Workflow
13 55 (8.23%) ETL
13 55 (8.23%) Multithreading
14 53 (7.93%) Business Intelligence
15 49 (7.34%) BDD
15 49 (7.34%) Migration
16 45 (6.74%) Full Stack Development
16 45 (6.74%) MVC
Programming Languages
1 231 (34.58%) SQL
2 230 (34.43%) Java
3 205 (30.69%) JavaScript
4 175 (26.20%) Python
5 143 (21.41%) C#
6 57 (8.53%) PowerShell
7 45 (6.74%) C++
8 37 (5.54%) Kotlin
9 32 (4.79%) T-SQL
10 31 (4.64%) PL/SQL
11 27 (4.04%) Apple Swift
11 27 (4.04%) Java 8
12 22 (3.29%) Shell Script
13 21 (3.14%) TypeScript
14 19 (2.84%) C
14 19 (2.84%) ES6
15 18 (2.69%) Scala
16 17 (2.54%) Ruby
17 16 (2.40%) Bash Shell
17 16 (2.40%) Objective-C
Qualifications
1 56 (8.38%) Degree
2 43 (6.44%) Security Cleared
3 39 (5.84%) SC Cleared
4 13 (1.95%) Computer Science Degree
4 13 (1.95%) Master's Degree
5 9 (1.35%) DV Cleared
6 8 (1.20%) Numerate Degree
7 7 (1.05%) CCIE
7 7 (1.05%) Cisco Certification
8 5 (0.75%) CCIE Service Provider
8 5 (0.75%) ISTQB
8 5 (0.75%) ITIL Certification
9 4 (0.60%) ISTQB Foundation Certification
10 3 (0.45%) BPSS Clearance
11 2 (0.30%) CCIE Security
12 1 (0.15%) DBS Check
12 1 (0.15%) ISEB
12 1 (0.15%) MCSA
12 1 (0.15%) MCSE
12 1 (0.15%) Microsoft Certification
Quality Assurance & Compliance
1 31 (4.64%) QA
2 16 (2.40%) Data Quality
3 10 (1.50%) Accessibility
4 5 (0.75%) WCAG
5 4 (0.60%) HL7
5 4 (0.60%) ISO 20022
6 3 (0.45%) ISO 15022
7 1 (0.15%) GDPR
7 1 (0.15%) ISO/IEC 27001
7 1 (0.15%) OASIS TOSCA
7 1 (0.15%) PCI DSS
7 1 (0.15%) PSD2
7 1 (0.15%) SNOMED CT
7 1 (0.15%) SOC 1
7 1 (0.15%) SOC 2
7 1 (0.15%) TARGET2
System Software
1 75 (11.23%) Docker
2 20 (2.99%) Active Directory
3 12 (1.80%) VMware Infrastructure
4 5 (0.75%) Virtual Desktop
4 5 (0.75%) Virtual Servers
4 5 (0.75%) vSphere
5 3 (0.45%) HDFS
6 2 (0.30%) KVM
6 2 (0.30%) LXC
7 1 (0.15%) Oracle RAC
7 1 (0.15%) Virtual Machines
7 1 (0.15%) VMware ESXi
Systems Management
1 64 (9.58%) Ansible
2 63 (9.43%) Kubernetes
3 36 (5.39%) Terraform
4 30 (4.49%) Puppet
5 26 (3.89%) BladeLogic
6 19 (2.84%) Opscode Chef
7 14 (2.10%) Kibana
8 12 (1.80%) logstash
9 9 (1.35%) Grafana
9 9 (1.35%) Nagios
10 6 (0.90%) Prometheus
11 5 (0.75%) Netcool
11 5 (0.75%) Single Sign-On
12 4 (0.60%) Istio
12 4 (0.60%) Marathon
12 4 (0.60%) Mesos
12 4 (0.60%) vCenter Server
13 3 (0.45%) CA Wily
13 3 (0.45%) Docker Swarm
13 3 (0.45%) HP SiteScope
Vendors
1 117 (17.51%) Oracle
2 77 (11.53%) Microsoft
3 32 (4.79%) Salesforce.com
4 26 (3.89%) FIS
4 26 (3.89%) SunGard
5 25 (3.74%) Google
5 25 (3.74%) Splunk
6 24 (3.59%) VMware
7 23 (3.44%) Databricks
8 21 (3.14%) New Relic
9 19 (2.84%) AppDynamics
10 18 (2.69%) IBM
10 18 (2.69%) MuleSoft
11 15 (2.25%) Informatica
12 14 (2.10%) Cisco
13 13 (1.95%) ServiceNow
14 12 (1.80%) SAP
15 10 (1.50%) Adobe
15 10 (1.50%) Red Hat
15 10 (1.50%) SolarWinds