Period
to 30 July 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 30 July 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
30 Jul 2021
Same period 2020 Same period 2019
Rank 148 168 107
Rank change year-on-year +20 -61 +8
Contract jobs citing JSON 576 261 1,013
As % of all contract jobs advertised in London 1.90% 1.65% 2.51%
As % of the Libraries, Frameworks & Software Standards category 5.36% 4.33% 6.85%
Number of daily rates quoted 407 154 657
10th Percentile £398 £366 £400
25th Percentile £463 £428 £450
Median daily rate (50th Percentile) £500 £500 £523
Median % change year-on-year - -4.31% +7.18%
75th Percentile £625 £575 £588
90th Percentile £718 £623 £675
England median daily rate £500 £500 £500
Number of hourly rates quoted 5 1 7
10th Percentile £32.70 " £16.15
25th Percentile £42.75 £48.00 £64.38
Median hourly rate £65.00 £51.00 £115.00
Median % change year-on-year +27.45% -55.65% -
75th Percentile £68.00 £54.00 £122.50
90th Percentile £75.20 " "
England median hourly rate £59.00 £56.50 £60.00
% change year-on-year +4.42% -5.83% +33.33%

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 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 10,741 6,027 14,797
As % of all contract IT jobs advertised in London 35.47% 38.11% 36.73%
Number of daily rates quoted 7,992 4,482 11,146
10th Percentile £400 £375 £375
25th Percentile £463 £450 £450
Median daily rate (50th Percentile) £550 £525 £525
Median % change year-on-year +4.76% - +2.44%
75th Percentile £650 £638 £603
90th Percentile £720 £713 £675
England median daily rate £525 £500 £500
% change year-on-year +5.00% - +5.26%
Number of hourly rates quoted 41 36 60
10th Percentile £21.25 £23.00 £13.28
25th Percentile £35.00 £31.15 £33.81
Median hourly rate £49.00 £46.75 £49.57
Median % change year-on-year +4.81% -5.68% +16.62%
75th Percentile £65.00 £63.00 £55.00
90th Percentile £68.86 £67.52 £68.88
England median hourly rate £47.25 £45.00 £45.00
% change year-on-year +5.00% - +8.39%

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 30 July 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 30 July 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 30 July 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 -9 45 £504 -8.32% 45
East London +17 19 £480 +1.05% 16
West London -3 5 £500 +8.11% 22
South London +12 4 £500 -7.41% 6
JSON
England

For the 6 months to 30 July 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.

1 262 (45.49%) XML
2 253 (43.92%) Agile Software Development
3 208 (36.11%) SQL
4 205 (35.59%) REST
5 201 (34.90%) Java
6 180 (31.25%) Git (software)
7 169 (29.34%) JavaScript
8 159 (27.60%) Azure
9 158 (27.43%) Jenkins
10 155 (26.91%) Finance
11 146 (25.35%) Python
12 144 (25.00%) HTML
13 137 (23.78%) DevOps
14 131 (22.74%) Web Services
15 127 (22.05%) AWS
16 124 (21.53%) SOAP
17 120 (20.83%) Social Skills
18 110 (19.10%) Test Automation
19 109 (18.92%) RESTful
20 108 (18.75%) C#
20 108 (18.75%) CSS
21 103 (17.88%) .NET
22 93 (16.15%) Oracle
22 93 (16.15%) Microservices
23 91 (15.80%) SQL Server
24 89 (15.45%) GitHub
25 87 (15.10%) Linux
26 86 (14.93%) Windows
27 81 (14.06%) React
28 77 (13.37%) JIRA

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 38 (6.60%) Confluence
2 29 (5.03%) Apache Spark
3 24 (4.17%) Apache
4 18 (3.13%) Tomcat
5 17 (2.95%) Elasticsearch
6 15 (2.60%) CMS
7 9 (1.56%) Apache Airflow
8 8 (1.39%) IIS
8 8 (1.39%) JBoss
8 8 (1.39%) SharePoint
8 8 (1.39%) WebLogic
9 7 (1.22%) Luigi
9 7 (1.22%) WebSphere
10 6 (1.04%) Adobe Experience Manager
10 6 (1.04%) Headless CMS
10 6 (1.04%) nginx
11 5 (0.87%) BizTalk Server
11 5 (0.87%) Oracle Workflow
12 4 (0.69%) Mule
12 4 (0.69%) Oracle SOA Suite
Applications
1 13 (2.26%) Chatbot
2 11 (1.91%) Microsoft Excel
3 8 (1.39%) Microsoft Office
4 7 (1.22%) Photoshop
5 6 (1.04%) MS Visio
6 4 (0.69%) Microsoft PowerPoint
6 4 (0.69%) Microsoft Project
7 2 (0.35%) Mingle
8 1 (0.17%) Adobe XD
Business Applications
1 16 (2.78%) SunGard Martini
2 8 (1.39%) Sparx Enterprise Architect
3 3 (0.52%) Dynamics CRM
3 3 (0.52%) Oracle ERP
4 2 (0.35%) Distributed Ledger
4 2 (0.35%) SAP CRM
5 1 (0.17%) BusinessWorks
5 1 (0.17%) Endur
5 1 (0.17%) Magento
5 1 (0.17%) Oracle Cash Management
5 1 (0.17%) Summit
5 1 (0.17%) Tesseract
5 1 (0.17%) Workday HCM
Cloud Services
1 159 (27.60%) Azure
2 127 (22.05%) AWS
3 89 (15.45%) GitHub
4 45 (7.81%) GCP
5 37 (6.42%) Amazon S3
6 35 (6.08%) IaaS
7 33 (5.73%) PaaS
8 31 (5.38%) AWS Lambda
9 30 (5.21%) Serverless
10 29 (5.03%) Power Platform
11 24 (4.17%) Amazon EC2
12 22 (3.82%) Azure Data Factory
13 21 (3.65%) AWS CloudFormation
14 20 (3.47%) Azure Logic Apps
14 20 (3.47%) SaaS
15 18 (3.13%) Cloud Computing
16 17 (2.95%) Amazon CloudWatch
17 16 (2.78%) Virtual Private Cloud
18 15 (2.60%) Google Analytics
19 14 (2.43%) Snowflake
Communications & Networking
1 46 (7.99%) HTTP
2 23 (3.99%) TCP/IP
3 20 (3.47%) DNS
4 18 (3.13%) Internet
5 12 (2.08%) HTTPS
6 11 (1.91%) Firewall
6 11 (1.91%) FTP
7 8 (1.39%) RTMP
7 8 (1.39%) SSL
8 7 (1.22%) DHCP
8 7 (1.22%) SSH
9 5 (0.87%) LAN
9 5 (0.87%) PuTTY
9 5 (0.87%) SMTP
9 5 (0.87%) Telnet
9 5 (0.87%) WAN
9 5 (0.87%) WinSCP
10 4 (0.69%) SAN
10 4 (0.69%) Software-Defined Networking
11 3 (0.52%) 2G
Database & Business Intelligence
1 91 (15.80%) SQL Server
2 68 (11.81%) Relational Database
3 41 (7.12%) NoSQL
4 38 (6.60%) Data Warehouse
4 38 (6.60%) PostgreSQL
5 37 (6.42%) Oracle Database
6 34 (5.90%) Big Data
6 34 (5.90%) SQL Server Integration Services
7 29 (5.03%) MySQL
8 26 (4.51%) MongoDB
8 26 (4.51%) Oracle Database 12c
8 26 (4.51%) RDBMS
9 23 (3.99%) Power BI
10 22 (3.82%) Hadoop
11 17 (2.95%) Amazon RDS
11 17 (2.95%) Data Lake
11 17 (2.95%) Tableau
12 14 (2.43%) Apache Hive
12 14 (2.43%) Star Schema
13 13 (2.26%) Metadata
Development Applications
1 180 (31.25%) Git (software)
2 158 (27.43%) Jenkins
3 77 (13.37%) JIRA
4 49 (8.51%) Maven
5 46 (7.99%) JUnit
6 40 (6.94%) Visual Studio
7 33 (5.73%) Artifactory
7 33 (5.73%) TeamCity
8 28 (4.86%) Bitbucket
9 25 (4.34%) Subversion
10 24 (4.17%) Gradle
10 24 (4.17%) Oracle APEX
11 19 (3.30%) Xcode
12 16 (2.78%) CppUnit
12 16 (2.78%) Cucumber
12 16 (2.78%) Robot Framework
13 15 (2.60%) webpack
14 14 (2.43%) Selenium
14 14 (2.43%) Sonatype Nexus
15 13 (2.26%) Calabash
General
1 155 (26.91%) Finance
2 120 (20.83%) Social Skills
3 76 (13.19%) Banking
4 34 (5.90%) Analytical Skills
5 28 (4.86%) Investment Banking
6 19 (3.30%) Documentation Skills
7 18 (3.13%) Front Office
8 16 (2.78%) Manufacturing
8 16 (2.78%) Telecoms
9 13 (2.26%) Marketing
9 13 (2.26%) Public Sector
10 11 (1.91%) Back Office
10 11 (1.91%) Retail
11 10 (1.74%) Presentation Skills
12 8 (1.39%) Electronics
12 8 (1.39%) Influencing Skills
13 7 (1.22%) Legal
14 5 (0.87%) Advertising
14 5 (0.87%) Retail Banking
15 4 (0.69%) Publishing
Job Titles
1 279 (48.44%) Developer
2 60 (10.42%) Architect
3 46 (7.99%) Senior Developer
4 43 (7.47%) Java Developer
5 40 (6.94%) Analyst
6 30 (5.21%) DevOps Engineer
7 24 (4.17%) Data Engineer
7 24 (4.17%) iOS Developer
8 23 (3.99%) Full Stack Developer
9 21 (3.65%) Android Developer
10 20 (3.47%) Cloud Engineer
10 20 (3.47%) Front End Developer (Client-Side Developer)
11 19 (3.30%) AWS Engineer
11 19 (3.30%) Solutions Architect
12 18 (3.13%) .NET Developer
12 18 (3.13%) C++ Developer
12 18 (3.13%) Software Engineer
13 17 (2.95%) Azure Developer
14 16 (2.78%) Azure Engineer
14 16 (2.78%) Data Analyst
Libraries, Frameworks & Software Standards
1 262 (45.49%) XML
2 205 (35.59%) REST
3 144 (25.00%) HTML
4 131 (22.74%) Web Services
5 124 (21.53%) SOAP
6 109 (18.92%) RESTful
7 108 (18.75%) CSS
8 103 (17.88%) .NET
9 81 (14.06%) React
10 72 (12.50%) Spring
11 63 (10.94%) Node.js
12 60 (10.42%) AngularJS
13 56 (9.72%) HTML5
14 50 (8.68%) YAML
15 44 (7.64%) Spring Boot
16 42 (7.29%) Kafka
17 40 (6.94%) jQuery
18 38 (6.60%) .NET Core
19 37 (6.42%) .NET Framework
20 30 (5.21%) CSS3
Miscellaneous
1 48 (8.33%) User Experience
2 25 (4.34%) Mobile App
3 16 (2.78%) Reference Data
4 14 (2.43%) Client/Server
5 12 (2.08%) Animation
5 12 (2.08%) Data Structures
5 12 (2.08%) Enterprise Software
5 12 (2.08%) Public Cloud
6 11 (1.91%) Cloud Native
7 10 (1.74%) Data Centre
7 10 (1.74%) iPhone
7 10 (1.74%) Management Information System
8 9 (1.56%) Legacy Applications
9 8 (1.39%) Derivative
10 7 (1.22%) Equities
10 7 (1.22%) W3C
11 6 (1.04%) Distributed Denial-of-Service
11 6 (1.04%) Graphic Design
12 5 (0.87%) Foreign Exchange (FX)
12 5 (0.87%) Wiki
Operating Systems
1 87 (15.10%) Linux
2 86 (14.93%) Windows
3 37 (6.42%) Unix
4 34 (5.90%) Apple iOS
5 30 (5.21%) Android
6 13 (2.26%) Windows Server
7 10 (1.74%) Mac OS
8 7 (1.22%) Red Hat Enterprise Linux
9 5 (0.87%) Ubuntu
10 3 (0.52%) Mac OS X
10 3 (0.52%) Windows Server 2012
10 3 (0.52%) Windows Server 2016
11 2 (0.35%) CentOS
11 2 (0.35%) Windows 10
11 2 (0.35%) Windows Server 2019
12 1 (0.17%) Solaris
12 1 (0.17%) Tizen
12 1 (0.17%) webOS
12 1 (0.17%) Windows 7
12 1 (0.17%) Windows Server 2008
Processes & Methodologies
1 253 (43.92%) Agile Software Development
2 137 (23.78%) DevOps
3 110 (19.10%) Test Automation
4 93 (16.15%) Microservices
5 76 (13.19%) TDD
6 65 (11.28%) Scrum
7 61 (10.59%) Data Modelling
8 59 (10.24%) Continuous Integration
9 54 (9.38%) MVC
9 54 (9.38%) Unit Testing
10 53 (9.20%) Analytics
11 51 (8.85%) Migration
12 49 (8.51%) Multithreading
13 48 (8.33%) Front End Development
14 46 (7.99%) Workflow
15 45 (7.81%) Business Intelligence
16 43 (7.47%) Software Engineering
17 41 (7.12%) Full Stack Development
18 40 (6.94%) Problem-Solving
19 39 (6.77%) ETL
Programming Languages
1 208 (36.11%) SQL
2 201 (34.90%) Java
3 169 (29.34%) JavaScript
4 146 (25.35%) Python
5 108 (18.75%) C#
6 60 (10.42%) PowerShell
7 39 (6.77%) C++
8 27 (4.69%) Apple Swift
9 26 (4.51%) Java 8
9 26 (4.51%) Kotlin
9 26 (4.51%) PL/SQL
10 23 (3.99%) Objective-C
11 21 (3.65%) Scala
12 20 (3.47%) TypeScript
13 18 (3.13%) Bash Shell
13 18 (3.13%) T-SQL
14 17 (2.95%) Shell Script
15 15 (2.60%) C
15 15 (2.60%) ES6
15 15 (2.60%) PHP
Qualifications
1 49 (8.51%) Security Cleared
2 45 (7.81%) SC Cleared
3 42 (7.29%) Degree
4 10 (1.74%) Computer Science Degree
5 8 (1.39%) Numerate Degree
6 6 (1.04%) Master's Degree
7 5 (0.87%) ISTQB
7 5 (0.87%) ITIL Certification
8 4 (0.69%) AWS Certification
8 4 (0.69%) ISTQB Foundation Certification
9 2 (0.35%) BPSS Clearance
9 2 (0.35%) DV Cleared
10 1 (0.17%) CITP
10 1 (0.17%) ISEB
Quality Assurance & Compliance
1 36 (6.25%) QA
2 12 (2.08%) Accessibility
3 11 (1.91%) Data Quality
4 4 (0.69%) HL7
5 3 (0.52%) OASIS TOSCA
6 2 (0.35%) Actionable Recommendations
7 1 (0.17%) GDPR
7 1 (0.17%) ISO 20022
7 1 (0.17%) ISO/IEC 27001
7 1 (0.17%) PCI DSS
7 1 (0.17%) PSD2
7 1 (0.17%) SNOMED CT
7 1 (0.17%) SOC 1
7 1 (0.17%) SOC 2
7 1 (0.17%) TARGET2
7 1 (0.17%) WCAG
System Software
1 60 (10.42%) Docker
2 13 (2.26%) VMware Infrastructure
3 8 (1.39%) Active Directory
4 5 (0.87%) HDFS
4 5 (0.87%) Virtual Servers
5 4 (0.69%) Virtual Desktop
6 3 (0.52%) KVM
6 3 (0.52%) LXC
6 3 (0.52%) Virtual Machines
6 3 (0.52%) VMware ESXi
7 1 (0.17%) vSphere
Systems Management
1 50 (8.68%) Ansible
2 48 (8.33%) Kubernetes
3 30 (5.21%) Puppet
4 27 (4.69%) Terraform
5 25 (4.34%) Opscode Chef
6 16 (2.78%) BladeLogic
7 8 (1.39%) Nagios
8 6 (1.04%) Grafana
8 6 (1.04%) Istio
9 5 (0.87%) Docker Swarm
10 4 (0.69%) logstash
10 4 (0.69%) Prometheus
11 3 (0.52%) Cloudify
11 3 (0.52%) Juju
11 3 (0.52%) Single Sign-On
12 2 (0.35%) Forum Sentry
13 1 (0.17%) Active Directory Federation Services
13 1 (0.17%) HP ALM
13 1 (0.17%) PingFederate
13 1 (0.17%) Rancher
Vendors
1 93 (16.15%) Oracle
2 54 (9.38%) Microsoft
3 31 (5.38%) Google
4 26 (4.51%) VMware
5 23 (3.99%) Salesforce.com
6 20 (3.47%) SAP
7 16 (2.78%) FIS
7 16 (2.78%) SunGard
8 15 (2.60%) IBM
9 14 (2.43%) New Relic
9 14 (2.43%) Red Hat
10 13 (2.26%) Adobe
10 13 (2.26%) MuleSoft
10 13 (2.26%) SolarWinds
10 13 (2.26%) Splunk
11 12 (2.08%) Informatica
12 11 (1.91%) ServiceNow
13 10 (1.74%) CA Agile Central
13 10 (1.74%) Databricks
14 9 (1.56%) AppDynamics