Period
to 16 November 2019

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for HDFS skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited HDFS over the 6 months to 16 November 2019 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.

Hadoop Distributed File System (HDFS)
Central London > City of London
6 months to
16 Nov 2019
Same period 2018 Same period 2017
Rank 205 215 186
Rank change year-on-year +10 -29 +30
Contract jobs citing HDFS 14 39 73
As % of all contract IT jobs advertised in the City of London 0.24% 0.55% 1.02%
As % of the System Software category 1.46% 3.22% 8.68%
Number of daily rates quoted 11 36 67
City of London median daily rate £650 £550 £625
Median daily rate % change year-on-year +18.18% -12.00% -3.85%
10th Percentile £463 £513 £525
90th Percentile £700 £650 £725
Central London median daily rate £619 £550 £625
% change year-on-year +12.50% -12.00% -3.85%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

HDFS is in the System Software category. The following 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 system software skills.

All System Software Skills
City of London
Contract vacancies with a requirement for system software skills 957 1,212 841
As % of all contract IT jobs advertised in the City of London 16.40% 17.23% 11.80%
Number of daily rates quoted 777 972 682
City of London median daily rate £515 £500 £488
Median daily rate % change year-on-year +3.00% +2.56% +8.33%
10th Percentile £214 £163 £201
90th Percentile £650 £650 £650
Central London median daily rate £500 £500 £475
% change year-on-year - +5.26% +5.56%
Number of hourly rates quoted 20 36 22
City of London median hourly rate £20.42 £19.25 £17.00
Median hourly rate % change year-on-year +6.05% +13.24% -10.53%
10th Percentile £12.76 £14.06 £10.60
90th Percentile £33.03 £25.50 £27.33
Central London median hourly rate £20.00 £19.25 £17.00
% change year-on-year +3.90% +13.24% -10.53%

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
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 HDFS in the City of London.

Contractor daily rate trend for HDFS in the City of London

HDFS
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing HDFS in the City of London over the 6 months to 16 November 2019.

Contractor daily rate histogram for HDFS in the City of London

For the 6 months to 16 November 2019, IT contractor 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 contract job ads across the City of London region with a requirement for HDFS.

1 14 (100.00%) Hadoop
1 14 (100.00%) Apache Spark
2 12 (85.71%) Python
3 10 (71.43%) Apache Hive
4 9 (64.29%) Java
4 9 (64.29%) SQL
5 8 (57.14%) Agile Software Development
5 8 (57.14%) Hadoop YARN
6 7 (50.00%) Impala
6 7 (50.00%) Scala
7 6 (42.86%) Cloudera
7 6 (42.86%) Amazon S3
7 6 (42.86%) Finance
7 6 (42.86%) JIRA
8 5 (35.71%) TDD
8 5 (35.71%) Data Modelling
8 5 (35.71%) Performance Testing
8 5 (35.71%) HBase
8 5 (35.71%) R
8 5 (35.71%) Jenkins
8 5 (35.71%) DevOps
8 5 (35.71%) Data Lake
8 5 (35.71%) Data Science
8 5 (35.71%) PySpark
9 4 (28.57%) Linux Command Line
9 4 (28.57%) Data Ingestion
9 4 (28.57%) Travis CI
9 4 (28.57%) Performance Optimisation
9 4 (28.57%) Amazon EMR
9 4 (28.57%) Functional Programming

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 (100.00%) Apache Spark
2 3 (21.43%) Jupyter
3 2 (14.29%) Confluence
Applications
1 1 (7.14%) Microsoft Excel
Cloud Services
1 6 (42.86%) Amazon S3
2 4 (28.57%) Amazon EMR
2 4 (28.57%) AWS
3 3 (21.43%) Amazon Kinesis
4 2 (14.29%) Amazon CloudWatch
4 2 (14.29%) AWS CloudFormation
4 2 (14.29%) AWS CloudTrail
4 2 (14.29%) AWS Lambda
4 2 (14.29%) AWS Step Functions
4 2 (14.29%) GCP
4 2 (14.29%) Serverless
5 1 (7.14%) Azure
5 1 (7.14%) Power Platform
Database & Business Intelligence
1 14 (100.00%) Hadoop
2 10 (71.43%) Apache Hive
3 7 (50.00%) Impala
4 5 (35.71%) Data Lake
4 5 (35.71%) HBase
5 4 (28.57%) Big Data
6 3 (21.43%) Parquet
7 2 (14.29%) Amazon Athena
7 2 (14.29%) Apache Zeppelin
7 2 (14.29%) Data Warehouse
7 2 (14.29%) Presto
7 2 (14.29%) SQL Server
7 2 (14.29%) Sqoop
8 1 (7.14%) BigQuery
8 1 (7.14%) Cloudera CDH
8 1 (7.14%) DB2
8 1 (7.14%) NoSQL
8 1 (7.14%) Power BI
8 1 (7.14%) Spark SQL
Development Applications
1 6 (42.86%) JIRA
2 5 (35.71%) Jenkins
3 4 (28.57%) Travis CI
4 3 (21.43%) Git (software)
5 2 (14.29%) Atlassian Bamboo
General
1 6 (42.86%) Finance
2 4 (28.57%) Retail Banking
Job Titles
1 5 (35.71%) Data Engineer
1 5 (35.71%) Developer
2 4 (28.57%) Architect
2 4 (28.57%) Hadoop Developer
2 4 (28.57%) Java Developer
2 4 (28.57%) Java Hadoop Developer
3 3 (21.43%) Data Architect
4 2 (14.29%) AWS Engineer
5 1 (7.14%) Cloud Architect
5 1 (7.14%) Cloud Engineer
5 1 (7.14%) Systems Architect
Libraries, Frameworks & Software Standards
1 5 (35.71%) PySpark
2 4 (28.57%) Spring
3 2 (14.29%) JSON
3 2 (14.29%) Kafka
3 2 (14.29%) Web Services
3 2 (14.29%) XML
4 1 (7.14%) Spark Streaming
Miscellaneous
1 4 (28.57%) Linux Command Line
2 3 (21.43%) Algorithms
3 2 (14.29%) Cloud Native
Operating Systems
1 4 (28.57%) Unix
Processes & Methodologies
1 8 (57.14%) Agile Software Development
2 5 (35.71%) Data Modelling
2 5 (35.71%) Data Science
2 5 (35.71%) DevOps
2 5 (35.71%) Performance Testing
2 5 (35.71%) TDD
3 4 (28.57%) Computer Science
3 4 (28.57%) Data Ingestion
3 4 (28.57%) ETL
3 4 (28.57%) Functional Programming
3 4 (28.57%) OOP
3 4 (28.57%) Performance Optimisation
3 4 (28.57%) Performance Tuning
4 3 (21.43%) Continuous Integration
4 3 (21.43%) Data Architecture
4 3 (21.43%) Data Engineering
4 3 (21.43%) ETL Development
4 3 (21.43%) Logical Data Model
4 3 (21.43%) Physical Data Model
5 2 (14.29%) Technical Architecture
Programming Languages
1 12 (85.71%) Python
2 9 (64.29%) Java
2 9 (64.29%) SQL
3 7 (50.00%) Scala
4 5 (35.71%) R
5 1 (7.14%) Shell Script
Qualifications
1 1 (7.14%) SC Cleared
1 1 (7.14%) Security Cleared
System Software
1 1 (7.14%) Apache ZooKeeper
Systems Management
1 8 (57.14%) Hadoop YARN
2 1 (7.14%) Ansible
2 1 (7.14%) Oozie
Vendors
1 6 (42.86%) Cloudera
2 3 (21.43%) Tableau
3 2 (14.29%) Google
3 2 (14.29%) Oracle
4 1 (7.14%) Foundry
4 1 (7.14%) Hortonworks
4 1 (7.14%) Microsoft
4 1 (7.14%) Palantir