The following table provides summary statistics for contract job vacancies with a requirement for Log4j skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Log4j over the 3 months to 27 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 Log4j
UK
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 602 628 635
Rank change year-on-year +26 +7  
Contract jobs citing Log4j 8 26 7
As % of all contract IT jobs advertised in the UK 0.017% 0.048% 0.013%
As % of the Development Applications category 0.097% 0.31% 0.095%
Number of daily rates quoted 5 21 1
Median daily rate £513 £375 £545
Median daily rate % change year-on-year +36.66% -31.19%  
UK excluding London median daily rate - £375 -
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

Log4j is in the development application skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies with a requirement for development application skills.

Contract Development Application Skills
UK
Contract job vacancies with a requirement for development application skills 8267 8396 7386
As % of all contract IT job vacancies advertised in the UK 17.55% 15.55% 13.39%
Number of daily rates quoted 5644 5778 4882
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 £325 £313 £295
10% offered a daily rate of more than £575 £550 £550
UK excluding London median daily rate £413 £400 £363
% change year-on-year +3.12% +10.34%  
Number of hourly rates quoted 153 129 123
Median hourly rate £42.50 £42.13 £37.00
Median hourly rate % change year-on-year +0.89% +13.85%  
90% offered a hourly rate of more than £32.50 £25.20 £22.18
10% offered a hourly rate of more than £61.69 £49.75 £45.00
UK excluding London median hourly rate £43.25 £42.00 £37.04
% change year-on-year +2.97% +13.39%  

Log4j
Job Vacancy Trend

The job posting trend of jobs advertised citing Log4j as a proportion of all contract or permanent IT jobs with a match in the Development Applications category.

Job vacancy trend for Log4j in the UK

Log4j
Contractor Daily Rate Trend

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Log4j.

Contractor daily rate trend for Log4j in the UK

Log4j
Contractor Hourly Rate Trend

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Log4j.

Contractor hourly rate trend for Log4j in the UK

Log4j
Top 6 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Log4j within the UK over the 3 months to 27 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 +4 8 £513 +36.66% 2
London +8 7 £513 -12.76% 1
East of England - 1 - -
City of London - 1 £475 -
Watford - 1 - -
Hertfordshire - 1 - -

For the 6 months to 27 June 2017, IT contractor jobs citing Log4j 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 Log4j.

1 17 (100.00%) Java
1 17 (100.00%) Web Services
2 16 (94.12%) Linux
2 16 (94.12%) Apache
3 10 (58.82%) JMS
3 10 (58.82%) XML
3 10 (58.82%) JSP
4 9 (52.94%) WebLogic
4 9 (52.94%) JDBC
4 9 (52.94%) SQL
4 9 (52.94%) J2EE
4 9 (52.94%) Oracle
4 9 (52.94%) E-Commerce
4 9 (52.94%) Tomcat
4 9 (52.94%) JBoss
4 9 (52.94%) XSLT
4 9 (52.94%) TDD
4 9 (52.94%) Subversion
4 9 (52.94%) WebSphere
5 8 (47.06%) Agile Software Development
5 8 (47.06%) Quality Management
5 8 (47.06%) ATG
5 8 (47.06%) ATG Dynamo
5 8 (47.06%) SQL Server
5 8 (47.06%) Ant
5 8 (47.06%) MySQL
5 8 (47.06%) JavaScript
5 8 (47.06%) HTML
5 8 (47.06%) Servlets
5 8 (47.06%) Git (software)

Log4j
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
1 16 (94.12%) Apache
2 9 (52.94%) JBoss
2 9 (52.94%) Tomcat
2 9 (52.94%) WebLogic
2 9 (52.94%) WebSphere
3 8 (47.06%) ATG Dynamo
4 1 (5.88%) MQSeries
4 1 (5.88%) WebLogic Portal
Cloud Services
1 4 (23.53%) Amazon AWS
Communications & Networking
1 7 (41.18%) HTTP
1 7 (41.18%) LDAP
2 1 (5.88%) Internet
Database & Business Intelligence
1 8 (47.06%) MySQL
1 8 (47.06%) Oracle Database
1 8 (47.06%) SQL Server
2 7 (41.18%) Apache Cassandra
3 4 (23.53%) MongoDB
4 1 (5.88%) DB2
Development Applications
1 9 (52.94%) Subversion
2 8 (47.06%) Ant
2 8 (47.06%) Git (software)
3 7 (41.18%) Atlassian Bamboo
3 7 (41.18%) Bitbucket
3 7 (41.18%) Fiddler
3 7 (41.18%) Jenkins
3 7 (41.18%) JIRA
3 7 (41.18%) JMeter
3 7 (41.18%) YourKit
4 6 (35.29%) Gatling
4 6 (35.29%) Hudson
4 6 (35.29%) LoadRunner
4 6 (35.29%) LoadUI
5 3 (17.65%) WebPagetest
6 1 (5.88%) Eclipse
6 1 (5.88%) JUnit
6 1 (5.88%) Maven
6 1 (5.88%) Mockito
6 1 (5.88%) Talend Open Studio
General
1 1 (5.88%) Back Office
1 1 (5.88%) Banking
1 1 (5.88%) Finance
1 1 (5.88%) Games
Job Titles
1 8 (47.06%) Developer
2 5 (29.41%) Performance Engineer
3 4 (23.53%) Senior Developer
4 2 (11.76%) DevOps Engineer
4 2 (11.76%) Java Engineer
4 2 (11.76%) QA Engineer
5 1 (5.88%) Consultant
5 1 (5.88%) Performance Test Engineer
5 1 (5.88%) Senior Performance Engineer
5 1 (5.88%) Technical Consultant
5 1 (5.88%) Technical Leader
5 1 (5.88%) Test Engineer
Libraries, Frameworks & Software Standards
1 17 (100.00%) Web Services
2 10 (58.82%) JMS
2 10 (58.82%) JSP
2 10 (58.82%) XML
3 9 (52.94%) J2EE
3 9 (52.94%) JDBC
3 9 (52.94%) XSLT
4 8 (47.06%) HTML
4 8 (47.06%) Servlets
5 7 (41.18%) Ajax
5 7 (41.18%) ODBC
6 1 (5.88%) ActiveMQ
6 1 (5.88%) CSS
6 1 (5.88%) EJB
6 1 (5.88%) Java EE
6 1 (5.88%) JSON
6 1 (5.88%) SOAP
6 1 (5.88%) Spring
6 1 (5.88%) Spring Security
6 1 (5.88%) XSD
Miscellaneous
1 7 (41.18%) Client/Server
2 1 (5.88%) Computer Science
Operating Systems
1 16 (94.12%) Linux
2 7 (41.18%) Windows
3 1 (5.88%) HPUX
3 1 (5.88%) Solaris
3 1 (5.88%) Unix
Processes & Methodologies
1 9 (52.94%) E-Commerce
1 9 (52.94%) TDD
2 8 (47.06%) Agile Software Development
2 8 (47.06%) Personalization
2 8 (47.06%) Quality Management
3 7 (41.18%) ATDD
3 7 (41.18%) BDD
3 7 (41.18%) Continuous Delivery
3 7 (41.18%) Continuous Integration
3 7 (41.18%) Defect Management
3 7 (41.18%) Feature Driven Development
3 7 (41.18%) Performance Monitoring
3 7 (41.18%) Performance Tuning
4 6 (35.29%) Performance Testing
5 4 (23.53%) Performance Engineering
6 2 (11.76%) DevOps
7 1 (5.88%) Dependency Management
7 1 (5.88%) ETL
7 1 (5.88%) RAD
7 1 (5.88%) Web Development
Programming Languages
1 17 (100.00%) Java
2 9 (52.94%) SQL
3 8 (47.06%) JavaScript
4 7 (41.18%) Bash Shell
5 3 (17.65%) Groovy
5 3 (17.65%) Scala
Qualifications
1 1 (5.88%) Computer Science Degree
1 1 (5.88%) Degree
Quality Assurance & Compliance
1 6 (35.29%) QA
Systems Management
1 7 (41.18%) Grafana
1 7 (41.18%) Graphite
1 7 (41.18%) HP SiteScope
1 7 (41.18%) Nagios
1 7 (41.18%) ZABBIX
Vendors
1 9 (52.94%) Oracle
2 8 (47.06%) ATG
3 7 (41.18%) Dynatrace
3 7 (41.18%) HP
4 3 (17.65%) SOASTA, Inc
5 2 (11.76%) IBM
6 1 (5.88%) Misys
6 1 (5.88%) Talend