Period
to 18 October 2021

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 18 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
Central London > City of London
6 months to
18 Oct 2021
Same period 2020 Same period 2019
Rank 123 99 115
Rank change year-on-year -24 +16 -7
Contract jobs citing JSON 59 22 116
As % of all contract jobs advertised in the City of London 1.53% 1.24% 1.94%
As % of the Libraries, Frameworks & Software Standards category 4.56% 4.16% 5.45%
Number of daily rates quoted 25 17 92
10th Percentile £383 £447 £363
25th Percentile £463 £463 £463
Median daily rate (50th Percentile) £575 £525 £550
Median % change year-on-year +9.52% -4.55% +10.00%
75th Percentile £638 £588 £638
90th Percentile £720 £693 £775
Central London median daily rate £575 £525 £525
% change year-on-year +9.52% - +5.00%
Number of hourly rates quoted 0 0 2
Median hourly rate - - £42.42
Central London median hourly rate - - £42.42

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 1,293 529 2,130
As % of all contract IT jobs advertised in the City of London 33.51% 29.85% 35.68%
Number of daily rates quoted 995 421 1,740
10th Percentile £413 £363 £406
25th Percentile £483 £425 £463
Median daily rate (50th Percentile) £600 £525 £535
Median % change year-on-year +14.29% -1.91% +1.95%
75th Percentile £675 £613 £618
90th Percentile £750 £688 £688
Central London median daily rate £590 £525 £525
% change year-on-year +12.38% - -
Number of hourly rates quoted 8 4 6
10th Percentile £18.78 £26.28 £31.06
25th Percentile £24.25 £30.44 £41.23
Median hourly rate £35.75 £35.50 £46.85
Median % change year-on-year +0.70% -24.22% +73.51%
75th Percentile £45.25 £38.69 £53.91
90th Percentile £68.43 £39.48 £60.25
Central London median hourly rate £35.00 £35.50 £46.85
% change year-on-year -1.41% -24.22% +73.51%

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 18 October 2021.

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 18 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 City of London region with a requirement for JSON.

1 30 (50.85%) XML
2 27 (45.76%) Java
3 25 (42.37%) Agile Software Development
4 22 (37.29%) SQL
5 20 (33.90%) DevOps
6 18 (30.51%) Finance
7 16 (27.12%) JavaScript
7 16 (27.12%) Azure
8 15 (25.42%) Git (software)
8 15 (25.42%) Microservices
8 15 (25.42%) GitHub
8 15 (25.42%) Python
9 14 (23.73%) C#
10 13 (22.03%) HTML
10 13 (22.03%) CSS
10 13 (22.03%) Jenkins
10 13 (22.03%) Problem-Solving
11 11 (18.64%) RESTful
11 11 (18.64%) Spring
12 10 (16.95%) Web Services
12 10 (16.95%) SQL Server
12 10 (16.95%) NoSQL
12 10 (16.95%) Docker
13 9 (15.25%) REST
13 9 (15.25%) ETL
14 8 (13.56%) Data Modelling
14 8 (13.56%) JUnit
14 8 (13.56%) Maven
14 8 (13.56%) SQL Server Integration Services
14 8 (13.56%) 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 7 (11.86%) CMS
2 5 (8.47%) Confluence
3 4 (6.78%) Headless CMS
3 4 (6.78%) Magnolia
4 3 (5.08%) Apache
4 3 (5.08%) Apache Spark
4 3 (5.08%) Elasticsearch
5 1 (1.69%) JBoss
5 1 (1.69%) Sitecore CMS
5 1 (1.69%) WebSphere
Applications
1 6 (10.17%) Microsoft Excel
1 6 (10.17%) Microsoft PowerPoint
2 1 (1.69%) Chatbot
Cloud Services
1 16 (27.12%) Azure
2 15 (25.42%) GitHub
3 7 (11.86%) AWS
4 6 (10.17%) Snowflake
5 3 (5.08%) IaaS
5 3 (5.08%) OpenShift
6 2 (3.39%) Azure Active Directory
6 2 (3.39%) Azure Data Factory
6 2 (3.39%) PaaS
7 1 (1.69%) Amazon S3
7 1 (1.69%) AWS CloudFormation
7 1 (1.69%) AWS Lambda
7 1 (1.69%) AWS Step Functions
7 1 (1.69%) Collibra
7 1 (1.69%) GCP
7 1 (1.69%) IBM Cloud
7 1 (1.69%) Salesforce Sales Cloud
7 1 (1.69%) Salesforce Service Cloud
7 1 (1.69%) Serverless
7 1 (1.69%) Slack
Communications & Networking
1 4 (6.78%) HTTP
2 2 (3.39%) Internet
3 1 (1.69%) Radio Access Network
3 1 (1.69%) SNMP
3 1 (1.69%) SSH
3 1 (1.69%) TCP/IP
Database & Business Intelligence
1 10 (16.95%) NoSQL
1 10 (16.95%) SQL Server
2 8 (13.56%) SQL Server Integration Services
3 6 (10.17%) Tableau
4 4 (6.78%) Data Warehouse
4 4 (6.78%) MySQL
5 3 (5.08%) Big Data
5 3 (5.08%) Data Lake
5 3 (5.08%) Hadoop
5 3 (5.08%) Oracle Database
6 2 (3.39%) Apache Hive
6 2 (3.39%) MongoDB
6 2 (3.39%) Parquet
7 1 (1.69%) Amazon DynamoDB
7 1 (1.69%) Amazon Redshift
7 1 (1.69%) CouchDB
7 1 (1.69%) Data Mart
7 1 (1.69%) PostgreSQL
7 1 (1.69%) Relational Database
7 1 (1.69%) Star Schema
Development Applications
1 15 (25.42%) Git (software)
2 13 (22.03%) Jenkins
3 8 (13.56%) JUnit
3 8 (13.56%) Maven
4 7 (11.86%) JIRA
5 6 (10.17%) Octopus Deploy
5 6 (10.17%) Visual Studio
6 3 (5.08%) GitLab
6 3 (5.08%) Mockito
7 2 (3.39%) Android Studio
7 2 (3.39%) Calabash
7 2 (3.39%) Cucumber
7 2 (3.39%) Gatling
7 2 (3.39%) Gradle
7 2 (3.39%) JMeter
7 2 (3.39%) Postman
7 2 (3.39%) REST Assured
7 2 (3.39%) Subversion
8 1 (1.69%) NetBeans
8 1 (1.69%) Xcode
General
1 18 (30.51%) Finance
2 7 (11.86%) Analytical Skills
2 7 (11.86%) Social Skills
3 6 (10.17%) Front Office
4 3 (5.08%) Advertising
4 3 (5.08%) Banking
5 2 (3.39%) Marketing
6 1 (1.69%) Automotive
6 1 (1.69%) Financial Institution
6 1 (1.69%) Investment Banking
6 1 (1.69%) Military
6 1 (1.69%) Music Industry
6 1 (1.69%) Police
Job Titles
1 34 (57.63%) Developer
2 9 (15.25%) Architect
3 7 (11.86%) SQL Developer
4 4 (6.78%) Java Developer
5 3 (5.08%) Angular Developer
5 3 (5.08%) Cloud Developer
5 3 (5.08%) CMS Developer
5 3 (5.08%) Full Stack Developer
5 3 (5.08%) Lead Developer
5 3 (5.08%) Salesforce Developer
5 3 (5.08%) Solutions Architect
6 2 (3.39%) Azure Engineer
6 2 (3.39%) Cloud Engineer
6 2 (3.39%) Data Analyst
6 2 (3.39%) Data Modeller
6 2 (3.39%) Designer
6 2 (3.39%) ETL Developer
6 2 (3.39%) Senior Cloud Engineer
6 2 (3.39%) Software Tester
6 2 (3.39%) UI Developer
Libraries, Frameworks & Software Standards
1 30 (50.85%) XML
2 13 (22.03%) CSS
2 13 (22.03%) HTML
3 11 (18.64%) RESTful
3 11 (18.64%) Spring
4 10 (16.95%) Web Services
5 9 (15.25%) REST
6 8 (13.56%) React
7 7 (11.86%) Spring Boot
8 6 (10.17%) AngularJS
8 6 (10.17%) SOAP
9 5 (8.47%) Kafka
9 5 (8.47%) Node.js
9 5 (8.47%) Sass
9 5 (8.47%) YAML
10 4 (6.78%) jQuery
10 4 (6.78%) JSR 170
11 3 (5.08%) .NET
11 3 (5.08%) Apache Avro
11 3 (5.08%) JMS
Miscellaneous
1 2 (3.39%) Public Cloud
2 1 (1.69%) Animation
2 1 (1.69%) Data Structures
2 1 (1.69%) Enterprise Software
2 1 (1.69%) Foreign Exchange (FX)
2 1 (1.69%) Greenfield Project
2 1 (1.69%) iPhone
2 1 (1.69%) Management Information System
2 1 (1.69%) Mobile App
2 1 (1.69%) User Experience
Operating Systems
1 4 (6.78%) Windows
2 2 (3.39%) Android
2 2 (3.39%) Windows Server
3 1 (1.69%) Apple iOS
3 1 (1.69%) Linux
3 1 (1.69%) Unix
Processes & Methodologies
1 25 (42.37%) Agile Software Development
2 20 (33.90%) DevOps
3 15 (25.42%) Microservices
4 13 (22.03%) Problem-Solving
5 9 (15.25%) ETL
6 8 (13.56%) Data Modelling
6 8 (13.56%) Scrum
6 8 (13.56%) TDD
7 7 (11.86%) Data Architecture
7 7 (11.86%) Full Stack Development
7 7 (11.86%) Workflow
8 6 (10.17%) Data Analysis
8 6 (10.17%) Target Operating Model
8 6 (10.17%) User Acceptance Testing
9 5 (8.47%) BDD
9 5 (8.47%) Data Mapping
9 5 (8.47%) Migration
10 4 (6.78%) Continuous Integration
10 4 (6.78%) Test Automation
10 4 (6.78%) Waterfall
Programming Languages
1 27 (45.76%) Java
2 22 (37.29%) SQL
3 16 (27.12%) JavaScript
4 15 (25.42%) Python
5 14 (23.73%) C#
6 7 (11.86%) T-SQL
7 6 (10.17%) VBA
8 5 (8.47%) Java 8
9 4 (6.78%) Groovy
9 4 (6.78%) Scala
10 3 (5.08%) PowerShell
11 2 (3.39%) C++
11 2 (3.39%) ES6
11 2 (3.39%) Kotlin
11 2 (3.39%) VB
12 1 (1.69%) Apple Swift
12 1 (1.69%) C
12 1 (1.69%) Ruby
12 1 (1.69%) SOQL
12 1 (1.69%) SOSL
Qualifications
1 4 (6.78%) SC Cleared
1 4 (6.78%) Security Cleared
2 2 (3.39%) Degree
3 1 (1.69%) Computer Science Degree
3 1 (1.69%) Master's Degree
Quality Assurance & Compliance
1 4 (6.78%) QA
2 2 (3.39%) Accessibility
2 2 (3.39%) GDPR
2 2 (3.39%) WCAG
System Software
1 10 (16.95%) Docker
2 2 (3.39%) Active Directory
Systems Management
1 5 (8.47%) Kibana
2 4 (6.78%) Marathon
2 4 (6.78%) Mesos
3 3 (5.08%) Ansible
3 3 (5.08%) Kubernetes
4 2 (3.39%) Terraform
5 1 (1.69%) Grafana
Vendors
1 6 (10.17%) Alteryx
2 4 (6.78%) Microsoft
2 4 (6.78%) New Relic
2 4 (6.78%) Salesforce.com
3 3 (5.08%) Oracle
4 2 (3.39%) CA
4 2 (3.39%) CA Agile Central
4 2 (3.39%) Confluent
4 2 (3.39%) Databricks
4 2 (3.39%) Google
4 2 (3.39%) MuleSoft
5 1 (1.69%) IBM
5 1 (1.69%) Informatica
5 1 (1.69%) Murex
5 1 (1.69%) SAP
5 1 (1.69%) Sitecore
5 1 (1.69%) Splunk
5 1 (1.69%) Telerik