The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for MapReduce skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited MapReduce over the 3 months to 30 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.

MapReduce
London / City of London
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 130 150 182
Rank change year-on-year +20 +32  
Contract jobs citing MapReduce 21 13 14
As % of all contract IT jobs advertised in the City of London 0.68% 0.38% 0.27%
As % of the Processes & Methodologies category 0.79% 0.44% 0.33%
Number of daily rates quoted 18 10 14
Median daily rate £650 £531 £501
Median daily rate % change year-on-year +22.35% +5.98%  
UK excluding London median daily rate £513 £450 £500
% change year-on-year +13.88% -10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

MapReduce is in the process and methodology 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 process and methodology skills.

Contract Process & Methodology Skills
City of London
Contract job vacancies with a requirement for process and methodology skills 2657 2978 4235
As % of all contract IT job vacancies advertised in the City of London 85.65% 87.49% 82.43%
Number of daily rates quoted 2076 2386 3276
Median daily rate £500 £475 £450
Median daily rate % change year-on-year +5.26% +5.55%  
90% offered a daily rate of more than £340 £325 £320
10% offered a daily rate of more than £625 £625 £625
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 23 29 34
Median hourly rate £16.00 £21.78 £20.45
Median hourly rate % change year-on-year -26.53% +6.52%  
90% offered a hourly rate of more than £13.50 £13.00 £12.50
10% offered a hourly rate of more than £28.35 £47.50 £92.50
UK excluding London median hourly rate £35.75 £38.00 £30.00
% change year-on-year -5.92% +26.66%  

MapReduce
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing MapReduce as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for MapReduce in the City of London

MapReduce
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 MapReduce in the City of London.

Contractor daily rate trend for MapReduce in the City of London

MapReduce
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing MapReduce in the City of London over the 3 months to 30 March 2017.

Contractor daily rate histogram for MapReduce in the City of London

For the 6 months to 30 March 2017, IT contractor jobs citing MapReduce 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 MapReduce.

1 31 (81.58%) Java
2 23 (60.53%) Big Data
3 22 (57.89%) Hadoop
4 21 (55.26%) Banking
5 20 (52.63%) Finance
5 20 (52.63%) Apache Spark
6 19 (50.00%) Apache Hive
7 17 (44.74%) Front Office
7 17 (44.74%) Unix
7 17 (44.74%) Spring
8 15 (39.47%) HBase
8 15 (39.47%) Oracle
9 14 (36.84%) Hibernate
9 14 (36.84%) Python
9 14 (36.84%) Investment Banking
9 14 (36.84%) Oracle Coherence
9 14 (36.84%) Multithreading
9 14 (36.84%) Low Latency
10 13 (34.21%) Apache Pig
11 12 (31.58%) NoSQL
12 10 (26.32%) Hadoop YARN
12 10 (26.32%) HDFS
13 9 (23.68%) Relational Database
13 9 (23.68%) Sqoop
13 9 (23.68%) Scala
14 8 (21.05%) MongoDB
14 8 (21.05%) Hortonworks
14 8 (21.05%) Agile Software Development
14 8 (21.05%) Algorithms
15 7 (18.42%) Kafka

MapReduce
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 20 (52.63%) Apache Spark
2 14 (36.84%) Oracle Coherence
3 13 (34.21%) Apache Pig
4 7 (18.42%) Apache
5 4 (10.53%) Apache Solr
6 3 (7.89%) GemFire
7 2 (5.26%) Elasticsearch
Business Applications
1 1 (2.63%) SAP Oil and Gas
Cloud Services
1 6 (15.79%) Amazon AWS
2 3 (7.89%) Amazon EMR
3 2 (5.26%) Microsoft Azure
Communications & Networking
1 2 (5.26%) Kerberos
2 1 (2.63%) HTTP
2 1 (2.63%) LDAP
2 1 (2.63%) SSL
2 1 (2.63%) TCP/IP
Database & Business Intelligence
1 23 (60.53%) Big Data
2 22 (57.89%) Hadoop
3 19 (50.00%) Apache Hive
4 15 (39.47%) HBase
5 12 (31.58%) NoSQL
6 9 (23.68%) Relational Database
6 9 (23.68%) Sqoop
7 8 (21.05%) MongoDB
8 7 (18.42%) Apache Cassandra
9 6 (15.79%) RDBMS
10 5 (13.16%) Data Lake
10 5 (13.16%) Flink
10 5 (13.16%) PostgreSQL
11 3 (7.89%) Neo4j
11 3 (7.89%) SQL Server
12 2 (5.26%) Data Warehouse
13 1 (2.63%) Cloudera CDH
13 1 (2.63%) DB2
13 1 (2.63%) QlikView
13 1 (2.63%) Text Mining
Development Applications
1 3 (7.89%) JUnit
2 2 (5.26%) Git (software)
2 2 (5.26%) Jenkins
2 2 (5.26%) Maven
2 2 (5.26%) Mockito
2 2 (5.26%) Talend Open Studio
3 1 (2.63%) Ant
3 1 (2.63%) Eclipse
3 1 (2.63%) Gradle
3 1 (2.63%) Hudson
3 1 (2.63%) Subversion
3 1 (2.63%) Team Foundation Server
3 1 (2.63%) TeamCity
General
1 21 (55.26%) Banking
2 20 (52.63%) Finance
3 17 (44.74%) Front Office
4 14 (36.84%) Investment Banking
5 3 (7.89%) Marketing
6 2 (5.26%) Retail
7 1 (2.63%) Advertising
7 1 (2.63%) Electronics
7 1 (2.63%) Manufacturing
7 1 (2.63%) Telecoms
Job Titles
1 20 (52.63%) Developer
2 18 (47.37%) Java Developer
3 15 (39.47%) Senior Developer
3 15 (39.47%) Senior Java Developer
4 6 (15.79%) Architect
4 6 (15.79%) Data Engineer
5 5 (13.16%) Big Data Architect
5 5 (13.16%) Big Data Engineer
5 5 (13.16%) Data Architect
5 5 (13.16%) Front Office Developer
6 4 (10.53%) Hadoop Architect
7 3 (7.89%) Analyst
7 3 (7.89%) AWS Architect
7 3 (7.89%) Hadoop Developer
7 3 (7.89%) Technical Analyst
8 2 (5.26%) Big Data Developer
8 2 (5.26%) Java Engineer
8 2 (5.26%) Java Hadoop Developer
8 2 (5.26%) Technical Leader
9 1 (2.63%) Lead DevOps
Libraries, Frameworks & Software Standards
1 17 (44.74%) Spring
2 14 (36.84%) Hibernate
3 7 (18.42%) Kafka
3 7 (18.42%) Web Services
4 5 (13.16%) Akka
5 2 (5.26%) AngularJS
5 2 (5.26%) Cascading
5 2 (5.26%) Drools
5 2 (5.26%) HTML
5 2 (5.26%) JSON
5 2 (5.26%) REST
5 2 (5.26%) RESTful
6 1 (2.63%) .NET
6 1 (2.63%) CSS
6 1 (2.63%) EJB
6 1 (2.63%) Java EE
6 1 (2.63%) JMS
6 1 (2.63%) SOAP
6 1 (2.63%) XML
6 1 (2.63%) XSLT
Miscellaneous
1 8 (21.05%) Algorithms
2 2 (5.26%) Computer Science
3 1 (2.63%) Clustering
Operating Systems
1 17 (44.74%) Unix
2 6 (15.79%) Linux
3 1 (2.63%) Red Hat Enterprise Linux
3 1 (2.63%) Windows
Processes & Methodologies
1 14 (36.84%) Low Latency
1 14 (36.84%) Multithreading
2 8 (21.05%) Agile Software Development
3 7 (18.42%) Machine Learning
4 6 (15.79%) Analytics
4 6 (15.79%) Open Source
5 5 (13.16%) ETL
6 4 (10.53%) Data Engineering
6 4 (10.53%) Statistics
6 4 (10.53%) TDD
7 3 (7.89%) Configuration Management
7 3 (7.89%) Electronic Trading
7 3 (7.89%) Mathematics
8 2 (5.26%) Business Intelligence
8 2 (5.26%) Continuous Integration
8 2 (5.26%) Data Analytics
8 2 (5.26%) DevOps
8 2 (5.26%) Search Engine Marketing
8 2 (5.26%) Security Monitoring
8 2 (5.26%) Unit Testing
Programming Languages
1 31 (81.58%) Java
2 14 (36.84%) Python
3 9 (23.68%) Scala
4 4 (10.53%) MATLAB
4 4 (10.53%) R
5 3 (7.89%) Bash Shell
5 3 (7.89%) Perl
5 3 (7.89%) SQL
6 2 (5.26%) C#
6 2 (5.26%) C++
7 1 (2.63%) JavaScript
7 1 (2.63%) Shell Script
7 1 (2.63%) VB.NET
Qualifications
1 4 (10.53%) Degree
1 4 (10.53%) PhD
2 1 (2.63%) DV Cleared
2 1 (2.63%) Security Cleared
Quality Assurance & Compliance
1 2 (5.26%) QA
System Software
1 10 (26.32%) HDFS
2 4 (10.53%) Apache Flume
3 1 (2.63%) Apache ZooKeeper
Systems Management
1 10 (26.32%) Hadoop YARN
2 6 (15.79%) Oozie
3 2 (5.26%) Opscode Chef
3 2 (5.26%) Puppet
4 1 (2.63%) Ambari
4 1 (2.63%) Ansible
4 1 (2.63%) Terraform
Vendors
1 15 (39.47%) Oracle
2 8 (21.05%) Hortonworks
3 4 (10.53%) Microsoft
3 4 (10.53%) Tableau
4 2 (5.26%) MapR
4 2 (5.26%) Talend
4 2 (5.26%) Teradata
5 1 (2.63%) Cloudera
5 1 (2.63%) MicroStrategy
5 1 (2.63%) Red Hat
5 1 (2.63%) SAP