The following table provides summary statistics for contract job vacancies advertised in London with a requirement for Riak skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Riak over the 3 months to 29 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.

Riak
England / London
3 months to
29 Mar 2017
Same period 2016 Same period 2015
Rank 403 436 400
Rank change year-on-year +33 -36  
Contract jobs citing Riak 5 3 6
As % of all contract IT jobs advertised in London 0.026% 0.013% 0.028%
As % of the Database & Business Intelligence category 0.10% 0.055% 0.12%
Number of daily rates quoted 3 3 6
Median daily rate £600 £540 £525
Median daily rate % change year-on-year +11.11% +2.85%  
UK excluding London median daily rate £355 £475 £363
% change year-on-year -25.26% +31.03%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

Riak is in the database and business intelligence skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in London with a requirement for database and business intelligence skills.

Contract Database & Business Intelligence Skills
London
Contract job vacancies with a requirement for database and business intelligence skills 4903 5431 5120
As % of all contract IT job vacancies advertised in London 25.06% 24.20% 24.06%
Number of daily rates quoted 3554 3905 3551
Median daily rate £490 £475 £450
Median daily rate % change year-on-year +3.15% +5.55%  
90% offered a daily rate of more than £350 £325 £310
10% offered a daily rate of more than £625 £620 £588
UK excluding London median daily rate £400 £388 £375
% change year-on-year +3.22% +3.33%  
Number of hourly rates quoted 18 36 40
Median hourly rate £30.00 £43.00 £22.83
Median hourly rate % change year-on-year -30.23% +88.34%  
90% offered a hourly rate of more than £17.80 £18.00 £14.70
10% offered a hourly rate of more than £109.50 £50.00 £55.00
UK excluding London median hourly rate £34.24 £32.50 £32.50
% change year-on-year +5.35% -  

Riak
Job Vacancy Trend in London

The job posting trend of jobs advertised in London citing Riak as a proportion of all contract or permanent IT jobs with a match in the Database & Business Intelligence category.

Job vacancy trend for Riak in London

Riak
Contractor Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Riak in London.

Contractor daily rate trend for Riak in London

Riak
Contractor Daily Rate Histogram in London

The daily rate distribution of IT jobs citing Riak in London over the 3 months to 29 March 2017.

Contractor daily rate histogram for Riak in London

For the 6 months to 29 March 2017, IT contractor jobs citing Riak 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 London region with a requirement for Riak.

1 21 (80.77%) Apache Solr
2 18 (69.23%) MongoDB
2 18 (69.23%) Apache Cassandra
2 18 (69.23%) NoSQL
3 16 (61.54%) Hadoop
3 16 (61.54%) Big Data
4 14 (53.85%) Apache Spark
4 14 (53.85%) Perl
4 14 (53.85%) Python
5 13 (50.00%) Data Warehouse
5 13 (50.00%) Java
5 13 (50.00%) Bash Shell
5 13 (50.00%) Apache Hive
5 13 (50.00%) MapReduce
5 13 (50.00%) Lucene
5 13 (50.00%) MarkLogic
6 12 (46.15%) Statistical Modelling
6 12 (46.15%) Kafka
6 12 (46.15%) Apache Pig
6 12 (46.15%) Hadoop YARN
6 12 (46.15%) Impala
6 12 (46.15%) Analytical Skills
6 12 (46.15%) Data Analysis
6 12 (46.15%) R
6 12 (46.15%) Open Source
6 12 (46.15%) Unix
7 9 (34.62%) Hibernate
7 9 (34.62%) JavaScript
7 9 (34.62%) SQL Server
7 9 (34.62%) JMS

Riak
Co-occurring IT Skills in 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 21 (80.77%) Apache Solr
2 14 (53.85%) Apache Spark
3 12 (46.15%) Apache Pig
4 5 (19.23%) Apache
5 4 (15.38%) nginx
6 3 (11.54%) Elasticsearch
6 3 (11.54%) Tomcat
7 2 (7.69%) IIS
7 2 (7.69%) JBoss
7 2 (7.69%) OpenStack
7 2 (7.69%) WebSphere
8 1 (3.85%) Cloud Foundry
8 1 (3.85%) Jetty
8 1 (3.85%) Oracle Coherence
8 1 (3.85%) WebLogic
Applications
1 1 (3.85%) MS Excel
Cloud Services
1 9 (34.62%) Amazon AWS
2 4 (15.38%) Microsoft Azure
3 3 (11.54%) Amazon EC2
4 2 (7.69%) IaaS
4 2 (7.69%) PaaS
5 1 (3.85%) GitHub
5 1 (3.85%) Office 365
5 1 (3.85%) Slack
5 1 (3.85%) Trello
Communications & Networking
1 3 (11.54%) Firewall
2 2 (7.69%) DNS
3 1 (3.85%) LAN
3 1 (3.85%) TCP/IP
3 1 (3.85%) WAN
Database & Business Intelligence
1 18 (69.23%) Apache Cassandra
1 18 (69.23%) MongoDB
1 18 (69.23%) NoSQL
2 16 (61.54%) Big Data
2 16 (61.54%) Hadoop
3 13 (50.00%) Apache Hive
3 13 (50.00%) Data Warehouse
3 13 (50.00%) MarkLogic
4 12 (46.15%) Impala
5 9 (34.62%) SQL Server
6 6 (23.08%) Redis
7 5 (19.23%) Relational Database
8 3 (11.54%) Amazon DynamoDB
8 3 (11.54%) CouchDB
8 3 (11.54%) Data Mining
8 3 (11.54%) MySQL
9 2 (7.69%) Couchbase
9 2 (7.69%) PostgreSQL
9 2 (7.69%) RDBMS
10 1 (3.85%) Sqoop
Development Applications
1 5 (19.23%) TeamCity
2 2 (7.69%) Ant
2 2 (7.69%) Git (software)
2 2 (7.69%) GoCD
2 2 (7.69%) Jenkins
2 2 (7.69%) Maven
2 2 (7.69%) SonarQube
2 2 (7.69%) Team Foundation Server
3 1 (3.85%) Artifactory
General
1 7 (26.92%) Finance
2 2 (7.69%) Banking
3 1 (3.85%) Front Office
3 1 (3.85%) Retail
Job Titles
1 11 (42.31%) Developer
2 6 (23.08%) Java Developer
3 5 (19.23%) Senior Developer
3 5 (19.23%) Senior Java Developer
4 4 (15.38%) .NET Developer
4 4 (15.38%) Angular Developer
4 4 (15.38%) ASP.NET MVC Developer
4 4 (15.38%) Big Data Engineer
4 4 (15.38%) C# .NET Developer
4 4 (15.38%) C# Developer
4 4 (15.38%) JavaScript Developer
4 4 (15.38%) Node.js Developer
4 4 (15.38%) Senior Software Engineer
4 4 (15.38%) Software Engineer
5 3 (11.54%) Architect
5 3 (11.54%) Big Data Architect
5 3 (11.54%) Cloud Engineer
5 3 (11.54%) Data Architect
5 3 (11.54%) Data Engineer
5 3 (11.54%) Web Engineer
Libraries, Frameworks & Software Standards
1 13 (50.00%) Lucene
2 12 (46.15%) Kafka
3 9 (34.62%) Hibernate
3 9 (34.62%) JMS
3 9 (34.62%) Spring
4 7 (26.92%) .NET
5 6 (23.08%) AngularJS
5 6 (23.08%) Node.js
5 6 (23.08%) React
6 5 (19.23%) ASP.NET
6 5 (19.23%) RabbitMQ
7 3 (11.54%) Natural Language Processing
7 3 (11.54%) Web Services
8 1 (3.85%) Elastic Stack
8 1 (3.85%) LAMP
8 1 (3.85%) LAPP Stack
8 1 (3.85%) LEMP Stack
Miscellaneous
1 12 (46.15%) Analytical Skills
2 3 (11.54%) Algorithms
2 3 (11.54%) Replication
3 1 (3.85%) Foreign Exchange (FX)
3 1 (3.85%) Management Information System
Operating Systems
1 12 (46.15%) Unix
2 9 (34.62%) Linux
3 3 (11.54%) CentOS
3 3 (11.54%) Red Hat Enterprise Linux
4 2 (7.69%) Windows
5 1 (3.85%) Android
5 1 (3.85%) Apple iOS
5 1 (3.85%) CoreOS
5 1 (3.85%) Solaris
Processes & Methodologies
1 13 (50.00%) MapReduce
2 12 (46.15%) Data Analysis
2 12 (46.15%) Open Source
2 12 (46.15%) Statistical Modelling
3 8 (30.77%) Agile Software Development
3 8 (30.77%) Continuous Integration
4 6 (23.08%) TDD
5 5 (19.23%) BDD
5 5 (19.23%) ETL
5 5 (19.23%) MVC
6 4 (15.38%) Data Engineering
6 4 (15.38%) Data Visualisation
6 4 (15.38%) Pair Programming
6 4 (15.38%) Software Engineering
6 4 (15.38%) Visualisation
7 3 (11.54%) DevOps
7 3 (11.54%) Information Retrieval
7 3 (11.54%) Machine Learning
7 3 (11.54%) Mathematical Modelling
7 3 (11.54%) Mathematics
Programming Languages
1 14 (53.85%) Perl
1 14 (53.85%) Python
2 13 (50.00%) Bash Shell
2 13 (50.00%) Java
3 12 (46.15%) R
4 9 (34.62%) JavaScript
5 8 (30.77%) C#
6 7 (26.92%) Scala
7 6 (23.08%) SQL
8 5 (19.23%) CoffeeScript
8 5 (19.23%) Ruby
9 2 (7.69%) Go
10 1 (3.85%) Elixir
10 1 (3.85%) Erlang
10 1 (3.85%) PowerShell
System Software
1 2 (7.69%) Docker
2 1 (3.85%) Apache Flume
2 1 (3.85%) Apache ZooKeeper
2 1 (3.85%) HDFS
2 1 (3.85%) Oracle RAC
2 1 (3.85%) Postfix
Systems Management
1 12 (46.15%) Hadoop YARN
2 3 (11.54%) Ansible
2 3 (11.54%) Opscode Chef
3 2 (7.69%) Puppet
4 1 (3.85%) Ambari
4 1 (3.85%) Control-M
4 1 (3.85%) Icinga
4 1 (3.85%) Kibana
4 1 (3.85%) Kubernetes
4 1 (3.85%) logstash
4 1 (3.85%) Mesos
4 1 (3.85%) Nagios
4 1 (3.85%) Oozie
4 1 (3.85%) rkt
4 1 (3.85%) Salt
4 1 (3.85%) Unicenter
4 1 (3.85%) ZABBIX
Vendors
1 5 (19.23%) Microsoft
2 3 (11.54%) Oracle
3 2 (7.69%) New Relic
4 1 (3.85%) Cisco
4 1 (3.85%) Google
4 1 (3.85%) Hortonworks
4 1 (3.85%) Intel
4 1 (3.85%) Netezza
4 1 (3.85%) Sybase
4 1 (3.85%) Teradata