Apache Cassandra Contracts

The following table provides summary statistics for contract job vacancies with a requirement for Apache Cassandra skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Apache Cassandra over the 3 months to 28 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.

Apache Cassandra UK
Location	3 months to 28 Jun 2017	Same period 2016	Same period 2015
Rank	276	367	446
Rank change year-on-year	+91	+79
Contract jobs citing Apache Cassandra	405	308	200
As % of all contract IT jobs advertised in the UK	0.86%	0.57%	0.36%
As % of the Database & Business Intelligence category	3.84%	2.62%	1.54%
Number of daily rates quoted	293	225	145
Median daily rate	£537	£518	£500
Median daily rate % change year-on-year	+3.67%	+3.50%
90% offered a daily rate of more than	£374	£373	£375
10% offered a daily rate of more than	£663	£663	£675
UK excluding London median daily rate	£475	£425	£525
% change year-on-year	+11.76%	-19.04%
Number of hourly rates quoted	0	2	0
Median hourly rate	-	£55.00	-
UK excluding London median hourly rate	-	£55.00	-

Apache Cassandra 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 with a requirement for database and business intelligence skills.

Contract Database & Business Intelligence Skills UK
Contract job vacancies with a requirement for database and business intelligence skills	10537	11747	13009
As % of all contract IT job vacancies advertised in the UK	22.37%	21.81%	23.59%
Number of daily rates quoted	15318	17490	19694
Median daily rate	£450	£425	£400
Median daily rate % change year-on-year	+5.88%	+6.25%
90% offered a daily rate of more than	£313	£290	£268
10% offered a daily rate of more than	£613	£600	£575
UK excluding London median daily rate	£400	£375	£350
% change year-on-year	+6.66%	+7.14%
Number of hourly rates quoted	234	333	336
Median hourly rate	£31.25	£31.90	£27.64
Median hourly rate % change year-on-year	-2.03%	+15.41%
90% offered a hourly rate of more than	£12.50	£11.70	£15.23
10% offered a hourly rate of more than	£51.83	£50.55	£52.17
UK excluding London median hourly rate	£38.00	£31.95	£26.00
% change year-on-year	+18.93%	+22.88%

Apache Cassandra
Job Vacancy Trend

Job postings citing Apache Cassandra as a percentage of all IT jobs advertised.

Job vacancy trend for Apache Cassandra in the UK

Apache Cassandra
Contractor Daily Rate Trend

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

Contractor daily rate trend for Apache Cassandra in the UK

Apache Cassandra
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing Apache Cassandra over the 3 months to 28 June 2017.

Contractor daily rate histogram for Apache Cassandra in the UK

Apache Cassandra
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Apache Cassandra.

Contractor hourly rate trend for Apache Cassandra in the UK

Apache Cassandra
Top 10 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Apache Cassandra within the UK over the 3 months to 28 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location	Rank Change on Same Period Last Year	Matching Contract IT Job Ads	Median Daily Rate Last 3 Months	Median Daily Rate % Change on Same Period Last Year	Live Job Vacancies
England	+76	386	£538	+3.86%	108
London	+31	235	£550	+4.76%	75
UK excluding London	+99	167	£475	+11.76%	36
South East	+47	68	£478	+12.35%	9
North of England	+62	42	£475	+17.86%	11
Midlands	+34	20	£475	+11.76%	3
Scotland	+47	15	£350	-0.70%	2
East of England	-	14	£550	-	5
South West	-4	7	£413	-4.62%	5
Northern Ireland	-47	2	-	-	1

Apache Cassandra
Top 30 Co-occurring IT Skills

For the 6 months to 28 June 2017, IT contractor jobs citing Apache Cassandra also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads with a requirement for Apache Cassandra.

1	433 (61.16%)	Java
2	365 (51.55%)	Agile Software Development
3	336 (47.46%)	NoSQL
4	284 (40.11%)	MongoDB
5	245 (34.60%)	Linux
6	242 (34.18%)	Big Data
7	228 (32.20%)	Python
7	228 (32.20%)	TDD
8	221 (31.21%)	Scala
9	220 (31.07%)	Hadoop
10	213 (30.08%)	Apache Spark
11	203 (28.67%)	DevOps
12	193 (27.26%)	Kafka
13	173 (24.44%)	Amazon AWS
14	167 (23.59%)	Microservices

15	160 (22.60%)	Docker
16	159 (22.46%)	MySQL
17	158 (22.32%)	Jenkins
18	157 (22.18%)	SQL
19	150 (21.19%)	Spring
20	140 (19.77%)	Git (software)
20	140 (19.77%)	Open Source
21	134 (18.93%)	Scrum
22	128 (18.08%)	Oracle
23	127 (17.94%)	REST
24	121 (17.09%)	Software Engineering
25	120 (16.95%)	Puppet
26	119 (16.81%)	Finance
27	105 (14.83%)	Elasticsearch
27	105 (14.83%)	Analytics

Apache Cassandra
Co-occurring IT Skills 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
Applications
Business Applications
Cloud Services
Communications & Networking
Database & Business Intelligence
Development Applications
General
Job Titles
Libraries, Frameworks & Software Standards
Miscellaneous
Operating Systems
Processes & Methodologies
Programming Languages
Qualifications
Quality Assurance & Compliance
System Software
Systems Management
Vendors

Application Platforms
1	213 (30.08%)	Apache Spark
2	105 (14.83%)	Elasticsearch
3	81 (11.44%)	Apache
4	51 (7.20%)	Apache Pig
5	45 (6.36%)	Confluence
6	35 (4.94%)	Apache Solr
7	25 (3.53%)	OpenStack
8	22 (3.11%)	nginx
8	22 (3.11%)	Tomcat
9	15 (2.12%)	JBoss
10	12 (1.69%)	Oracle SOA Suite
11	8 (1.13%)	Oracle Coherence
12	7 (0.99%)	GlassFish
13	6 (0.85%)	SAS
13	6 (0.85%)	WebSphere
14	5 (0.71%)	DataSynapse
14	5 (0.71%)	WildFly
15	4 (0.56%)	CMS
15	4 (0.56%)	WebLogic
16	3 (0.42%)	Jetty

Applications
1	4 (0.56%)	GNU Octave
2	3 (0.42%)	Weka
3	2 (0.28%)	SPSS

Business Applications
1	2 (0.28%)	Siebel CRM
2	1 (0.14%)	BASE24
2	1 (0.14%)	SAP Oil and Gas

Cloud Services
1	173 (24.44%)	Amazon AWS
2	45 (6.36%)	Amazon EC2
3	38 (5.37%)	Microsoft Azure
4	25 (3.53%)	Twilio
5	22 (3.11%)	Slack
6	21 (2.97%)	Amazon S3
7	20 (2.82%)	Amazon SQS
8	16 (2.26%)	OpenShift
9	14 (1.98%)	Amazon EMR
9	14 (1.98%)	Google Cloud Platform
10	11 (1.55%)	Cloud Computing
11	9 (1.27%)	PaaS
11	9 (1.27%)	SaaS
12	8 (1.13%)	GitHub
13	6 (0.85%)	Akamai
13	6 (0.85%)	IaaS
13	6 (0.85%)	Loggly
14	4 (0.56%)	Sumo Logic
15	3 (0.42%)	AWS CloudFormation
15	3 (0.42%)	IBM Cloud

Communications & Networking
1	45 (6.36%)	HTTP
2	28 (3.95%)	DNS
3	27 (3.81%)	Firewall
4	20 (2.82%)	TCP/IP
5	14 (1.98%)	LAN
5	14 (1.98%)	WAN
6	13 (1.84%)	SSL
7	12 (1.69%)	HTTPS
8	8 (1.13%)	LDAP
9	6 (0.85%)	Internet
10	5 (0.71%)	Kerberos
11	4 (0.56%)	AMQP
11	4 (0.56%)	Skype
11	4 (0.56%)	tcpdump
11	4 (0.56%)	VPN
11	4 (0.56%)	Wireshark
12	3 (0.42%)	Intranet
13	2 (0.28%)	Network Security
13	2 (0.28%)	SSH
14	1 (0.14%)	SMPP

Database & Business Intelligence
1	336 (47.46%)	NoSQL
2	284 (40.11%)	MongoDB
3	242 (34.18%)	Big Data
4	220 (31.07%)	Hadoop
5	159 (22.46%)	MySQL
6	96 (13.56%)	PostgreSQL
7	94 (13.28%)	HBase
8	87 (12.29%)	Apache Hive
9	64 (9.04%)	Relational Database
10	63 (8.90%)	SQL Server
11	47 (6.64%)	Data Warehouse
12	35 (4.94%)	Sqoop
13	33 (4.66%)	RDBMS
14	27 (3.81%)	Amazon DynamoDB
15	26 (3.67%)	Redis
16	23 (3.25%)	Neo4j
17	22 (3.11%)	Impala
18	18 (2.54%)	CouchDB
19	16 (2.26%)	DB2
20	15 (2.12%)	Couchbase

Development Applications
1	158 (22.32%)	Jenkins
2	140 (19.77%)	Git (software)
3	67 (9.46%)	Maven
4	64 (9.04%)	JIRA
5	46 (6.50%)	JUnit
6	25 (3.53%)	Jasmine
7	21 (2.97%)	Bitbucket
7	21 (2.97%)	Subversion
8	19 (2.68%)	Cucumber
9	18 (2.54%)	Hudson
10	15 (2.12%)	GitLab
11	14 (1.98%)	Atlassian Bamboo
11	14 (1.98%)	Mockito
12	13 (1.84%)	Gradle
12	13 (1.84%)	TeamCity
13	12 (1.69%)	Selenium
14	11 (1.55%)	Ant
14	11 (1.55%)	Vagrant
15	10 (1.41%)	SonarQube
16	9 (1.27%)	Eclipse

General
1	119 (16.81%)	Finance
2	71 (10.03%)	Banking
3	15 (2.12%)	Games
4	12 (1.69%)	Front Office
5	10 (1.41%)	Investment Banking
6	7 (0.99%)	Retail
7	6 (0.85%)	Advertising
7	6 (0.85%)	Telecoms
8	5 (0.71%)	Law
9	2 (0.28%)	Back Office
9	2 (0.28%)	Publishing
9	2 (0.28%)	Wholesale Banking
10	1 (0.14%)	Billing
10	1 (0.14%)	Electronics
10	1 (0.14%)	Financial Institution
10	1 (0.14%)	Hungarian Language
10	1 (0.14%)	Legal
10	1 (0.14%)	Marketing
10	1 (0.14%)	Retail Banking
10	1 (0.14%)	Spanish Language

Job Titles
1	346 (48.87%)	Developer
2	207 (29.24%)	Java Developer
3	102 (14.41%)	Architect
4	67 (9.46%)	Senior Developer
5	66 (9.32%)	DevOps Engineer
6	62 (8.76%)	Big Data Developer
7	58 (8.19%)	Scala Developer
8	50 (7.06%)	Data Engineer
9	41 (5.79%)	AWS Developer
10	39 (5.51%)	Big Data Engineer
10	39 (5.51%)	Senior Java Developer
11	38 (5.37%)	AWS DevOps
12	36 (5.08%)	Cassandra Developer
13	34 (4.80%)	AWS Engineer
14	31 (4.38%)	Data Architect
14	31 (4.38%)	DBA
15	28 (3.95%)	Agile Developer
15	28 (3.95%)	Hadoop Developer
15	28 (3.95%)	Java Engineer
15	28 (3.95%)	Technical Architect

Libraries, Frameworks & Software Standards
1	193 (27.26%)	Kafka
2	150 (21.19%)	Spring
3	127 (17.94%)	REST
4	103 (14.55%)	Web Services
5	84 (11.86%)	HTML
6	77 (10.88%)	JSON
7	71 (10.03%)	Node.js
8	70 (9.89%)	CSS
9	63 (8.90%)	RESTful
10	62 (8.76%)	HTML5
11	60 (8.47%)	Spring Boot
12	54 (7.63%)	Akka
12	54 (7.63%)	Django
13	53 (7.49%)	Play Framework
14	51 (7.20%)	Ajax
15	48 (6.78%)	Elastic Stack
16	46 (6.50%)	CSS3
17	40 (5.65%)	Hibernate
18	35 (4.94%)	AngularJS
19	29 (4.10%)	Spark Streaming

Miscellaneous
1	64 (9.04%)	Greenfield Project
2	37 (5.23%)	Algorithms
3	34 (4.80%)	Client/Server
4	31 (4.38%)	User Experience
5	27 (3.81%)	Analytical Skills
5	27 (3.81%)	Computer Science
6	18 (2.54%)	Replication
6	18 (2.54%)	Video on Demand
7	17 (2.40%)	Clustering
8	16 (2.26%)	Fintech
9	15 (2.12%)	Enterprise Software
10	13 (1.84%)	Linux Command Line
11	12 (1.69%)	Data Structures
11	12 (1.69%)	Fixed Income
11	12 (1.69%)	Grid Computing
11	12 (1.69%)	Management Information System
11	12 (1.69%)	Mobile App
12	10 (1.41%)	Derivative
13	9 (1.27%)	Foreign Exchange (FX)
14	8 (1.13%)	DataPower

Operating Systems
1	245 (34.60%)	Linux
2	96 (13.56%)	Unix
3	40 (5.65%)	Red Hat Enterprise Linux
4	39 (5.51%)	CentOS
5	34 (4.80%)	Windows
6	20 (2.82%)	Android
7	16 (2.26%)	Apple iOS
8	12 (1.69%)	Ubuntu
9	9 (1.27%)	Mac OS X
9	9 (1.27%)	Windows Server
10	2 (0.28%)	CoreOS
11	1 (0.14%)	Debian
11	1 (0.14%)	Mesosphere
11	1 (0.14%)	Solaris
11	1 (0.14%)	Windows Server 2012

Processes & Methodologies
1	365 (51.55%)	Agile Software Development
2	228 (32.20%)	TDD
3	203 (28.67%)	DevOps
4	167 (23.59%)	Microservices
5	140 (19.77%)	Open Source
6	134 (18.93%)	Scrum
7	121 (17.09%)	Software Engineering
8	105 (14.83%)	Analytics
9	100 (14.12%)	BDD
10	97 (13.70%)	Continuous Integration
11	78 (11.02%)	Kanban
12	70 (9.89%)	Configuration Management
12	70 (9.89%)	Mentoring
13	65 (9.18%)	OO
14	61 (8.62%)	Machine Learning
15	55 (7.77%)	Continuous Delivery
16	49 (6.92%)	MapReduce
17	46 (6.50%)	Test Automation
18	41 (5.79%)	Data Modelling
19	35 (4.94%)	Data Analytics

Programming Languages
1	433 (61.16%)	Java
2	228 (32.20%)	Python
3	221 (31.21%)	Scala
4	157 (22.18%)	SQL
5	98 (13.84%)	JavaScript
6	63 (8.90%)	Ruby
7	61 (8.62%)	Bash Shell
8	48 (6.78%)	Perl
9	38 (5.37%)	R
10	36 (5.08%)	C#
11	32 (4.52%)	Shell Script
12	25 (3.53%)	PHP
13	18 (2.54%)	C++
14	17 (2.40%)	Go
15	15 (2.12%)	CQL
15	15 (2.12%)	Groovy
16	11 (1.55%)	PL/SQL
17	8 (1.13%)	Clojure
18	7 (0.99%)	Kotlin
18	7 (0.99%)	SPARQL

Qualifications
1	52 (7.34%)	Degree
2	17 (2.40%)	Master's Degree
3	13 (1.84%)	Computer Science Degree
4	8 (1.13%)	Numerate Degree
5	6 (0.85%)	PhD
6	5 (0.71%)	CISM
6	5 (0.71%)	CISSP
6	5 (0.71%)	MySQL Certification
7	4 (0.56%)	Cisco Certification
8	3 (0.42%)	CCNA
8	3 (0.42%)	CCSA
8	3 (0.42%)	JNCIA
8	3 (0.42%)	Security Cleared
9	2 (0.28%)	BPSS Clearance
10	1 (0.14%)	AWS Certification
10	1 (0.14%)	Chartered Engineer
10	1 (0.14%)	CISA
10	1 (0.14%)	GSEC
10	1 (0.14%)	ITIL Certification
10	1 (0.14%)	SC Cleared

Quality Assurance & Compliance
1	25 (3.53%)	QA
2	6 (0.85%)	Data Quality
3	3 (0.42%)	MiFID
3	3 (0.42%)	SLA
4	2 (0.28%)	GCP
5	1 (0.14%)	COBIT
5	1 (0.14%)	ISO/IEC 27001
5	1 (0.14%)	Sarbanes-Oxley
5	1 (0.14%)	WCAG

System Software
1	160 (22.60%)	Docker
2	49 (6.92%)	HDFS
3	32 (4.52%)	Apache Flume
4	23 (3.25%)	Xen
5	19 (2.68%)	VMware Infrastructure
6	18 (2.54%)	Apache ZooKeeper
7	17 (2.40%)	KVM
8	14 (1.98%)	LXC
9	7 (0.99%)	Platform Symphony
10	4 (0.56%)	vSphere
11	3 (0.42%)	Oracle RAC
12	2 (0.28%)	zsh
13	1 (0.14%)	Firmware
13	1 (0.14%)	Hyper-V
13	1 (0.14%)	Postfix
13	1 (0.14%)	Virtual Machines
13	1 (0.14%)	VirtualBox

Systems Management
1	120 (16.95%)	Puppet
2	101 (14.27%)	Opscode Chef
3	93 (13.14%)	Ansible
4	58 (8.19%)	Kubernetes
5	37 (5.23%)	Hadoop YARN
6	31 (4.38%)	logstash
7	29 (4.10%)	Grafana
8	27 (3.81%)	Terraform
9	23 (3.25%)	Oozie
10	22 (3.11%)	Nagios
11	21 (2.97%)	Kibana
12	15 (2.12%)	ZABBIX
13	13 (1.84%)	Mesos
14	12 (1.69%)	Graphite
15	9 (1.27%)	Marathon
15	9 (1.27%)	Rancher
16	8 (1.13%)	Prometheus
16	8 (1.13%)	Salt
17	7 (0.99%)	FreeIPA
17	7 (0.99%)	HP SiteScope

Vendors
1	128 (18.08%)	Oracle
2	55 (7.77%)	Red Hat
3	42 (5.93%)	Splunk
4	27 (3.81%)	Cloudera
4	27 (3.81%)	Microsoft
5	24 (3.39%)	VMware
6	20 (2.82%)	SaltStack
7	18 (2.54%)	IBM
8	17 (2.40%)	Sybase
9	14 (1.98%)	Google
10	12 (1.69%)	Hortonworks
11	11 (1.55%)	Dynatrace
12	10 (1.41%)	AppDynamics
12	10 (1.41%)	Pega
13	9 (1.27%)	Informatica
13	9 (1.27%)	Teradata
14	8 (1.13%)	SAP
14	8 (1.13%)	WSO2
15	7 (0.99%)	HP
15	7 (0.99%)	Percona