The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for Apache Cassandra skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Apache Cassandra over the 3 months to 28 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.

Apache Cassandra
East of England / Hertfordshire
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 51 - 64
Rank change year-on-year - 0  
Contract jobs citing Apache Cassandra 6 0 2
As % of all contract IT jobs advertised in Hertfordshire 1.02% - 0.28%
As % of the Database & Business Intelligence category 5.17% - 1.21%
Number of daily rates quoted 6 0 1
Median daily rate £550 - £425
UK excluding London median daily rate £484 £550 £600
% change year-on-year -12.04% -8.33%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

Apache Cassandra 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 116 83 165
As % of all contract IT job vacancies advertised in Hertfordshire 19.66% 12.08% 23.31%
Number of daily rates quoted 77 38 92
Median daily rate £409 £388 £400
Median daily rate % change year-on-year +5.48% -3.12%  
90% offered a daily rate of more than £250 £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 £34.62 £32.50 £32.50
% change year-on-year +6.52% -  

Apache Cassandra
Job Vacancy Trend in Hertfordshire

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

Job vacancy trend for Apache Cassandra in Hertfordshire

Apache Cassandra
Contractor Daily Rate Trend in Hertfordshire

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

Contractor daily rate trend for Apache Cassandra in Hertfordshire

Apache Cassandra
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing Apache Cassandra in Hertfordshire over the 3 months to 28 March 2017.

Contractor daily rate histogram for Apache Cassandra in Hertfordshire

Apache Cassandra
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 Apache Cassandra within the Hertfordshire region over the 3 months to 28 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
Hatfield - 5 £550 - 1
Watford - 1 £750 -
Apache Cassandra
East of England

Apache Cassandra
Top 30 Co-occurring IT Skills in Hertfordshire

For the 6 months to 28 March 2017, IT contractor jobs citing Apache Cassandra 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 Apache Cassandra.

1 10 (90.91%) Java
1 10 (90.91%) Agile Software Development
1 10 (90.91%) TDD
2 7 (63.64%) NoSQL
3 6 (54.55%) Big Data
3 6 (54.55%) DevOps
4 5 (45.45%) Mentoring
4 5 (45.45%) Opscode Chef
4 5 (45.45%) BDD
4 5 (45.45%) Puppet
4 5 (45.45%) MongoDB
4 5 (45.45%) Service Design
4 5 (45.45%) Client/Server
4 5 (45.45%) Unix
4 5 (45.45%) Linux
4 5 (45.45%) OO
4 5 (45.45%) Pair Programming
4 5 (45.45%) Spring
4 5 (45.45%) Continuous Integration
4 5 (45.45%) Open Source
5 4 (36.36%) Apache Spark
5 4 (36.36%) Continuous Delivery
6 3 (27.27%) Scrum
7 2 (18.18%) Finance
7 2 (18.18%) Haskell
7 2 (18.18%) E-Commerce
8 1 (9.09%) R
8 1 (9.09%) REST
8 1 (9.09%) HBase
8 1 (9.09%) Machine Learning

Apache Cassandra
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 4 (36.36%) Apache Spark
Applications
1 1 (9.09%) GNU Octave
Database & Business Intelligence
1 7 (63.64%) NoSQL
2 6 (54.55%) Big Data
3 5 (45.45%) MongoDB
4 1 (9.09%) Hadoop
4 1 (9.09%) HBase
4 1 (9.09%) RDBMS
4 1 (9.09%) Relational Database
General
1 2 (18.18%) Finance
Job Titles
1 10 (90.91%) Developer
1 10 (90.91%) Java Developer
2 8 (72.73%) Senior Developer
2 8 (72.73%) Senior Java Developer
3 5 (45.45%) Agile Developer
3 5 (45.45%) Agile Java Developer
4 4 (36.36%) Senior Agile Developer
4 4 (36.36%) Senior Agile Java Developer
5 3 (27.27%) AWS Developer
5 3 (27.27%) AWS DevOps
6 2 (18.18%) Senior DevOps
7 1 (9.09%) Architect
7 1 (9.09%) Data Architect
7 1 (9.09%) Enterprise Architect
7 1 (9.09%) Enterprise Data Architect
Libraries, Frameworks & Software Standards
1 5 (45.45%) Spring
2 1 (9.09%) Dropwizard
2 1 (9.09%) NumPy
2 1 (9.09%) REST
2 1 (9.09%) SciPy
2 1 (9.09%) SOAP
Miscellaneous
1 5 (45.45%) Client/Server
2 1 (9.09%) Analytical Skills
2 1 (9.09%) Data Centre
Operating Systems
1 5 (45.45%) Linux
1 5 (45.45%) Unix
Processes & Methodologies
1 10 (90.91%) Agile Software Development
1 10 (90.91%) TDD
2 6 (54.55%) DevOps
3 5 (45.45%) BDD
3 5 (45.45%) Continuous Integration
3 5 (45.45%) Mentoring
3 5 (45.45%) OO
3 5 (45.45%) Open Source
3 5 (45.45%) Pair Programming
3 5 (45.45%) Service Design
4 4 (36.36%) Continuous Delivery
5 3 (27.27%) Scrum
6 2 (18.18%) E-Commerce
7 1 (9.09%) Business Intelligence
7 1 (9.09%) Continuous Deployment
7 1 (9.09%) Kanban
7 1 (9.09%) Logistic Regression
7 1 (9.09%) Machine Learning
7 1 (9.09%) Neural Network
7 1 (9.09%) Presales
Programming Languages
1 10 (90.91%) Java
2 2 (18.18%) Haskell
3 1 (9.09%) MATLAB
3 1 (9.09%) Python
3 1 (9.09%) R
3 1 (9.09%) SQL
Systems Management
1 5 (45.45%) Opscode Chef
1 5 (45.45%) Puppet
Vendors
1 1 (9.09%) Oracle
1 1 (9.09%) SAP
1 1 (9.09%) Teradata