Period
to 19 November 2017

The following table provides summary statistics for contract job vacancies advertised in Welwyn Garden City 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 6 months to 19 November 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.

Big Data
Hertfordshire > Welwyn Garden City
6 months to
19 Nov 2017
Same period 2016 Same period 2015
Rank 16 23 22
Rank change year-on-year +7 -1 -
Contract jobs citing Big Data 6 1 1
As % of all contract IT jobs advertised in Welwyn Garden City 4.62% 0.64% 0.80%
As % of the Database & Business Intelligence category 25.00% 3.13% 4.55%
Number of daily rates quoted 0 0 0
Welwyn Garden City median daily rate - - -
Hertfordshire median daily rate £575 £425 £500
% change year-on-year +35.29% -15.00% -4.76%
Number of hourly rates quoted 0 0 0
Welwyn Garden City median hourly rate - - -
Hertfordshire median hourly rate - - £62.50

Big Data is in the Databases and Business Intelligence category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Welwyn Garden City with a requirement for database or business intelligence skills.

All Database and Business Intelligence Skills
Welwyn Garden City
Contract vacancies with a requirement for database or business intelligence skills 24 32 22
As % of all contract IT jobs advertised in Welwyn Garden City 18.46% 20.51% 17.60%
Number of daily rates quoted 10 24 8
Welwyn Garden City median daily rate £450 £338 £309
Median daily rate % change year-on-year +33.33% +9.31% +12.27%
10th Percentile £314 £219 £244
90th Percentile £538 £469 £315
Hertfordshire median daily rate £425 £400 £375
% change year-on-year +6.25% +6.67% +5.63%
Number of hourly rates quoted 0 0 0
Welwyn Garden City median hourly rate - - -
Hertfordshire median hourly rate £18.25 £28.54 £15.00
% change year-on-year -36.05% +90.27% -25.00%

Big Data
Job Vacancy Trend in Welwyn Garden City

Job postings citing Big Data as a percentage of all IT jobs advertised in Welwyn Garden City.

Job vacancy trend for Big Data in Welwyn Garden City

Big Data
Contractor Daily Rate Trend in Welwyn Garden City

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

Contractor daily rate trend for Big Data in Welwyn Garden City

For the 6 months to 19 November 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 Welwyn Garden City region with a requirement for Big Data.

1 6 (100.00%) Amazon AWS
1 6 (100.00%) Apache Spark
1 6 (100.00%) Analytics
2 3 (50.00%) Amazon Redshift
2 3 (50.00%) Microservices
2 3 (50.00%) Loose Coupling
2 3 (50.00%) Spark Streaming
2 3 (50.00%) Spring Cloud
2 3 (50.00%) Mathematical Modelling
2 3 (50.00%) Creative Thinking
2 3 (50.00%) Predictive Modelling
2 3 (50.00%) BDD
2 3 (50.00%) Apache Cassandra
2 3 (50.00%) NoSQL
2 3 (50.00%) R
2 3 (50.00%) Tableau
2 3 (50.00%) Machine Learning
2 3 (50.00%) Data Analytics
2 3 (50.00%) SQL
2 3 (50.00%) SQL Server
2 3 (50.00%) Web Services
2 3 (50.00%) Python
2 3 (50.00%) Data Modelling
2 3 (50.00%) Agile Software Development
2 3 (50.00%) TDD
2 3 (50.00%) Retail
2 3 (50.00%) Statistics
2 3 (50.00%) Predictive Analytics
2 3 (50.00%) Mathematics
2 3 (50.00%) QA

Big Data
Co-occurring IT Skills in Welwyn Garden City 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 (100.00%) Apache Spark
Cloud Services
1 6 (100.00%) Amazon AWS
2 1 (16.67%) Amazon EC2
Database & Business Intelligence
1 3 (50.00%) Amazon Redshift
1 3 (50.00%) Apache Cassandra
1 3 (50.00%) Hadoop
1 3 (50.00%) NoSQL
1 3 (50.00%) SQL Server
General
1 3 (50.00%) Retail
Job Titles
1 3 (50.00%) Data Scientist
1 3 (50.00%) Database Developer
1 3 (50.00%) Developer
Libraries, Frameworks & Software Standards
1 3 (50.00%) RESTful
1 3 (50.00%) Spark Streaming
1 3 (50.00%) Spring Cloud
1 3 (50.00%) Web Services
Processes & Methodologies
1 6 (100.00%) Analytics
2 3 (50.00%) Agile Software Development
2 3 (50.00%) BDD
2 3 (50.00%) Continuous Integration
2 3 (50.00%) Creative Thinking
2 3 (50.00%) Data Analytics
2 3 (50.00%) Data Modelling
2 3 (50.00%) Loose Coupling
2 3 (50.00%) Machine Learning
2 3 (50.00%) Mathematical Modelling
2 3 (50.00%) Mathematics
2 3 (50.00%) Microservices
2 3 (50.00%) Predictive Analytics
2 3 (50.00%) Predictive Modelling
2 3 (50.00%) Statistics
2 3 (50.00%) TDD
Programming Languages
1 3 (50.00%) Python
1 3 (50.00%) R
1 3 (50.00%) SQL
Quality Assurance & Compliance
1 3 (50.00%) QA
Vendors
1 3 (50.00%) Tableau