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 25 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.

MapReduce
London / City of London
3 months to
25 Jun 2017
Same period 2016 Same period 2015
Rank 147 164 182
Rank change year-on-year +17 +18  
Contract jobs citing MapReduce 16 2 20
As % of all contract IT jobs advertised in the City of London 0.49% 0.060% 0.34%
As % of the Processes & Methodologies category 0.55% 0.070% 0.42%
Number of daily rates quoted 15 2 20
Median daily rate £550 £588 £535
Median daily rate % change year-on-year -6.38% +9.81%  
90% offered a daily rate of more than £416 £498 £423
10% offered a daily rate of more than £715 £678 £600
UK excluding London median daily rate £400 £420 £425
% change year-on-year -4.76% -1.17%  
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 2887 2854 4724
As % of all contract IT job vacancies advertised in the City of London 88.15% 85.89% 81.15%
Number of daily rates quoted 2218 2339 3709
Median daily rate £500 £475 £470
Median daily rate % change year-on-year +5.26% +1.06%  
90% offered a daily rate of more than £350 £335 £325
10% offered a daily rate of more than £650 £625 £625
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 23 23 57
Median hourly rate £20.00 £19.00 £24.50
Median hourly rate % change year-on-year +5.26% -22.44%  
90% offered a hourly rate of more than £14.75 £12.50 £14.90
10% offered a hourly rate of more than £41.00 £35.20 £55.50
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

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 25 June 2017.

Contractor daily rate histogram for MapReduce in the City of London

For the 6 months to 25 June 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 30 (83.33%) Java
2 22 (61.11%) Finance
3 20 (55.56%) Unix
3 20 (55.56%) Hadoop
3 20 (55.56%) Big Data
4 16 (44.44%) Oracle
4 16 (44.44%) Spring
5 15 (41.67%) Banking
5 15 (41.67%) Apache Spark
6 14 (38.89%) Low Latency
6 14 (38.89%) Investment Banking
6 14 (38.89%) Front Office
6 14 (38.89%) Hibernate
6 14 (38.89%) Python
6 14 (38.89%) Oracle Coherence
6 14 (38.89%) Multithreading
7 13 (36.11%) HDFS
8 12 (33.33%) Apache Hive
8 12 (33.33%) HBase
9 11 (30.56%) Agile Software Development
10 8 (22.22%) Apache Pig
10 8 (22.22%) Sqoop
11 7 (19.44%) NoSQL
12 6 (16.67%) Apache Cassandra
12 6 (16.67%) ETL
12 6 (16.67%) C#
12 6 (16.67%) Analytics
12 6 (16.67%) Hadoop YARN
13 5 (13.89%) SDLC
13 5 (13.89%) Elasticsearch

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 15 (41.67%) Apache Spark
2 14 (38.89%) Oracle Coherence
3 8 (22.22%) Apache Pig
4 5 (13.89%) Apache Solr
4 5 (13.89%) Elasticsearch
5 3 (8.33%) Apache
5 3 (8.33%) GemFire
6 2 (5.56%) Oracle SOA Suite
7 1 (2.78%) Confluence
7 1 (2.78%) Jupyter
Cloud Services
1 2 (5.56%) Amazon AWS
1 2 (5.56%) Amazon EMR
2 1 (2.78%) Microsoft Azure
Communications & Networking
1 1 (2.78%) HTTP
1 1 (2.78%) Kerberos
1 1 (2.78%) SSL
1 1 (2.78%) TCP/IP
Database & Business Intelligence
1 20 (55.56%) Big Data
1 20 (55.56%) Hadoop
2 12 (33.33%) Apache Hive
2 12 (33.33%) HBase
3 8 (22.22%) Sqoop
4 7 (19.44%) NoSQL
5 6 (16.67%) Apache Cassandra
6 5 (13.89%) MongoDB
7 3 (8.33%) RDBMS
7 3 (8.33%) Relational Database
8 2 (5.56%) IBM BigInsights
8 2 (5.56%) Impala
8 2 (5.56%) Oracle Database
8 2 (5.56%) Oracle Database 11g
8 2 (5.56%) PostgreSQL
9 1 (2.78%) BusinessObjects
9 1 (2.78%) DataStage
9 1 (2.78%) Neo4j
9 1 (2.78%) Pentaho
9 1 (2.78%) Redis
Development Applications
1 5 (13.89%) Git (software)
1 5 (13.89%) Jenkins
2 2 (5.56%) Subversion
3 1 (2.78%) JIRA
3 1 (2.78%) JUnit
3 1 (2.78%) Mercurial
3 1 (2.78%) Team Foundation Server
3 1 (2.78%) TeamCity
3 1 (2.78%) Travis CI
General
1 22 (61.11%) Finance
2 15 (41.67%) Banking
3 14 (38.89%) Front Office
3 14 (38.89%) Investment Banking
4 1 (2.78%) Back Office
4 1 (2.78%) Marketing
4 1 (2.78%) Retail
Job Titles
1 21 (58.33%) Developer
2 16 (44.44%) Java Developer
3 14 (38.89%) Senior Developer
3 14 (38.89%) Senior Java Developer
4 6 (16.67%) Architect
5 5 (13.89%) Big Data Engineer
5 5 (13.89%) Data Engineer
5 5 (13.89%) Front Office Developer
6 4 (11.11%) Big Data Architect
6 4 (11.11%) Big Data Developer
6 4 (11.11%) Data Architect
6 4 (11.11%) Solutions Architect
7 2 (5.56%) AWS Architect
7 2 (5.56%) Hadoop Architect
8 1 (2.78%) Data Scientist
8 1 (2.78%) Hadoop Administrator
8 1 (2.78%) Hadoop Developer
8 1 (2.78%) Java Pricing Developer
8 1 (2.78%) Senior Data Engineer
8 1 (2.78%) Senior Data Scientist
Libraries, Frameworks & Software Standards
1 16 (44.44%) Spring
2 14 (38.89%) Hibernate
3 5 (13.89%) Kafka
4 4 (11.11%) JSON
5 3 (8.33%) RabbitMQ
5 3 (8.33%) RESTful
5 3 (8.33%) Web Services
6 2 (5.56%) Apache Tez
6 2 (5.56%) Java EE
6 2 (5.56%) REST
7 1 (2.78%) Bokeh
7 1 (2.78%) Django
7 1 (2.78%) Flask
7 1 (2.78%) ggplot
7 1 (2.78%) GraphX
7 1 (2.78%) Matplotlib
7 1 (2.78%) PySpark
7 1 (2.78%) scikit-learn
7 1 (2.78%) Seaborn
7 1 (2.78%) TensorFlow
Miscellaneous
1 5 (13.89%) Greenfield Project
2 2 (5.56%) Algorithms
3 1 (2.78%) Computer Science
3 1 (2.78%) Equities
3 1 (2.78%) Foreign Exchange (FX)
3 1 (2.78%) Hedge funds
3 1 (2.78%) Market Risk
3 1 (2.78%) Virtual Team
Operating Systems
1 20 (55.56%) Unix
2 4 (11.11%) Linux
Processes & Methodologies
1 14 (38.89%) Low Latency
1 14 (38.89%) Multithreading
2 11 (30.56%) Agile Software Development
3 6 (16.67%) Analytics
3 6 (16.67%) ETL
4 5 (13.89%) Machine Learning
4 5 (13.89%) SDLC
4 5 (13.89%) TDD
5 4 (11.11%) Data Architecture
5 4 (11.11%) Data Engineering
5 4 (11.11%) DevOps
6 3 (8.33%) Electronic Trading
6 3 (8.33%) Software Delivery
7 2 (5.56%) Continuous Integration
7 2 (5.56%) Data Integration
7 2 (5.56%) Enterprise Architecture
7 2 (5.56%) Load Testing
7 2 (5.56%) Parallel Computing
7 2 (5.56%) System Testing
7 2 (5.56%) TOGAF
Programming Languages
1 30 (83.33%) Java
2 14 (38.89%) Python
3 6 (16.67%) C#
4 3 (8.33%) JavaScript
4 3 (8.33%) R
4 3 (8.33%) Scala
4 3 (8.33%) Shell Script
4 3 (8.33%) SQL
5 2 (5.56%) Bash Shell
6 1 (2.78%) C++
6 1 (2.78%) MATLAB
6 1 (2.78%) Perl
Qualifications
1 1 (2.78%) Degree
Quality Assurance & Compliance
1 1 (2.78%) QA
System Software
1 13 (36.11%) HDFS
2 4 (11.11%) Apache ZooKeeper
3 3 (8.33%) Apache Flume
Systems Management
1 6 (16.67%) Hadoop YARN
2 3 (8.33%) Ansible
3 2 (5.56%) Oozie
4 1 (2.78%) Ambari
4 1 (2.78%) Terraform
Vendors
1 16 (44.44%) Oracle
2 3 (8.33%) Microsoft
3 2 (5.56%) Hortonworks
4 1 (2.78%) Ab Initio
4 1 (2.78%) Cloudera
4 1 (2.78%) Informatica
4 1 (2.78%) MapR