The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for Big Data skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Big Data 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
Big Data
East of England / Hertfordshire
Rank 35 57 61
Rank change year-on-year +22 +4  
Contract jobs citing Big Data 19 2 4
As % of all contract IT jobs advertised in Hertfordshire 3.08% 0.29% 0.58%
As % of the Database & Business Intelligence category 15.83% 2.41% 2.42%
Number of daily rates quoted 13 2 3
Median daily rate £525 £500 £400
Median daily rate % change year-on-year +5.00% +25.00%  
UK excluding London median daily rate £484 £470 £500
% change year-on-year +3.03% -6.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £47.00 £33.06 £34.50
% change year-on-year +42.18% -4.18%  

Big Data is in the database and business intelligence 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 database and business intelligence skills.

Contract Database & Business Intelligence Skills
Hertfordshire
Contract job vacancies with a requirement for database and business intelligence skills 120 83 165
As % of all contract IT job vacancies advertised in Hertfordshire 19.45% 12.12% 23.91%
Number of daily rates quoted 79 38 93
Median daily rate £400 £388 £400
Median daily rate % change year-on-year +3.22% -3.12%  
90% offered a daily rate of more than £249 £292 £265
10% offered a daily rate of more than £550 £475 £500
UK excluding London median daily rate £400 £388 £375
% change year-on-year +3.22% +3.33%  
Number of hourly rates quoted 1 1 2
Median hourly rate £27.50 £37.50 £14.85
Median hourly rate % change year-on-year -26.66% +152.52%  
UK excluding London median hourly rate £31.00 £32.50 £32.50
% change year-on-year -4.61% -  

Big Data
Job Vacancy Trend in Hertfordshire

The job posting trend of jobs advertised in Hertfordshire citing Big Data as a proportion of all contract or permanent IT jobs with a match in the Database & Business Intelligence category.

Job vacancy trend for Big Data in Hertfordshire

Big Data
Contractor Daily Rate Trend in Hertfordshire

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

Contractor daily rate trend for Big Data in Hertfordshire

Big Data
Contractor Daily Rate Histogram in Hertfordshire

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

Contractor daily rate histogram for Big Data in Hertfordshire

Big Data
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 Big Data 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
Welwyn Garden City - 7 £450 -
Hatfield - 6 £550 -
Watford +3 5 £475 -
Welwyn - 1 £250 -
Big Data
East of England

Big Data
Top 30 Related IT Skills in Hertfordshire

For the 6 months to 25 March 2017, IT contractor jobs citing Big Data 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 Big Data.

1 18 (62.07%) Agile Software Development
1 18 (62.07%) DevOps
2 12 (41.38%) Analytics
3 10 (34.48%) Data Analytics
3 10 (34.48%) Risk Management
3 10 (34.48%) Information Security
4 9 (31.03%) Management Information System
4 9 (31.03%) Middleware
4 9 (31.03%) Information Assurance
4 9 (31.03%) Security Architecture
4 9 (31.03%) Waterfall
4 9 (31.03%) Database Security
4 9 (31.03%) Big Data Analytics
4 9 (31.03%) Data Centre
5 7 (24.14%) Opscode Chef
5 7 (24.14%) Puppet
6 6 (20.69%) Apache Cassandra
6 6 (20.69%) NoSQL
6 6 (20.69%) Java
6 6 (20.69%) Unix
6 6 (20.69%) TDD
6 6 (20.69%) Service Design
7 5 (17.24%) Spring
7 5 (17.24%) Client/Server
7 5 (17.24%) Linux
7 5 (17.24%) OO
7 5 (17.24%) Python
7 5 (17.24%) Open Source
7 5 (17.24%) Hadoop
7 5 (17.24%) Mentoring

Big Data
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 1 (3.45%) Apache Spark
1 1 (3.45%) SAS
Applications
1 2 (6.90%) MS Excel
1 2 (6.90%) MS Office
1 2 (6.90%) MS PowerPoint
2 1 (3.45%) GNU Octave
Cloud Services
1 4 (13.79%) Amazon AWS
2 2 (6.90%) GitHub
2 2 (6.90%) Office 365
2 2 (6.90%) Trello
Communications & Networking
1 2 (6.90%) Internet
2 1 (3.45%) Firewall
Database & Business Intelligence
1 6 (20.69%) Apache Cassandra
1 6 (20.69%) NoSQL
2 5 (17.24%) Hadoop
3 2 (6.90%) HBase
4 1 (3.45%) Apache Hive
4 1 (3.45%) RDBMS
4 1 (3.45%) Relational Database
Development Applications
1 2 (6.90%) Jenkins
1 2 (6.90%) JIRA
General
1 4 (13.79%) Retail
2 2 (6.90%) Front Office
2 2 (6.90%) Marketing
Job Titles
1 10 (34.48%) Developer
2 9 (31.03%) Applications Consultant
2 9 (31.03%) Consultant
2 9 (31.03%) Security Consultant
3 7 (24.14%) AWS Developer
4 6 (20.69%) Java Developer
5 4 (13.79%) Analyst
5 4 (13.79%) AWS DevOps
5 4 (13.79%) Big Data Analyst
5 4 (13.79%) Business Analyst
5 4 (13.79%) Data Business Analyst
5 4 (13.79%) Python Developer
5 4 (13.79%) Senior Developer
5 4 (13.79%) Senior DevOps
5 4 (13.79%) Senior Java Developer
6 2 (6.90%) Data Analyst
6 2 (6.90%) DevOps Engineer
6 2 (6.90%) Senior DevOps Engineer
7 1 (3.45%) Help Desk Support
7 1 (3.45%) Support Engineer
Libraries, Frameworks & Software Standards
1 9 (31.03%) Middleware
2 5 (17.24%) Spring
3 1 (3.45%) NumPy
3 1 (3.45%) SciPy
Miscellaneous
1 9 (31.03%) Data Centre
1 9 (31.03%) Management Information System
2 5 (17.24%) Client/Server
3 2 (6.90%) Credit Risk
4 1 (3.45%) Analytical Skills
4 1 (3.45%) Security Operations Centre
Operating Systems
1 6 (20.69%) Unix
2 5 (17.24%) Linux
3 3 (10.34%) Windows
4 2 (6.90%) Windows 10
4 2 (6.90%) Windows 7
4 2 (6.90%) Windows 8
4 2 (6.90%) Windows Server
4 2 (6.90%) Windows Server 2008
5 1 (3.45%) Android
5 1 (3.45%) Apple iOS
Processes & Methodologies
1 18 (62.07%) Agile Software Development
1 18 (62.07%) DevOps
2 12 (41.38%) Analytics
3 10 (34.48%) Data Analytics
3 10 (34.48%) Information Security
3 10 (34.48%) Risk Management
4 9 (31.03%) Big Data Analytics
4 9 (31.03%) Database Security
4 9 (31.03%) Information Assurance
4 9 (31.03%) Security Architecture
4 9 (31.03%) Waterfall
5 6 (20.69%) Service Design
5 6 (20.69%) TDD
6 5 (17.24%) Mentoring
6 5 (17.24%) OO
6 5 (17.24%) Open Source
7 4 (13.79%) Business Intelligence
8 3 (10.34%) Machine Learning
9 2 (6.90%) Use Case
9 2 (6.90%) Web Analytics
Programming Languages
1 6 (20.69%) Java
2 5 (17.24%) Python
3 4 (13.79%) SQL
4 1 (3.45%) MATLAB
4 1 (3.45%) R
Qualifications
1 1 (3.45%) CISM
1 1 (3.45%) CISSP
1 1 (3.45%) IISP
1 1 (3.45%) PMP
Quality Assurance & Compliance
1 1 (3.45%) SLA
System Software
1 2 (6.90%) Active Directory
1 2 (6.90%) Docker
Systems Management
1 7 (24.14%) Opscode Chef
1 7 (24.14%) Puppet
2 2 (6.90%) Ansible
2 2 (6.90%) Kubernetes
2 2 (6.90%) Terraform
3 1 (3.45%) Host Intrusion Detection System
Vendors
1 2 (6.90%) Microsoft
1 2 (6.90%) New Relic
1 2 (6.90%) Splunk
2 1 (3.45%) Oracle
2 1 (3.45%) SAP
2 1 (3.45%) Teradata