Period
to 21 November 2017

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for MapReduce skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited MapReduce over the 6 months to 21 November 2017 with a comparison to the same period in the previous 2 years.

MapReduce
Central London > City of London
6 months to
21 Nov 2017
Same period 2016 Same period 2015
Rank 290 299 332
Rank change year-on-year +9 +33 +63
Permanent jobs citing MapReduce 32 51 82
As % of all permanent IT jobs advertised in the City of London 0.31% 0.44% 0.48%
As % of the Processes & Methodologies category 0.35% 0.49% 0.54%
Number of salaries quoted 31 50 72
City of London median annual salary £70,000 £88,750 £75,000
Median salary % change year-on-year -21.13% +18.33% +15.38%
10th Percentile £63,750 £57,375 £38,525
90th Percentile £113,750 £115,000 £93,750
Central London median annual salary £70,000 £82,500 £75,000
% change year-on-year -15.15% +10.00% +20.00%

MapReduce is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for process or methodology skills.

All Process and Methodology Skills
City of London
Permanent vacancies with a requirement for process or methodology skills 9247 10392 15168
As % of all permanent IT jobs advertised in the City of London 90.08% 89.44% 89.12%
Number of salaries quoted 8347 9474 13149
City of London median annual salary £60,000 £60,000 £57,500
Median salary % change year-on-year - +4.35% +4.55%
10th Percentile £36,250 £35,000 £33,750
90th Percentile £93,750 £90,000 £87,500
Central London median annual salary £60,000 £57,500 £57,500
% change year-on-year +4.35% - +4.55%

MapReduce
Job Vacancy Trend in the City of London

Job postings citing MapReduce as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for MapReduce in the City of London

MapReduce
Salary Trend in the City of London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing MapReduce in the City of London.

Salary trend for MapReduce in the City of London

MapReduce
Salary Histogram in the City of London

The salary distribution of IT jobs citing MapReduce in the City of London over the 6 months to 21 November 2017.

Salary histogram for MapReduce in the City of London

For the 6 months to 21 November 2017, IT jobs citing MapReduce also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the City of London region with a requirement for MapReduce.

1 31 (96.88%) Hadoop
2 22 (68.75%) Big Data
3 21 (65.63%) NoSQL
4 20 (62.50%) HDFS
5 17 (53.13%) SQL
6 16 (50.00%) ETL
7 15 (46.88%) SQL Server
7 15 (46.88%) Subversion
8 14 (43.75%) SQL Server Integration Services
8 14 (43.75%) T-SQL
8 14 (43.75%) Analytics
8 14 (43.75%) SQL Server Management Studio (SSMS)
8 14 (43.75%) RStudio
9 13 (40.63%) Apache Spark
10 12 (37.50%) Apache Hive
11 11 (34.38%) Java
12 10 (31.25%) Finance
12 10 (31.25%) Sqoop
13 9 (28.13%) Apache Pig
13 9 (28.13%) R
13 9 (28.13%) SQL Server Reporting Services
13 9 (28.13%) SQL Server Analysis Services
14 8 (25.00%) Business Intelligence
14 8 (25.00%) MongoDB
14 8 (25.00%) Data Quality
14 8 (25.00%) HBase
15 7 (21.88%) Apache Flume
15 7 (21.88%) Data Management
16 6 (18.75%) Migration
16 6 (18.75%) Python

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 13 (40.63%) Apache Spark
2 9 (28.13%) Apache Pig
3 4 (12.50%) Apache
4 3 (9.38%) Apache Solr
4 3 (9.38%) SAS
5 1 (3.13%) Jupyter
Applications
1 2 (6.25%) SPSS
Cloud Services
1 4 (12.50%) Amazon AWS
2 2 (6.25%) Amazon EC2
2 2 (6.25%) Amazon EMR
2 2 (6.25%) Cloud Computing
3 1 (3.13%) Microsoft Azure
Database & Business Intelligence
1 31 (96.88%) Hadoop
2 22 (68.75%) Big Data
3 21 (65.63%) NoSQL
4 15 (46.88%) SQL Server
5 14 (43.75%) SQL Server Integration Services
6 12 (37.50%) Apache Hive
7 10 (31.25%) Sqoop
8 9 (28.13%) SQL Server Analysis Services
8 9 (28.13%) SQL Server Reporting Services
9 8 (25.00%) HBase
9 8 (25.00%) MongoDB
10 5 (15.63%) Apache Cassandra
11 4 (12.50%) RDBMS
11 4 (12.50%) Relational Database
12 3 (9.38%) Power BI
13 2 (6.25%) Data Lake
13 2 (6.25%) Impala
13 2 (6.25%) QlikView
13 2 (6.25%) Spotfire
13 2 (6.25%) Triplestore
Development Applications
1 15 (46.88%) Subversion
2 14 (43.75%) RStudio
2 14 (43.75%) SQL Server Management Studio (SSMS)
3 2 (6.25%) Git (software)
3 2 (6.25%) Jenkins
4 1 (3.13%) Gerrit
4 1 (3.13%) Grunt
4 1 (3.13%) Jasmine
4 1 (3.13%) Maven
4 1 (3.13%) Mercurial
4 1 (3.13%) Selenium
4 1 (3.13%) Travis CI
General
1 10 (31.25%) Finance
2 4 (12.50%) Banking
2 4 (12.50%) Retail
3 1 (3.13%) Marketing
Job Titles
1 14 (43.75%) Data Manager
2 5 (15.63%) Big Data Engineer
2 5 (15.63%) Commercial Manager
2 5 (15.63%) Data Engineer
2 5 (15.63%) Data Quality Manager
2 5 (15.63%) Quality Manager
2 5 (15.63%) Strategy Manager
3 3 (9.38%) Developer
4 2 (6.25%) Analytics Manager
4 2 (6.25%) Architect
4 2 (6.25%) Data Analytics Manager
4 2 (6.25%) Data Architect
4 2 (6.25%) E-Commerce Director
4 2 (6.25%) Hadoop Developer
4 2 (6.25%) Lead Architect
4 2 (6.25%) Lead Data Architect
4 2 (6.25%) Lead Solutions Architect
4 2 (6.25%) Senior Analytics Manager
4 2 (6.25%) Senior Manager
4 2 (6.25%) Solutions Architect
Libraries, Frameworks & Software Standards
1 5 (15.63%) Kafka
2 2 (6.25%) Apache Avro
2 2 (6.25%) Node.js
2 2 (6.25%) NumPy
2 2 (6.25%) Web Services
3 1 (3.13%) AngularJS
3 1 (3.13%) D3.js
3 1 (3.13%) GraphX
3 1 (3.13%) JMS
3 1 (3.13%) JSON
3 1 (3.13%) Matplotlib
3 1 (3.13%) MLlib
3 1 (3.13%) Natural Language Processing
3 1 (3.13%) Pandas
3 1 (3.13%) PySpark
3 1 (3.13%) REST
3 1 (3.13%) scikit-learn
3 1 (3.13%) SciPy
3 1 (3.13%) TensorFlow
3 1 (3.13%) XML
Miscellaneous
1 6 (18.75%) Analytical Skills
2 5 (15.63%) Data Structures
3 3 (9.38%) Virtual Team
4 2 (6.25%) Taxonomies
5 1 (3.13%) Algorithms
5 1 (3.13%) Computer Science
5 1 (3.13%) Fintech
5 1 (3.13%) Greenfield Project
Operating Systems
1 6 (18.75%) Linux
2 3 (9.38%) Mac OS X
2 3 (9.38%) Windows
Processes & Methodologies
1 16 (50.00%) ETL
2 14 (43.75%) Analytics
3 8 (25.00%) Business Intelligence
4 7 (21.88%) Data Management
5 6 (18.75%) Migration
5 6 (18.75%) Open Source
6 5 (15.63%) Data Architecture
7 3 (9.38%) Agile Software Development
7 3 (9.38%) Mathematics
7 3 (9.38%) Open Source Development
8 2 (6.25%) Concurrent Programming
8 2 (6.25%) Line Management
8 2 (6.25%) Master Data Management
8 2 (6.25%) Matrix Organization
8 2 (6.25%) Performance Tuning
8 2 (6.25%) Quality Management
8 2 (6.25%) Stakeholder Management
8 2 (6.25%) Statistics
8 2 (6.25%) TDD
8 2 (6.25%) Virtual Team Management
Programming Languages
1 17 (53.13%) SQL
2 14 (43.75%) T-SQL
3 11 (34.38%) Java
4 9 (28.13%) R
5 6 (18.75%) C
5 6 (18.75%) Python
6 3 (9.38%) Scala
7 2 (6.25%) Perl
7 2 (6.25%) PHP
8 1 (3.13%) C#
8 1 (3.13%) C++
8 1 (3.13%) HiveQL
8 1 (3.13%) JavaScript
8 1 (3.13%) MATLAB
Qualifications
1 4 (12.50%) DV Cleared
1 4 (12.50%) Security Cleared
2 2 (6.25%) Degree
3 1 (3.13%) Computer Science Degree
Quality Assurance & Compliance
1 8 (25.00%) Data Quality
2 2 (6.25%) GDPR
System Software
1 20 (62.50%) HDFS
2 7 (21.88%) Apache Flume
3 1 (3.13%) Apache ZooKeeper
Systems Management
1 2 (6.25%) Oozie
1 2 (6.25%) Opscode Chef
2 1 (3.13%) Hadoop YARN
2 1 (3.13%) Puppet
Vendors
1 3 (9.38%) Cloudera
1 3 (9.38%) Tableau
2 1 (3.13%) Google
2 1 (3.13%) Hortonworks
2 1 (3.13%) Oracle
2 1 (3.13%) Vertica