The table below looks at the prevalence of the term Inversion of Control in IT contracts advertised for the City of London region. Included is a guide to the average contractor rates offered in IT contracts that have cited Inversion of Control over the 3 months to 17 April 2015 with a comparison to the same period in the previous 2 years.

Note that daily contractor rates and hourly contractor rates are treated separately. When calculating average contractor rates, daily rates are not derived from quoted hourly rates or vice versa.

Location
3 months to
17 Apr 2015
Same period 2014 Same period 2013
Inversion of Control (IoC)
Rank 186 202 194
Rank change year-on-year
+16 -8
Contract jobs citing Inversion of Control 4 9 12
As % of all contract IT jobs located in the City of London 0.074% 0.14% 0.19%
As % of the Miscellaneous category 0.20% 0.36% 0.52%
Number of daily rates quoted 4 6 11
Average daily rate
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£400 £375 £500
Average daily rate % change year-on-year
+6.66% -25.00%
UK excluding London average daily rate £375 £388 £300
% change year-on-year
-3.22% +29.16%
Number of hourly rates quoted 0 0 0
Average hourly rate - - -
UK excluding London average hourly rate - - -
Inversion of Control
London

The following table is for comparison with the above and provides statistics for the entire Miscellaneous category in contract jobs advertised in the City of London region.

Miscellaneous Category
City of London
Contract IT job ads with a match in the
Miscellaneous category
1993 2500 2330
As % of all contract IT jobs located in the City of London 36.65% 38.59% 36.93%
Number of daily rates quoted 1506 1858 1736
Average daily rate £475 £475 £475
90% offered a daily rate of more than £275 £290 £300
10% offered a daily rate of more than £625 £650 £625
UK excluding London average daily rate £375 £350 £340
% change year-on-year
+7.14% +2.94%
Number of hourly rates quoted 32 36 52
Average hourly rate £18.70 £22.50 £22.00
Average hourly rate % change year-on-year
-16.88% +2.27%
90% offered a hourly rate of more than £13.70 £13.17 £15.75
10% offered a hourly rate of more than £60.50 £41.00 £135.00
UK excluding London average hourly rate £19.00 £20.50 £23.50
% change year-on-year
-7.31% -12.76%

Inversion of Control
Jobs Demand Trend in the City of London

This chart provides a 3-month moving total of IT contractor jobs citing Inversion of Control across the City of London region as a proportion of the total demand within the Miscellaneous category.

Inversion of Control Jobs Demand Trend in the City of London

Inversion of Control
Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in IT contract jobs citing Inversion of Control across the City of London region.

Inversion of Control Daily Rate Trend in the City of London

Inversion of Control
Top 30 Related IT Skills in the City of London

For the 6 months to 17 April 2015, IT contractor jobs across the City of London region citing Inversion of Control also mentioned the following IT skills in order of popularity. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited Inversion of Control.

1 10 (83.33%) TDD
2 9 (75.00%) .NET
3 8 (66.67%) SQL Server
3 8 (66.67%) .NET Framework
3 8 (66.67%) WCF
3 8 (66.67%) Unity DI Container
4 7 (58.33%) MVC
4 7 (58.33%) C#
5 6 (50.00%) WPF
6 5 (41.67%) SQL
6 5 (41.67%) OO
7 4 (33.33%) SOA
7 4 (33.33%) HTML
7 4 (33.33%) JavaScript
7 4 (33.33%) ASP.NET
7 4 (33.33%) CSS
7 4 (33.33%) Release Management
7 4 (33.33%) Banking
7 4 (33.33%) Agile Software Development
7 4 (33.33%) Task Parallel Library
7 4 (33.33%) Continuous Integration
7 4 (33.33%) jQuery
7 4 (33.33%) ASP.NET MVC
8 3 (25.00%) Dependency Injection
8 3 (25.00%) Team Foundation Server
8 3 (25.00%) Entity Framework
8 3 (25.00%) Castle Windsor
8 3 (25.00%) Memory Management
8 3 (25.00%) ASP.NET Web API
8 3 (25.00%) Scrum

Inversion of Control
Top Related IT Skills in the City of London by Category

For the 6 months to 17 April 2015, IT contractor jobs across the City of London region citing Inversion of Control also mentioned the following IT skills grouped by category. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited Inversion of Control. Up to 20 skills are shown per category.

Application Platforms
1 2 (16.67%) Apache
1 2 (16.67%) Tomcat
2 1 (8.33%) SharePoint
Database & Business Intelligence
1 8 (66.67%) SQL Server
2 1 (8.33%) RDBMS
2 1 (8.33%) SQL Server 2008
2 1 (8.33%) Relational Database
Development Applications
1 3 (25.00%) NUnit
1 3 (25.00%) Subversion
1 3 (25.00%) JIRA
1 3 (25.00%) Team Foundation Server
2 2 (16.67%) MSTest
2 2 (16.67%) TeamCity
2 2 (16.67%) Git (software)
2 2 (16.67%) Mockito
2 2 (16.67%) Maven
2 2 (16.67%) Ant
2 2 (16.67%) Visual Studio
2 2 (16.67%) IntelliJ
2 2 (16.67%) ProC
3 1 (8.33%) Visual Studio Team System
3 1 (8.33%) SpecFlow
3 1 (8.33%) SQL Server Management Studio (SSMS)
3 1 (8.33%) Rhino Mocks
3 1 (8.33%) Moq
General
1 4 (33.33%) Banking
2 2 (16.67%) Finance
3 1 (8.33%) Investment Banking
Job Titles
1 10 (83.33%) Developer
2 6 (50.00%) .NET Developer
3 3 (25.00%) Architect
4 2 (16.67%) .NET Architect
4 2 (16.67%) Front-End Developer
4 2 (16.67%) Senior Developer
5 1 (8.33%) C# .NET Developer
5 1 (8.33%) C# Developer
5 1 (8.33%) Senior Software Developer
5 1 (8.33%) Software Developer
5 1 (8.33%) Technical Architect
Libraries, Frameworks & Software Standards
1 9 (75.00%) .NET
2 8 (66.67%) .NET Framework
2 8 (66.67%) WCF
2 8 (66.67%) Unity DI Container
3 6 (50.00%) WPF
4 4 (33.33%) HTML
4 4 (33.33%) jQuery
4 4 (33.33%) ASP.NET
4 4 (33.33%) CSS
4 4 (33.33%) Task Parallel Library
4 4 (33.33%) ASP.NET MVC
5 3 (25.00%) Entity Framework
5 3 (25.00%) Castle Windsor
5 3 (25.00%) ASP.NET Web API
5 3 (25.00%) Web Services
6 2 (16.67%) JMS
6 2 (16.67%) Spring
6 2 (16.67%) NHibernate
6 2 (16.67%) GWT
6 2 (16.67%) Spring MVC
Miscellaneous
1 3 (25.00%) Derivative
1 3 (25.00%) Equity Derivative
2 1 (8.33%) Mobile App
2 1 (8.33%) Enterprise Software
2 1 (8.33%) N-Tier
2 1 (8.33%) Tandem
Operating Systems
1 2 (16.67%) Windows
Processes & Methodologies
1 10 (83.33%) TDD
2 7 (58.33%) MVC
3 5 (41.67%) OO
4 4 (33.33%) SOA
4 4 (33.33%) Agile Software Development
4 4 (33.33%) Continuous Integration
4 4 (33.33%) Release Management
5 3 (25.00%) Dependency Injection
5 3 (25.00%) Memory Management
5 3 (25.00%) Scrum
6 2 (16.67%) OOP
6 2 (16.67%) Software Engineering
6 2 (16.67%) Unit Testing
7 1 (8.33%) Integration Testing
7 1 (8.33%) MVVM
7 1 (8.33%) ATDD
7 1 (8.33%) Analytics
7 1 (8.33%) Mobile Application Development
7 1 (8.33%) DevOps
7 1 (8.33%) Continuous Delivery
Programming Languages
1 7 (58.33%) C#
2 5 (41.67%) SQL
3 4 (33.33%) JavaScript
4 3 (25.00%) Java
5 2 (16.67%) T-SQL
6 1 (8.33%) VBA
6 1 (8.33%) PL/SQL
Vendors
1 3 (25.00%) Oracle
1 3 (25.00%) Microsoft
1 3 (25.00%) Infragistics
2 2 (16.67%) Google
3 1 (8.33%) Red Gate
3 1 (8.33%) Telerik
3 1 (8.33%) Reuters
3 1 (8.33%) Bloomberg
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