The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for JSON skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited JSON over the 3 months to 25 March 2017 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.

3 months to
25 Mar 2017
Same period 2016 Same period 2015
JSON
East of England / Hertfordshire
Rank 37 44 46
Rank change year-on-year +7 +2  
Contract jobs citing JSON 17 15 19
As % of all contract IT jobs advertised in Hertfordshire 2.76% 2.19% 2.75%
As % of the Libraries, Frameworks & Software Standards category 9.60% 10.00% 8.72%
Number of daily rates quoted 7 10 6
Median daily rate £475 £314 £463
Median daily rate % change year-on-year +51.39% -32.16%  
90% offered a daily rate of more than £346 £270 £413
10% offered a daily rate of more than £500 £345 £506
UK excluding London median daily rate £413 £375 £350
% change year-on-year +10.00% +7.14%  
Number of hourly rates quoted 0 0 3
Median hourly rate - - £37.50
UK excluding London median hourly rate £36.50 £55.00 £37.50
% change year-on-year -33.63% +46.66%  

JSON is in the industry standards, technical specifications and software library and framework skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Hertfordshire with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
Hertfordshire
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 177 150 218
As % of all contract IT job vacancies advertised in Hertfordshire 28.69% 21.90% 31.59%
Number of daily rates quoted 120 86 119
Median daily rate £363 £345 £388
Median daily rate % change year-on-year +5.07% -10.96%  
90% offered a daily rate of more than £238 £300 £275
10% offered a daily rate of more than £525 £538 £500
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 2 6 3
Median hourly rate £37.50 £37.50 £37.50
UK excluding London median hourly rate £40.00 £38.00 £36.00
% change year-on-year +5.26% +5.55%  

JSON
Job Vacancy Trend in Hertfordshire

The job posting trend of jobs advertised in Hertfordshire citing JSON as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for JSON in Hertfordshire

JSON
Contractor Daily Rate Trend in Hertfordshire

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing JSON in Hertfordshire.

Contractor daily rate trend for JSON in Hertfordshire

JSON
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing JSON in Hertfordshire over the 3 months to 25 March 2017.

Contractor daily rate histogram for JSON in Hertfordshire

JSON
Contractor Hourly Rate Trend in Hertfordshire

This chart provides the 3-month moving average for hourly rates quoted in IT contractor jobs citing JSON in Hertfordshire.

Contractor hourly rate trend for JSON in Hertfordshire

JSON
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing JSON within the Hertfordshire region over the 3 months to 25 March 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Watford +2 6 £500 +60.00% 1
Welwyn Garden City +2 4 £488 +50.00%
Hatfield -10 2 £363 -
Welwyn +2 1 - -
Hemel Hempstead - 1 £360 -
JSON
East of England

JSON
Top 30 Related IT Skills in Hertfordshire

For the 6 months to 25 March 2017, IT contractor jobs citing JSON also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Hertfordshire region with a requirement for JSON.

1 17 (73.91%) XML
2 16 (69.57%) Java
3 15 (65.22%) JavaScript
4 12 (52.17%) Agile Software Development
5 11 (47.83%) .NET
6 10 (43.48%) TDD
6 10 (43.48%) REST
7 9 (39.13%) RESTful
7 9 (39.13%) Open Source
7 9 (39.13%) HTML
7 9 (39.13%) CSS
8 8 (34.78%) IBM
8 8 (34.78%) DevOps
8 8 (34.78%) API Development
9 7 (30.43%) E-Commerce
9 7 (30.43%) OO
9 7 (30.43%) SQL
9 7 (30.43%) C#
10 6 (26.09%) WebSphere MQ
10 6 (26.09%) XSLT
10 6 (26.09%) Linux
10 6 (26.09%) DataPower
10 6 (26.09%) Git (software)
10 6 (26.09%) WebSphere
10 6 (26.09%) IBM Integration Bus
10 6 (26.09%) jQuery
10 6 (26.09%) WebSphere Cast Iron
11 5 (21.74%) SOLID
11 5 (21.74%) Mobile App
11 5 (21.74%) Continuous Integration

JSON
Top Related IT Skills in Hertfordshire 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 6 (26.09%) WebSphere
2 3 (13.04%) Elasticsearch
2 3 (13.04%) nginx
3 2 (8.70%) CMS
3 2 (8.70%) Magnolia
4 1 (4.35%) IIS
4 1 (4.35%) NServiceBus
Applications
1 2 (8.70%) Photoshop
Business Applications
1 4 (17.39%) Dynamics CRM
1 4 (17.39%) SAP HCM
Cloud Services
1 4 (17.39%) Amazon AWS
1 4 (17.39%) Boomi
1 4 (17.39%) SuccessFactors
2 1 (4.35%) Amazon EC2
2 1 (4.35%) Amazon S3
2 1 (4.35%) Amazon SQS
2 1 (4.35%) AWS Lambda
2 1 (4.35%) GitHub
2 1 (4.35%) Route 53
Communications & Networking
1 1 (4.35%) Internet
Database & Business Intelligence
1 5 (21.74%) MySQL
2 3 (13.04%) NoSQL
2 3 (13.04%) Redis
2 3 (13.04%) SQL Server
3 1 (4.35%) Amazon DynamoDB
3 1 (4.35%) Amazon RDS
3 1 (4.35%) Oracle Database
3 1 (4.35%) SQL Server 2008
3 1 (4.35%) SQL Server 2014
Development Applications
1 6 (26.09%) Git (software)
2 3 (13.04%) Vagrant
3 2 (8.70%) Cucumber
3 2 (8.70%) Grunt
3 2 (8.70%) gulp
3 2 (8.70%) HP UFT
3 2 (8.70%) Jenkins
3 2 (8.70%) JIRA
3 2 (8.70%) Visual Studio
4 1 (4.35%) Android Studio
4 1 (4.35%) Gradle
4 1 (4.35%) Octopus Deploy
4 1 (4.35%) Team Foundation Server
General
1 3 (13.04%) Retail
2 1 (4.35%) Finance
2 1 (4.35%) Publishing
2 1 (4.35%) Telecoms
Job Titles
1 14 (60.87%) Developer
2 7 (30.43%) Architect
3 6 (26.09%) Integration Developer
4 5 (21.74%) WebSphere Developer
5 4 (17.39%) Java Architect
6 3 (13.04%) .NET Developer
7 2 (8.70%) Analyst
7 2 (8.70%) Automation Test Analyst
7 2 (8.70%) AWS Architect
7 2 (8.70%) C# .NET Developer
7 2 (8.70%) C# Developer
7 2 (8.70%) Front End Developer (Client-Side Developer)
7 2 (8.70%) Test Analyst
8 1 (4.35%) ASP.NET MVC Developer
8 1 (4.35%) C# ASP.NET Developer
8 1 (4.35%) E-Commerce Architect
8 1 (4.35%) E-Commerce Solution Architect
8 1 (4.35%) UI Developer
8 1 (4.35%) Web Developer
8 1 (4.35%) Web UI Developer
Libraries, Frameworks & Software Standards
1 17 (73.91%) XML
2 11 (47.83%) .NET
3 10 (43.48%) REST
4 9 (39.13%) CSS
4 9 (39.13%) HTML
4 9 (39.13%) RESTful
5 6 (26.09%) IBM Integration Bus
5 6 (26.09%) jQuery
5 6 (26.09%) WebSphere MQ
5 6 (26.09%) XSLT
6 4 (17.39%) Ajax
6 4 (17.39%) AngularJS
6 4 (17.39%) ASP.NET Web API
6 4 (17.39%) CSS3
6 4 (17.39%) HTML5
6 4 (17.39%) Twitter Bootstrap
7 3 (13.04%) LEMP Stack
7 3 (13.04%) Pyramid
7 3 (13.04%) Spring Boot
7 3 (13.04%) Web Services
Miscellaneous
1 6 (26.09%) DataPower
2 5 (21.74%) iPad
2 5 (21.74%) Mobile App
3 3 (13.04%) Analytical Skills
3 3 (13.04%) User Experience
4 2 (8.70%) W3C
5 1 (4.35%) RIA
5 1 (4.35%) Tandem
Operating Systems
1 6 (26.09%) Linux
2 3 (13.04%) Unix
3 1 (4.35%) Android
Processes & Methodologies
1 12 (52.17%) Agile Software Development
2 10 (43.48%) TDD
3 9 (39.13%) Open Source
4 8 (34.78%) API Development
4 8 (34.78%) DevOps
5 7 (30.43%) E-Commerce
5 7 (30.43%) OO
6 5 (21.74%) Continuous Integration
6 5 (21.74%) CRM
6 5 (21.74%) SOLID
7 4 (17.39%) Configuration Management
7 4 (17.39%) Release Management
8 3 (13.04%) BDD
8 3 (13.04%) Continuous Delivery
8 3 (13.04%) Microservices
8 3 (13.04%) MVC
8 3 (13.04%) Refactoring
8 3 (13.04%) Unit Testing
8 3 (13.04%) Web Development
9 2 (8.70%) API Design
Programming Languages
1 16 (69.57%) Java
2 15 (65.22%) JavaScript
3 7 (30.43%) C#
3 7 (30.43%) SQL
4 3 (13.04%) C++
4 3 (13.04%) Go
4 3 (13.04%) Lua
4 3 (13.04%) Python
5 2 (8.70%) Shell Script
5 2 (8.70%) T-SQL
6 1 (4.35%) Groovy
6 1 (4.35%) PL/SQL
Qualifications
1 1 (4.35%) ISEB
Quality Assurance & Compliance
1 2 (8.70%) WAI
System Software
1 3 (13.04%) Docker
Systems Management
1 6 (26.09%) WebSphere Cast Iron
2 2 (8.70%) TeamSite
Vendors
1 8 (34.78%) IBM
2 4 (17.39%) Dell
2 4 (17.39%) SAP
3 2 (8.70%) HP
3 2 (8.70%) Oracle
4 1 (4.35%) Microsoft
4 1 (4.35%) Telerik