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 26 June 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.

JSON
East of England / Hertfordshire
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 34 48 72
Rank change year-on-year +14 +24  
Contract jobs citing JSON 27 9 7
As % of all contract IT jobs advertised in Hertfordshire 4.28% 1.40% 0.78%
As % of the Libraries, Frameworks & Software Standards category 17.88% 7.89% 3.07%
Number of daily rates quoted 18 5 5
Median daily rate £400 £425 £338
Median daily rate % change year-on-year -5.88% +25.92%  
90% offered a daily rate of more than £335 £293 £288
10% offered a daily rate of more than £456 £464 £428
UK excluding London median daily rate £425 £400 £375
% change year-on-year +6.25% +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £29.14 £55.00
% change year-on-year +42.41% -47.01%  

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 151 114 228
As % of all contract IT job vacancies advertised in Hertfordshire 23.93% 17.67% 25.50%
Number of daily rates quoted 109 75 122
Median daily rate £375 £425 £375
Median daily rate % change year-on-year -11.76% +13.33%  
90% offered a daily rate of more than £290 £300 £288
10% offered a daily rate of more than £450 £500 £456
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 1 0 7
Median hourly rate £15.00 - £20.94
UK excluding London median hourly rate £42.50 £36.00 £40.00
% change year-on-year +18.05% -10.00%  

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 26 June 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 contractor hourly rates quoted in IT 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 26 June 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 -1 6 £350 +47.36% 3
Hemel Hempstead - 4 £368 - 1
Welwyn Garden City - 1 £475 -
Hatfield - 1 £400 - 2
JSON
East of England

For the 6 months to 26 June 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 32 (72.73%) JavaScript
2 24 (54.55%) XML
3 22 (50.00%) SQL
3 22 (50.00%) HTML
3 22 (50.00%) .NET
4 21 (47.73%) CSS
5 20 (45.45%) jQuery
6 17 (38.64%) Agile Software Development
6 17 (38.64%) RESTful
7 15 (34.09%) HTML5
7 15 (34.09%) REST
7 15 (34.09%) Java
8 14 (31.82%) CSS3
9 13 (29.55%) C#
10 12 (27.27%) SQL Server
10 12 (27.27%) ASP.NET
10 12 (27.27%) TDD
10 12 (27.27%) Git (software)
11 9 (20.45%) MVC
11 9 (20.45%) Web Services
11 9 (20.45%) Node.js
11 9 (20.45%) Open Source
11 9 (20.45%) Twitter Bootstrap
11 9 (20.45%) API Development
12 8 (18.18%) Mobile App
12 8 (18.18%) Amazon AWS
12 8 (18.18%) OO
12 8 (18.18%) XHTML
12 8 (18.18%) CRM
12 8 (18.18%) Web Development

JSON
Co-occurring 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 (13.64%) WebSphere
2 4 (9.09%) IIS
2 4 (9.09%) SharePoint
3 3 (6.82%) CMS
3 3 (6.82%) Magnolia
4 2 (4.55%) Elasticsearch
5 1 (2.27%) Apache
5 1 (2.27%) MQSeries
5 1 (2.27%) nginx
5 1 (2.27%) OpenStack
5 1 (2.27%) Tomcat
Applications
1 3 (6.82%) Photoshop
Business Applications
1 8 (18.18%) Dynamics CRM
2 4 (9.09%) SAP HCM
3 1 (2.27%) Oracle Receivables
Cloud Services
1 8 (18.18%) Amazon AWS
2 4 (9.09%) Amazon S3
2 4 (9.09%) AWS Lambda
2 4 (9.09%) Boomi
2 4 (9.09%) SuccessFactors
3 3 (6.82%) AWS CloudFormation
4 1 (2.27%) Amazon EC2
4 1 (2.27%) Amazon SQS
4 1 (2.27%) GitHub
4 1 (2.27%) Google Cloud Platform
4 1 (2.27%) Route 53
Communications & Networking
1 1 (2.27%) HTTP
1 1 (2.27%) Internet
1 1 (2.27%) iSCSI
1 1 (2.27%) LDAP
1 1 (2.27%) OpenLDAP
1 1 (2.27%) SNMP
1 1 (2.27%) Wireless
Database & Business Intelligence
1 12 (27.27%) SQL Server
2 4 (9.09%) Amazon DynamoDB
2 4 (9.09%) SQL Server Reporting Services
3 3 (6.82%) MySQL
3 3 (6.82%) SQL Server 2012
4 2 (4.55%) SQL Server 2008
4 2 (4.55%) SQL Server 2014
5 1 (2.27%) Amazon RDS
5 1 (2.27%) NoSQL
5 1 (2.27%) Redis
Development Applications
1 12 (27.27%) Git (software)
2 7 (15.91%) Grunt
2 7 (15.91%) gulp
2 7 (15.91%) Visual Studio
3 4 (9.09%) JIRA
3 4 (9.09%) Subversion
3 4 (9.09%) webpack
4 2 (4.55%) Jenkins
4 2 (4.55%) Team Foundation Server
5 1 (2.27%) Android Studio
5 1 (2.27%) Bitbucket
5 1 (2.27%) git-flow
5 1 (2.27%) Gradle
5 1 (2.27%) JIRA Agile
5 1 (2.27%) Maven
5 1 (2.27%) Mockito
5 1 (2.27%) Octopus Deploy
5 1 (2.27%) Talend Open Studio
5 1 (2.27%) Vagrant
5 1 (2.27%) Xcode
General
1 5 (11.36%) Retail
2 3 (6.82%) Finance
3 1 (2.27%) French Language
3 1 (2.27%) Games
3 1 (2.27%) Publishing
3 1 (2.27%) Telecoms
Job Titles
1 37 (84.09%) Developer
2 10 (22.73%) .NET Developer
3 9 (20.45%) JavaScript Developer
4 6 (13.64%) Integration Developer
4 6 (13.64%) SQL Developer
5 5 (11.36%) WebSphere Developer
6 4 (9.09%) .NET Team Leader
6 4 (9.09%) Applications Developer
6 4 (9.09%) Architect
6 4 (9.09%) C# .NET Developer
6 4 (9.09%) C# Developer
6 4 (9.09%) CRM Developer
6 4 (9.09%) Dynamics CRM Developer
6 4 (9.09%) Lead .NET Developer
6 4 (9.09%) Lead Developer
6 4 (9.09%) Node.js Developer
6 4 (9.09%) Team Leader
7 3 (6.82%) AWS Developer
7 3 (6.82%) Front End Developer (Client-Side Developer)
7 3 (6.82%) Full Stack Developer
Libraries, Frameworks & Software Standards
1 24 (54.55%) XML
2 22 (50.00%) .NET
2 22 (50.00%) HTML
3 21 (47.73%) CSS
4 20 (45.45%) jQuery
5 17 (38.64%) RESTful
6 15 (34.09%) HTML5
6 15 (34.09%) REST
7 14 (31.82%) CSS3
8 12 (27.27%) ASP.NET
9 9 (20.45%) Node.js
9 9 (20.45%) Twitter Bootstrap
9 9 (20.45%) Web Services
10 8 (18.18%) Ajax
10 8 (18.18%) XHTML
11 7 (15.91%) AngularJS
11 7 (15.91%) XSLT
12 6 (13.64%) KnockoutJS
12 6 (13.64%) React
12 6 (13.64%) WebSphere MQ
Miscellaneous
1 8 (18.18%) Mobile App
2 6 (13.64%) DataPower
3 4 (9.09%) Greenfield Project
3 4 (9.09%) iPad
4 3 (6.82%) User Experience
4 3 (6.82%) W3C
5 2 (4.55%) Analytical Skills
5 2 (4.55%) Replication
5 2 (4.55%) Tandem
6 1 (2.27%) Social Media
Operating Systems
1 3 (6.82%) Linux
2 2 (4.55%) Unix
3 1 (2.27%) Android
3 1 (2.27%) Apple iOS
3 1 (2.27%) CentOS
3 1 (2.27%) Debian
3 1 (2.27%) HPUX
3 1 (2.27%) Solaris
3 1 (2.27%) Ubuntu
3 1 (2.27%) Windows
Processes & Methodologies
1 17 (38.64%) Agile Software Development
2 12 (27.27%) TDD
3 9 (20.45%) API Development
3 9 (20.45%) MVC
3 9 (20.45%) Open Source
4 8 (18.18%) CRM
4 8 (18.18%) OO
4 8 (18.18%) Web Development
5 7 (15.91%) DevOps
6 6 (13.64%) BDD
7 5 (11.36%) Continuous Integration
7 5 (11.36%) Digital Transformation Programme
7 5 (11.36%) E-Commerce
7 5 (11.36%) Scrum
7 5 (11.36%) SOLID
8 4 (9.09%) Configuration Management
8 4 (9.09%) Front End Development
8 4 (9.09%) MVVM
8 4 (9.09%) Release Management
9 3 (6.82%) Responsive Web Design
Programming Languages
1 32 (72.73%) JavaScript
2 22 (50.00%) SQL
3 15 (34.09%) Java
4 13 (29.55%) C#
5 6 (13.64%) T-SQL
6 4 (9.09%) Python
6 4 (9.09%) VB.NET
7 1 (2.27%) AWK
7 1 (2.27%) Bash Shell
7 1 (2.27%) C++
7 1 (2.27%) Go
7 1 (2.27%) Groovy
7 1 (2.27%) Lua
7 1 (2.27%) Objective-C
7 1 (2.27%) Perl
7 1 (2.27%) sed
7 1 (2.27%) VBScript
Qualifications
1 1 (2.27%) Degree
Quality Assurance & Compliance
1 4 (9.09%) QA
2 3 (6.82%) WAI
System Software
1 1 (2.27%) Docker
1 1 (2.27%) VMware Infrastructure
Systems Management
1 6 (13.64%) WebSphere Cast Iron
2 3 (6.82%) TeamSite
3 1 (2.27%) ZABBIX
Vendors
1 7 (15.91%) IBM
1 7 (15.91%) Microsoft
2 5 (11.36%) Dell
2 5 (11.36%) SAP
3 2 (4.55%) Telerik
4 1 (2.27%) EMC
4 1 (2.27%) Google
4 1 (2.27%) HP
4 1 (2.27%) Oracle
4 1 (2.27%) Talend
4 1 (2.27%) VMware