Period
to 14 December 2018

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for HDFS skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited HDFS over the 6 months to 14 December 2018 with a comparison to the same period in the previous 2 years.

Hadoop Distributed File System (HDFS)
Central London > City of London
6 months to
14 Dec 2018
Same period 2017 Same period 2016
Rank 306 299 317
Rank change year-on-year -7 +18 +68
Permanent jobs citing HDFS 34 36 30
As % of all permanent IT jobs advertised in the City of London 0.32% 0.35% 0.26%
As % of the System Software category 1.97% 2.42% 2.28%
Number of salaries quoted 31 36 25
City of London median annual salary £75,000 £70,000 £100,000
Median salary % change year-on-year +7.14% -30.00% +42.86%
10th Percentile £52,500 £56,875 £58,750
90th Percentile £93,750 £111,875 £115,000
Central London median annual salary £75,000 £70,000 £87,500
% change year-on-year +7.14% -20.00% +25.00%

HDFS is in the System Software 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 system software skills.

All System Software Skills
City of London
Permanent vacancies with a requirement for system software skills 1,730 1,486 1,317
As % of all permanent IT jobs advertised in the City of London 16.23% 14.33% 11.62%
Number of salaries quoted 1,589 1,387 1,187
City of London median annual salary £60,000 £55,000 £52,500
Median salary % change year-on-year +9.09% +4.76% +10.53%
10th Percentile £29,500 £31,250 £28,500
90th Percentile £95,000 £87,500 £81,250
Central London median annual salary £60,000 £55,000 £50,000
% change year-on-year +9.09% +10.00% +6.38%

HDFS
Job Vacancy Trend in the City of London

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

Job vacancy trend for HDFS in the City of London

HDFS
Salary Trend in the City of London

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

Salary trend for HDFS in the City of London

HDFS
Salary Histogram in the City of London

The salary distribution of IT jobs citing HDFS in the City of London over the 6 months to 14 December 2018.

Salary histogram for HDFS in the City of London

For the 6 months to 14 December 2018, IT jobs citing HDFS also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the City of London region with a requirement for HDFS.

1 30 (88.24%) Big Data
2 29 (85.29%) Kafka
2 29 (85.29%) Hadoop
3 27 (79.41%) Finance
4 26 (76.47%) Java
5 23 (67.65%) Banking
6 21 (61.76%) Agile Software Development
7 18 (52.94%) Linux
7 18 (52.94%) Continuous Integration
8 17 (50.00%) Apache ZooKeeper
8 17 (50.00%) JavaScript
8 17 (50.00%) TDD
8 17 (50.00%) React
8 17 (50.00%) Java 8
9 16 (47.06%) Redis
9 16 (47.06%) Jenkins
9 16 (47.06%) GitHub
10 14 (41.18%) JAX-RS
10 14 (41.18%) Apache Avro
10 14 (41.18%) REST
10 14 (41.18%) Puppet
10 14 (41.18%) Apache Hive
10 14 (41.18%) Maven
10 14 (41.18%) Redux
10 14 (41.18%) Analytical Skills
10 14 (41.18%) Apache Spark
10 14 (41.18%) Flink
11 11 (32.35%) Scala
12 10 (29.41%) Apache Cassandra
12 10 (29.41%) HBase

HDFS
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 14 (41.18%) Apache Spark
2 3 (8.82%) Apache
2 3 (8.82%) Apache Solr
2 3 (8.82%) Elasticsearch
2 3 (8.82%) SAS
Cloud Services
1 16 (47.06%) GitHub
2 9 (26.47%) Amazon AWS
3 7 (20.59%) Microsoft Azure
4 4 (11.76%) Amazon EC2
4 4 (11.76%) Amazon EMR
5 3 (8.82%) Azure Machine Learning
6 1 (2.94%) Amazon Kinesis
Communications & Networking
1 4 (11.76%) Firewall
1 4 (11.76%) Kerberos
1 4 (11.76%) SSL
2 3 (8.82%) TCP/IP
2 3 (8.82%) VPN
3 2 (5.88%) VLAN
Database & Business Intelligence
1 30 (88.24%) Big Data
2 29 (85.29%) Hadoop
3 16 (47.06%) Redis
4 14 (41.18%) Apache Hive
4 14 (41.18%) Flink
5 10 (29.41%) Apache Cassandra
5 10 (29.41%) HBase
6 5 (14.71%) Sqoop
7 4 (11.76%) Amazon Redshift
7 4 (11.76%) MariaDB
7 4 (11.76%) NoSQL
7 4 (11.76%) Scylla
7 4 (11.76%) Spark SQL
8 3 (8.82%) Data Warehouse
8 3 (8.82%) MongoDB
8 3 (8.82%) MySQL
8 3 (8.82%) Parquet
8 3 (8.82%) PostgreSQL
8 3 (8.82%) Spotfire
8 3 (8.82%) SQL Server
Development Applications
1 16 (47.06%) Jenkins
2 14 (41.18%) Maven
3 2 (5.88%) Hudson
4 1 (2.94%) JUnit
General
1 27 (79.41%) Finance
2 23 (67.65%) Banking
3 3 (8.82%) Telecoms
4 1 (2.94%) Retail
Job Titles
1 21 (61.76%) Developer
2 18 (52.94%) Big Data Developer
3 16 (47.06%) Java Developer
4 14 (41.18%) Core Java Developer
5 5 (14.71%) Senior Developer
6 4 (11.76%) Data Engineer
7 3 (8.82%) .NET Developer
7 3 (8.82%) AWS Developer
7 3 (8.82%) Big Data Engineer
7 3 (8.82%) Big Data Manager
7 3 (8.82%) C# .NET Developer
7 3 (8.82%) C# Developer
7 3 (8.82%) Data Manager
7 3 (8.82%) F# Developer
7 3 (8.82%) Ruby Developer
7 3 (8.82%) Scala Developer
7 3 (8.82%) Senior .NET Developer
7 3 (8.82%) Senior C# .NET Developer
7 3 (8.82%) Senior C# Developer
7 3 (8.82%) Senior Scala Developer
Libraries, Frameworks & Software Standards
1 29 (85.29%) Kafka
2 17 (50.00%) React
3 14 (41.18%) Apache Avro
3 14 (41.18%) JAX-RS
3 14 (41.18%) Redux
3 14 (41.18%) REST
4 4 (11.76%) LDAP
4 4 (11.76%) Natural Language Processing
5 3 (8.82%) .NET
5 3 (8.82%) AngularJS
5 3 (8.82%) Apache Thrift
5 3 (8.82%) ASP.NET
5 3 (8.82%) ASP.NET MVC
5 3 (8.82%) ASP.NET Web API
5 3 (8.82%) Elastic Stack
5 3 (8.82%) PostGIS
5 3 (8.82%) Protocol Buffers
5 3 (8.82%) RabbitMQ
5 3 (8.82%) Samza
6 2 (5.88%) Spark Streaming
Miscellaneous
1 14 (41.18%) Analytical Skills
2 7 (20.59%) Fintech
3 1 (2.94%) Algorithms
3 1 (2.94%) Derivative
3 1 (2.94%) Greenfield Project
3 1 (2.94%) Life Science
3 1 (2.94%) Management Information System
3 1 (2.94%) Social Network
Operating Systems
1 18 (52.94%) Linux
2 4 (11.76%) CentOS
2 4 (11.76%) Red Hat Enterprise Linux
2 4 (11.76%) Unix
Processes & Methodologies
1 21 (61.76%) Agile Software Development
2 18 (52.94%) Continuous Integration
3 17 (50.00%) TDD
4 9 (26.47%) Open Source
5 7 (20.59%) Machine Learning
6 6 (17.65%) Analytics
6 6 (17.65%) Data Science
7 5 (14.71%) DevOps
8 4 (11.76%) Change Management
8 4 (11.76%) Data Engineering
8 4 (11.76%) ITIL
9 3 (8.82%) Data Governance
9 3 (8.82%) Data Ingestion
9 3 (8.82%) Data Modelling
9 3 (8.82%) Data Security
9 3 (8.82%) E-Commerce
9 3 (8.82%) ETL
9 3 (8.82%) MVC
9 3 (8.82%) OOP
9 3 (8.82%) Service Delivery
Programming Languages
1 26 (76.47%) Java
2 17 (50.00%) Java 8
2 17 (50.00%) JavaScript
3 11 (32.35%) Scala
4 10 (29.41%) Python
5 8 (23.53%) SQL
6 3 (8.82%) C#
6 3 (8.82%) CoffeeScript
6 3 (8.82%) F#
6 3 (8.82%) Ruby
7 2 (5.88%) Shell Script
8 1 (2.94%) C++
8 1 (2.94%) Julia
8 1 (2.94%) R
Qualifications
1 1 (2.94%) PhD
System Software
1 17 (50.00%) Apache ZooKeeper
2 5 (14.71%) Docker
3 2 (5.88%) Apache Flume
4 1 (2.94%) Active Directory
Systems Management
1 14 (41.18%) Puppet
2 8 (23.53%) Oozie
3 4 (11.76%) Kibana
3 4 (11.76%) logstash
4 3 (8.82%) Graphite
4 3 (8.82%) Mesos
5 2 (5.88%) Grafana
5 2 (5.88%) Kubernetes
5 2 (5.88%) Prometheus
Vendors
1 7 (20.59%) Hortonworks
2 5 (14.71%) Google
3 4 (11.76%) Microsoft
4 3 (8.82%) IBM
4 3 (8.82%) Tableau
5 2 (5.88%) Cloudera
5 2 (5.88%) Oracle