Period
to 28 January 2022

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 28 January 2022 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
28 Jan 2022
Same period 2021 Same period 2020
Rank 116 98 130
Rank change year-on-year -18 +32 -21
Contract jobs citing JSON 73 35 76
As % of all contract jobs advertised in the City of London 1.82% 1.66% 1.55%
As % of the Libraries, Frameworks & Software Standards category 5.75% 5.34% 4.59%
Number of daily rates quoted 41 28 61
10th Percentile £413 £264 £313
25th Percentile £513 £425 £363
Median daily rate (50th Percentile) £575 £525 £495
Median % change year-on-year +9.52% +6.06% -3.41%
75th Percentile £638 £614 £588
90th Percentile £750 £653 £688
Central London median daily rate £575 £525 £498
% change year-on-year +9.52% +5.53% -0.50%
Number of hourly rates quoted 0 0 1
10th Percentile - - -
25th Percentile - - £61.67
Median hourly rate - - £63.33
75th Percentile - - £65.00
90th Percentile - - -
Central London median hourly rate - - £63.33

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 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 1,270 656 1,654
As % of all contract IT jobs advertised in the City of London 31.64% 31.03% 33.76%
Number of daily rates quoted 1,011 507 1,364
10th Percentile £413 £363 £388
25th Percentile £497 £425 £450
Median daily rate (50th Percentile) £575 £550 £525
Median % change year-on-year +4.55% +4.76% -
75th Percentile £688 £614 £613
90th Percentile £760 £688 £688
Central London median daily rate £575 £545 £525
% change year-on-year +5.50% +3.81% -
Number of hourly rates quoted 2 1 2
10th Percentile £18.23 - £49.82
25th Percentile £26.06 £17.50 £51.79
Median hourly rate £39.75 £20.00 £57.67
Median % change year-on-year +98.75% -65.32% +249.48%
75th Percentile £54.06 £22.50 £62.62
90th Percentile £62.28 - £64.05
Central London median hourly rate £39.75 £20.00 £60.00
% change year-on-year +98.75% -66.67% +263.64%

JSON
Job Vacancy Trend in the City of London

Job postings citing JSON as a proportion 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

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

Daily rate trend for JSON in the City of London

JSON
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing JSON in the City of London over the 6 months to 28 January 2022.

Daily rate histogram for JSON in the City of London

JSON
Contractor Hourly Rate Trend in the City of London

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

Hourly rate trend for JSON in the City of London

For the 6 months to 28 January 2022, 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 40 (54.79%) XML
2 26 (35.62%) SQL
3 25 (34.25%) Agile Software Development
4 24 (32.88%) JavaScript
5 21 (28.77%) HTML
5 21 (28.77%) Java
5 21 (28.77%) CI/CD
6 20 (27.40%) C#
6 20 (27.40%) Finance
7 19 (26.03%) CSS
7 19 (26.03%) Git (software)
8 18 (24.66%) Jenkins
8 18 (24.66%) DevOps
9 15 (20.55%) Microservices
9 15 (20.55%) Problem-Solving
9 15 (20.55%) Azure
9 15 (20.55%) NoSQL
9 15 (20.55%) JIRA
9 15 (20.55%) Python
10 13 (17.81%) ETL
10 13 (17.81%) AWS
11 12 (16.44%) REST
11 12 (16.44%) GitHub
11 12 (16.44%) Data Modelling
11 12 (16.44%) Social Skills
12 11 (15.07%) SDLC
12 11 (15.07%) Docker
12 11 (15.07%) Kafka
13 10 (13.70%) Sass
13 10 (13.70%) TDD

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 8 (10.96%) CMS
2 7 (9.59%) Apache Spark
3 4 (5.48%) Confluence
3 4 (5.48%) Headless CMS
3 4 (5.48%) Magnolia
4 2 (2.74%) IIS
5 1 (1.37%) Apache
5 1 (1.37%) Elasticsearch
5 1 (1.37%) Jetty
5 1 (1.37%) Oracle Workflow
5 1 (1.37%) Sitecore CMS
5 1 (1.37%) WebSphere
Applications
1 5 (6.85%) Microsoft Excel
1 5 (6.85%) Microsoft PowerPoint
2 1 (1.37%) Chatbot
Business Applications
1 2 (2.74%) Salesforce.com CRM
2 1 (1.37%) Sparx Enterprise Architect
Cloud Services
1 15 (20.55%) Azure
2 13 (17.81%) AWS
3 12 (16.44%) GitHub
4 8 (10.96%) Amazon S3
5 5 (6.85%) OpenShift
5 5 (6.85%) Snowflake
6 4 (5.48%) PaaS
7 2 (2.74%) AWS CloudFormation
7 2 (2.74%) AWS Lambda
7 2 (2.74%) Azure Active Directory
7 2 (2.74%) Azure Monitor
7 2 (2.74%) Force.com
7 2 (2.74%) IaaS
7 2 (2.74%) Serverless
8 1 (1.37%) AWS Step Functions
8 1 (1.37%) Azure Stack
8 1 (1.37%) Azure Storage
8 1 (1.37%) Collibra
8 1 (1.37%) Salesforce Einstein
8 1 (1.37%) Salesforce Service Cloud
Communications & Networking
1 5 (6.85%) HTTP
2 2 (2.74%) SAN
3 1 (1.37%) Firewall
3 1 (1.37%) Internet
3 1 (1.37%) Network Security
3 1 (1.37%) Radio Access Network
3 1 (1.37%) SD-WAN
3 1 (1.37%) SNMP
3 1 (1.37%) SSH
3 1 (1.37%) TCP/IP
Database & Business Intelligence
1 15 (20.55%) NoSQL
2 9 (12.33%) SQL Server
3 8 (10.96%) MongoDB
3 8 (10.96%) Parquet
3 8 (10.96%) Relational Database
4 7 (9.59%) Big Data
4 7 (9.59%) RDBMS
5 6 (8.22%) Data Vault
6 5 (6.85%) SQL Server Integration Services
6 5 (6.85%) Tableau
7 4 (5.48%) MySQL
8 3 (4.11%) Data Lake
8 3 (4.11%) Data Warehouse
8 3 (4.11%) Oracle Database
9 2 (2.74%) Amazon DynamoDB
10 1 (1.37%) Data Mart
10 1 (1.37%) Hazelcast
10 1 (1.37%) PostgreSQL
10 1 (1.37%) Redis
10 1 (1.37%) Star Schema
Development Applications
1 19 (26.03%) Git (software)
2 18 (24.66%) Jenkins
3 15 (20.55%) JIRA
4 7 (9.59%) Visual Studio
5 6 (8.22%) Cucumber
6 5 (6.85%) JUnit
6 5 (6.85%) Maven
6 5 (6.85%) Octopus Deploy
7 4 (5.48%) Gatling
7 4 (5.48%) JMeter
7 4 (5.48%) REST Assured
8 2 (2.74%) AppScan
8 2 (2.74%) Burp Suite
8 2 (2.74%) Postman
8 2 (2.74%) Selenium
9 1 (1.37%) Moq
9 1 (1.37%) Robot Framework
9 1 (1.37%) SonarQube
9 1 (1.37%) Team Foundation Server
9 1 (1.37%) Terragrunt
General
1 20 (27.40%) Finance
2 12 (16.44%) Social Skills
3 9 (12.33%) Analytical Skills
4 6 (8.22%) Banking
5 5 (6.85%) Front Office
6 4 (5.48%) Investment Banking
7 3 (4.11%) Advertising
7 3 (4.11%) Marketing
8 2 (2.74%) Automotive
9 1 (1.37%) Inclusion and Diversity
9 1 (1.37%) Military
9 1 (1.37%) Music Industry
9 1 (1.37%) Police
9 1 (1.37%) Presentation Skills
9 1 (1.37%) Retail Banking
Job Titles
1 46 (63.01%) Developer
2 11 (15.07%) Architect
3 7 (9.59%) Angular Developer
4 6 (8.22%) Salesforce Developer
4 6 (8.22%) SQL Developer
4 6 (8.22%) Talend Developer
5 4 (5.48%) C# Developer
5 4 (5.48%) Cloud Engineer
5 4 (5.48%) Software Developer
5 4 (5.48%) Software Tester
5 4 (5.48%) Solutions Architect
5 4 (5.48%) Tester
6 3 (4.11%) .NET Developer
6 3 (4.11%) Analyst
6 3 (4.11%) Azure Engineer
6 3 (4.11%) C# .NET Developer
6 3 (4.11%) Cloud Developer
6 3 (4.11%) CMS Developer
7 2 (2.74%) JavaScript Developer
7 2 (2.74%) Python Developer
Libraries, Frameworks & Software Standards
1 40 (54.79%) XML
2 21 (28.77%) HTML
3 19 (26.03%) CSS
4 12 (16.44%) REST
5 11 (15.07%) Kafka
6 10 (13.70%) Sass
7 9 (12.33%) .NET
8 8 (10.96%) AngularJS
8 8 (10.96%) React
8 8 (10.96%) RESTful
8 8 (10.96%) SOAP
8 8 (10.96%) Spring
8 8 (10.96%) Web Services
9 7 (9.59%) Apache Avro
9 7 (9.59%) Node.js
10 5 (6.85%) YAML
11 4 (5.48%) jQuery
11 4 (5.48%) JSR 170
11 4 (5.48%) Spring Boot
12 3 (4.11%) Swagger
Miscellaneous
1 4 (5.48%) Public Cloud
2 3 (4.11%) Enterprise Software
2 3 (4.11%) Greenfield Project
3 2 (2.74%) Equities
3 2 (2.74%) Management Information System
3 2 (2.74%) Mobile App
4 1 (1.37%) Cloud Native
4 1 (1.37%) Data Structures
4 1 (1.37%) Foreign Exchange (FX)
4 1 (1.37%) Hybrid Cloud
4 1 (1.37%) Reference Data
4 1 (1.37%) Self-Motivation
4 1 (1.37%) SWIFT
Operating Systems
1 3 (4.11%) Windows
2 2 (2.74%) Android
2 2 (2.74%) Linux
2 2 (2.74%) Unix
2 2 (2.74%) Windows Server
Processes & Methodologies
1 25 (34.25%) Agile Software Development
2 21 (28.77%) CI/CD
3 18 (24.66%) DevOps
4 15 (20.55%) Microservices
4 15 (20.55%) Problem-Solving
5 13 (17.81%) ETL
6 12 (16.44%) Data Modelling
7 11 (15.07%) SDLC
8 10 (13.70%) TDD
9 9 (12.33%) BDD
9 9 (12.33%) Full Stack Development
10 8 (10.96%) Scrum
11 7 (9.59%) Business Intelligence
11 7 (9.59%) Configuration Management
11 7 (9.59%) Data Integration
11 7 (9.59%) Dependency Management
11 7 (9.59%) Micro Frontends
11 7 (9.59%) Pair Programming
11 7 (9.59%) User Acceptance Testing
11 7 (9.59%) Workflow
Programming Languages
1 26 (35.62%) SQL
2 24 (32.88%) JavaScript
3 21 (28.77%) Java
4 20 (27.40%) C#
5 15 (20.55%) Python
6 6 (8.22%) T-SQL
7 5 (6.85%) PowerShell
7 5 (6.85%) VBA
8 4 (5.48%) Groovy
8 4 (5.48%) Java 8
9 3 (4.11%) Scala
9 3 (4.11%) SOQL
9 3 (4.11%) SOSL
10 2 (2.74%) Apex Code
10 2 (2.74%) Formula Language
10 2 (2.74%) Go
10 2 (2.74%) PHP
10 2 (2.74%) VB
11 1 (1.37%) ES6
11 1 (1.37%) Perl
Qualifications
1 9 (12.33%) SC Cleared
1 9 (12.33%) Security Cleared
2 2 (2.74%) CEH
2 2 (2.74%) CISSP
2 2 (2.74%) CSSLP
2 2 (2.74%) Degree
2 2 (2.74%) GIAC
3 1 (1.37%) Computer Science Degree
3 1 (1.37%) Master's Degree
Quality Assurance & Compliance
1 7 (9.59%) QA
2 6 (8.22%) Data Quality
3 2 (2.74%) Accessibility
3 2 (2.74%) Actionable Recommendations
3 2 (2.74%) GDPR
3 2 (2.74%) WCAG
System Software
1 11 (15.07%) Docker
2 3 (4.11%) Virtual Machines
3 2 (2.74%) Active Directory
4 1 (1.37%) VMware Infrastructure
Systems Management
1 6 (8.22%) Ansible
1 6 (8.22%) Kubernetes
2 5 (6.85%) Kibana
2 5 (6.85%) Terraform
3 4 (5.48%) Marathon
3 4 (5.48%) Mesos
4 2 (2.74%) HP Fortify
4 2 (2.74%) Nessus
4 2 (2.74%) Puppet
4 2 (2.74%) WebInspect
5 1 (1.37%) Grafana
5 1 (1.37%) Netcool
5 1 (1.37%) Packer
Vendors
1 9 (12.33%) Microsoft
2 7 (9.59%) Salesforce.com
3 6 (8.22%) Cloudera
3 6 (8.22%) Talend
4 5 (6.85%) Alteryx
4 5 (6.85%) Oracle
5 4 (5.48%) MuleSoft
5 4 (5.48%) New Relic
6 2 (2.74%) Checkmarx
6 2 (2.74%) Databricks
6 2 (2.74%) HP
6 2 (2.74%) IBM
6 2 (2.74%) Qualys
6 2 (2.74%) Splunk
7 1 (1.37%) CheckPoint
7 1 (1.37%) Murex
7 1 (1.37%) Sitecore
7 1 (1.37%) Sybase
7 1 (1.37%) Verint
7 1 (1.37%) VMware