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

Data Mining
London / City of London
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 156 153 186
Rank change year-on-year -3 +33  
Contract jobs citing Data Mining 10 12 19
As % of all contract IT jobs advertised in the City of London 0.31% 0.36% 0.33%
As % of the Database & Business Intelligence category 1.20% 1.48% 1.29%
Number of daily rates quoted 8 9 11
Median daily rate £550 £550 £438
Median daily rate % change year-on-year - +25.71%  
90% offered a daily rate of more than £464 £400 £330
10% offered a daily rate of more than £725 £650 £575
UK excluding London median daily rate £413 £413 £375
% change year-on-year - +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £12.00 - -

Data Mining 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 the City of London with a requirement for database and business intelligence skills.

Contract Database & Business Intelligence Skills
City of London
Contract job vacancies with a requirement for database and business intelligence skills 836 813 1475
As % of all contract IT job vacancies advertised in the City of London 25.62% 24.15% 25.69%
Number of daily rates quoted 652 648 1171
Median daily rate £503 £475 £450
Median daily rate % change year-on-year +5.78% +5.55%  
90% offered a daily rate of more than £388 £340 £325
10% offered a daily rate of more than £650 £625 £600
UK excluding London median daily rate £400 £375 £350
% change year-on-year +6.66% +7.14%  
Number of hourly rates quoted 2 4 7
Median hourly rate £21.50 £17.88 £30.00
Median hourly rate % change year-on-year +20.27% -40.41%  
UK excluding London median hourly rate £38.00 £31.14 £26.00
% change year-on-year +22.04% +19.75%  

Data Mining
Job Vacancy Trend in the City of London

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

Job vacancy trend for Data Mining in the City of London

Data Mining
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Data Mining in the City of London.

Contractor daily rate trend for Data Mining in the City of London

Data Mining
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Data Mining in the City of London over the 3 months to 28 June 2017.

Contractor daily rate histogram for Data Mining in the City of London

Data Mining
Contractor Hourly Rate Trend in the City of London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Data Mining in the City of London.

Contractor hourly rate trend for Data Mining in the City of London

For the 6 months to 28 June 2017, IT contractor jobs citing Data Mining 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 City of London region with a requirement for Data Mining.

1 10 (58.82%) Python
2 8 (47.06%) SQL
3 6 (35.29%) Analytical Skills
4 5 (29.41%) R
4 5 (29.41%) Machine Learning
4 5 (29.41%) Data Quality
4 5 (29.41%) Finance
4 5 (29.41%) Agile Software Development
5 4 (23.53%) Banking
5 4 (23.53%) Data Analysis
5 4 (23.53%) Analytics
6 3 (17.65%) Process Improvement
6 3 (17.65%) Stakeholder Engagement
6 3 (17.65%) Mentoring
6 3 (17.65%) Statistics
6 3 (17.65%) Data Management
6 3 (17.65%) Investment Banking
6 3 (17.65%) Robotics
6 3 (17.65%) SC Cleared
6 3 (17.65%) Security Cleared
6 3 (17.65%) Data Architecture
6 3 (17.65%) Visualisation
6 3 (17.65%) Front Office
6 3 (17.65%) CRM
6 3 (17.65%) Data Modelling
6 3 (17.65%) ETL
7 2 (11.76%) Unix
7 2 (11.76%) Linux
7 2 (11.76%) PhD
7 2 (11.76%) MySQL

Data Mining
Co-occurring IT Skills in the City of London 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 2 (11.76%) Elasticsearch
2 1 (5.88%) Apache Pig
2 1 (5.88%) Apache Spark
2 1 (5.88%) Confluence
Applications
1 1 (5.88%) Weka
Business Applications
1 1 (5.88%) RMDS
Cloud Services
1 1 (5.88%) Amazon AWS
1 1 (5.88%) GitHub
1 1 (5.88%) Quay.io
Database & Business Intelligence
1 2 (11.76%) Apache Hive
1 2 (11.76%) Big Data
1 2 (11.76%) MySQL
1 2 (11.76%) NoSQL
1 2 (11.76%) Relational Database
2 1 (5.88%) Apache Cassandra
2 1 (5.88%) Data Warehouse
2 1 (5.88%) Hadoop
2 1 (5.88%) HBase
2 1 (5.88%) MongoDB
2 1 (5.88%) PostgreSQL
2 1 (5.88%) PowerPivot
Development Applications
1 2 (11.76%) JIRA
2 1 (5.88%) CircleCI
2 1 (5.88%) Git (software)
General
1 5 (29.41%) Finance
2 4 (23.53%) Banking
3 3 (17.65%) Front Office
3 3 (17.65%) Investment Banking
4 2 (11.76%) Retail
Job Titles
1 7 (41.18%) Analyst
2 6 (35.29%) Data Analyst
3 4 (23.53%) Developer
4 3 (17.65%) Data Scientist
4 3 (17.65%) Machine Learning Developer
4 3 (17.65%) Python Developer
5 2 (11.76%) Business Analyst
5 2 (11.76%) Business Data Analyst
5 2 (11.76%) DevOps Engineer
6 1 (5.88%) Big Data Analyst
6 1 (5.88%) Cloud Developer
6 1 (5.88%) Data Business Analyst
6 1 (5.88%) MiFID Business Analyst
6 1 (5.88%) Operations Engineer
6 1 (5.88%) Technical Analyst
6 1 (5.88%) Technical Business Analyst
Libraries, Frameworks & Software Standards
1 2 (11.76%) NumPy
1 2 (11.76%) scikit-learn
2 1 (5.88%) .NET
2 1 (5.88%) FIX Protocol
2 1 (5.88%) FpML
2 1 (5.88%) ggplot
2 1 (5.88%) HTML
2 1 (5.88%) HTML5
2 1 (5.88%) Kafka
2 1 (5.88%) Matplotlib
2 1 (5.88%) MDX
2 1 (5.88%) MLlib
2 1 (5.88%) Natural Language Processing
2 1 (5.88%) Pandas
2 1 (5.88%) Seaborn
2 1 (5.88%) Web Services
Miscellaneous
1 6 (35.29%) Analytical Skills
2 3 (17.65%) Robotics
3 2 (11.76%) Blog
4 1 (5.88%) Algorithms
4 1 (5.88%) CMDB
4 1 (5.88%) Derivative
4 1 (5.88%) Fixed Income
4 1 (5.88%) Grid Computing
4 1 (5.88%) Market Risk
4 1 (5.88%) Public Cloud
Operating Systems
1 2 (11.76%) Linux
1 2 (11.76%) Mac OS X
1 2 (11.76%) Unix
Processes & Methodologies
1 5 (29.41%) Agile Software Development
1 5 (29.41%) Machine Learning
2 4 (23.53%) Analytics
2 4 (23.53%) Data Analysis
3 3 (17.65%) CRM
3 3 (17.65%) Data Architecture
3 3 (17.65%) Data Management
3 3 (17.65%) Data Modelling
3 3 (17.65%) ETL
3 3 (17.65%) Mentoring
3 3 (17.65%) Process Improvement
3 3 (17.65%) Stakeholder Engagement
3 3 (17.65%) Statistics
3 3 (17.65%) Visualisation
4 2 (11.76%) Change Management
4 2 (11.76%) Configuration Management
4 2 (11.76%) Data Cleansing
4 2 (11.76%) Data Visualisation
4 2 (11.76%) DevOps
4 2 (11.76%) Line Management
Programming Languages
1 10 (58.82%) Python
2 8 (47.06%) SQL
3 5 (29.41%) R
4 2 (11.76%) Java
5 1 (5.88%) C
5 1 (5.88%) C#
5 1 (5.88%) C++
5 1 (5.88%) Go
5 1 (5.88%) MATLAB
5 1 (5.88%) Scala
5 1 (5.88%) VBA
Qualifications
1 3 (17.65%) SC Cleared
1 3 (17.65%) Security Cleared
2 2 (11.76%) PhD
Quality Assurance & Compliance
1 5 (29.41%) Data Quality
2 1 (5.88%) MiFID
System Software
1 1 (5.88%) Docker
Systems Management
1 1 (5.88%) Kubernetes
Vendors
1 1 (5.88%) Tableau