Period
to 22 September 2018

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for Garbage Collection skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Garbage Collection over the 6 months to 22 September 2018 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.

Garbage Collection
Central London > City of London
6 months to
22 Sep 2018
Same period 2017 Same period 2016
Rank 249 238 209
Rank change year-on-year -11 -29 +47
Contract jobs citing Garbage Collection 5 4 38
As % of all contract IT jobs advertised in the City of London 0.072% 0.059% 0.56%
As % of the Processes & Methodologies category 0.084% 0.066% 0.64%
Number of daily rates quoted 4 4 38
City of London median daily rate £600 £493 £613
Median daily rate % change year-on-year +21.83% -19.59% +6.52%
10th Percentile £566 £402 £525
90th Percentile £625 £613 £669
Central London median daily rate £600 £493 £625
% change year-on-year +21.83% -21.20% +8.70%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

Garbage Collection is in the Processes and Methodologies 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 process or methodology skills.

All Process and Methodology Skills
City of London
Contract vacancies with a requirement for process or methodology skills 5,986 6,033 5,935
As % of all contract IT jobs advertised in the City of London 86.39% 88.96% 87.68%
Number of daily rates quoted 4,772 4,713 4,776
City of London median daily rate £500 £500 £475
Median daily rate % change year-on-year - +5.26% +2.70%
10th Percentile £330 £325 £313
90th Percentile £681 £675 £658
Central London median daily rate £500 £500 £475
% change year-on-year - +5.26% +5.56%
Number of hourly rates quoted 101 56 51
City of London median hourly rate £18.70 £19.35 £20.00
Median hourly rate % change year-on-year -3.36% -3.25% -4.76%
10th Percentile £13.00 £13.31 £11.25
90th Percentile £33.00 £31.13 £55.00
Central London median hourly rate £18.70 £18.70 £20.00
% change year-on-year - -6.50% -

Garbage Collection
Job Vacancy Trend in the City of London

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

Job vacancy trend for Garbage Collection in the City of London

Garbage Collection
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 Garbage Collection in the City of London.

Contractor daily rate trend for Garbage Collection in the City of London

For the 6 months to 22 September 2018, IT contractor jobs citing Garbage Collection 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 Garbage Collection.

1 4 (80.00%) Multithreading
2 3 (60.00%) Software Engineering
2 3 (60.00%) C#
2 3 (60.00%) Parallel Processing
2 3 (60.00%) Asynchronous Programming
3 2 (40.00%) OO
3 2 (40.00%) Front Office
3 2 (40.00%) Credit Risk
3 2 (40.00%) Market Risk
4 1 (20.00%) Performance Testing
4 1 (20.00%) Integration Testing
4 1 (20.00%) Atlassian Bamboo
4 1 (20.00%) Continuous Integration
4 1 (20.00%) Software Testing
4 1 (20.00%) ISTQB
4 1 (20.00%) QA
4 1 (20.00%) Electronic Trading
4 1 (20.00%) TestNG
4 1 (20.00%) EasyMock
4 1 (20.00%) Test Automation
4 1 (20.00%) Product Management
4 1 (20.00%) Amazon AWS
4 1 (20.00%) Open Source
4 1 (20.00%) Capacity Planning
4 1 (20.00%) Mockito
4 1 (20.00%) Regression Testing
4 1 (20.00%) Agile Software Development
4 1 (20.00%) TDD
4 1 (20.00%) Banking
4 1 (20.00%) Spring

Garbage Collection
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 1 (20.00%) Apache Spark
Cloud Services
1 1 (20.00%) Amazon AWS
Communications & Networking
1 1 (20.00%) HTTP
Database & Business Intelligence
1 1 (20.00%) Flink
Development Applications
1 1 (20.00%) Atlassian Bamboo
1 1 (20.00%) EasyMock
1 1 (20.00%) Gatling
1 1 (20.00%) Jenkins
1 1 (20.00%) JUnit
1 1 (20.00%) Mockito
1 1 (20.00%) TestNG
1 1 (20.00%) Travis CI
General
1 2 (40.00%) Front Office
2 1 (20.00%) Banking
Job Titles
1 4 (80.00%) Developer
2 3 (60.00%) C# Developer
3 1 (20.00%) C++ Developer
3 1 (20.00%) Electronic Trading C++ Developer
3 1 (20.00%) Electronic Trading Developer
3 1 (20.00%) Senior Software Testing Engineer
3 1 (20.00%) Software Testing Engineer
3 1 (20.00%) Testing Engineer
Libraries, Frameworks & Software Standards
1 1 (20.00%) Java Concurrency
1 1 (20.00%) Kafka
1 1 (20.00%) Lambda Expressions
1 1 (20.00%) Spark Streaming
1 1 (20.00%) Spring
1 1 (20.00%) WebSockets
1 1 (20.00%) WireMock
Miscellaneous
1 2 (40.00%) Credit Risk
1 2 (40.00%) Market Risk
2 1 (20.00%) Foreign Exchange (FX)
Operating Systems
1 1 (20.00%) Linux
Processes & Methodologies
1 4 (80.00%) Multithreading
2 3 (60.00%) Asynchronous Programming
2 3 (60.00%) Parallel Processing
2 3 (60.00%) Software Engineering
3 2 (40.00%) OO
4 1 (20.00%) Agile Software Development
4 1 (20.00%) Concurrent Programming
4 1 (20.00%) Continuous Delivery
4 1 (20.00%) Continuous Integration
4 1 (20.00%) E-Commerce
4 1 (20.00%) Electronic Trading
4 1 (20.00%) Integration Testing
4 1 (20.00%) Microservices
4 1 (20.00%) Open Source
4 1 (20.00%) Performance Testing
4 1 (20.00%) Product Management
4 1 (20.00%) Regression Testing
4 1 (20.00%) Software Testing
4 1 (20.00%) TDD
4 1 (20.00%) Test Automation
Programming Languages
1 3 (60.00%) C#
2 1 (20.00%) C++
2 1 (20.00%) Java
2 1 (20.00%) SQL
Qualifications
1 1 (20.00%) ISTQB
1 1 (20.00%) ISTQB Advanced Certification
Quality Assurance & Compliance
1 1 (20.00%) QA
System Software
1 1 (20.00%) Docker
Systems Management
1 1 (20.00%) Kubernetes