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 contractor rates offered in IT contracts that have cited Inversion of Control over the 3 months to 17 January 2017 with a comparison to the same period over 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.

3 months to
17 Jan 2017
Same period 2016 Same period 2015
Inversion of Control (IoC)
London / City of London
Rank 152 147 182
Rank change year-on-year
-5 +35
Contract jobs citing Inversion of Control 4 3 7
As % of all contract IT jobs located in the City of London 0.14% 0.10% 0.14%
As % of the Miscellaneous category 0.36% 0.25% 0.36%
Number of daily rates quoted 2 3 6
Median daily rate £345 £475 £430
Median daily rate % change year-on-year
-27.36% +10.49%
90% offered a daily rate of more than £341 £359 £375
10% offered a daily rate of more than £349 £535 £493
UK excluding London median daily rate £338 £325 £350
% change year-on-year
+3.84% -7.14%
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £40.50 - -

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
1120 1214 1942
As % of all contract IT jobs located in the City of London 38.51% 40.47% 38.59%
Number of daily rates quoted 837 926 1529
Median daily rate £500 £500 £475
Median daily rate % change year-on-year
- +5.26%
90% offered a daily rate of more than £326 £300 £300
10% offered a daily rate of more than £650 £650 £625
UK excluding London median daily rate £394 £375 £365
% change year-on-year
+4.93% +2.73%
Number of hourly rates quoted 10 20 27
Median hourly rate £21.75 £20.00 £17.50
Median hourly rate % change year-on-year
+8.75% +14.28%
90% offered a hourly rate of more than £16.15 £13.00 £13.38
10% offered a hourly rate of more than £55.00 £35.60 £22.13
UK excluding London median hourly rate £18.71 £21.50 £17.50
% change year-on-year
-12.96% +22.85%

Inversion of Control
Jobs Demand Trend in the City of London

The demand trend of contract jobs across the City of London region citing Inversion of Control as a proportion of all IT contracts with a match in 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 January 2017, IT contractor jobs citing Inversion of Control 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 City of London region with a requirement for Inversion of Control.

1 11 (73.33%) .NET
2 10 (66.67%) C#
2 10 (66.67%) JSON
2 10 (66.67%) Dependency Injection
2 10 (66.67%) REST
3 9 (60.00%) Java
3 9 (60.00%) MVC
3 9 (60.00%) Finance
3 9 (60.00%) TDD
3 9 (60.00%) Spring
4 8 (53.33%) TIBCO EMS
4 8 (53.33%) CruiseControl
4 8 (53.33%) Hibernate
4 8 (53.33%) J2EE
4 8 (53.33%) JSP
4 8 (53.33%) TIBCO
4 8 (53.33%) Web Services
4 8 (53.33%) Build Forge
4 8 (53.33%) Hudson
4 8 (53.33%) Jenkins
4 8 (53.33%) JPA
4 8 (53.33%) Continuous Integration
5 7 (46.67%) .NET Framework
6 6 (40.00%) Agile Software Development
7 5 (33.33%) Banking
7 5 (33.33%) T-SQL
7 5 (33.33%) Unit Testing
7 5 (33.33%) Spring Boot
8 4 (26.67%) Multithreading
8 4 (26.67%) Low Latency

Inversion of Control
Top Related 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 3 (20.00%) Apache Spark
1 3 (20.00%) IIS
2 1 (6.67%) Tomcat
Cloud Services
1 2 (13.33%) Microsoft Azure
Communications & Networking
1 2 (13.33%) HTTP
Database & Business Intelligence
1 4 (26.67%) SQL Server
2 3 (20.00%) Data Warehouse
2 3 (20.00%) Hadoop
2 3 (20.00%) SQL Server Analysis Services
2 3 (20.00%) SQL Server Integration Services
2 3 (20.00%) SQL Server Reporting Services
3 2 (13.33%) MOLAP
4 1 (6.67%) MySQL
Development Applications
1 8 (53.33%) Build Forge
1 8 (53.33%) CruiseControl
1 8 (53.33%) Hudson
1 8 (53.33%) Jenkins
2 3 (20.00%) Team Foundation Server
3 2 (13.33%) Visual Studio
4 1 (6.67%) NUnit
General
1 9 (60.00%) Finance
2 5 (33.33%) Banking
3 3 (20.00%) Front Office
Job Titles
1 12 (80.00%) Developer
2 9 (60.00%) Java Developer
3 5 (33.33%) Core Java Developer
3 5 (33.33%) Senior Developer
3 5 (33.33%) Senior Java Developer
4 4 (26.67%) C# Developer
5 3 (20.00%) .NET Developer
5 3 (20.00%) Business Intelligence Lead
5 3 (20.00%) C# .NET Developer
5 3 (20.00%) Senior .NET Developer
5 3 (20.00%) Senior C# .NET Developer
5 3 (20.00%) Senior C# Developer
6 2 (13.33%) Architect
6 2 (13.33%) Business Intelligence Developer
6 2 (13.33%) Front Office Developer
6 2 (13.33%) Lead Developer
6 2 (13.33%) Low Latency Java Developer
7 1 (6.67%) J2EE Developer
7 1 (6.67%) Solutions Architect
7 1 (6.67%) SQL Developer
Libraries, Frameworks & Software Standards
1 11 (73.33%) .NET
2 10 (66.67%) JSON
2 10 (66.67%) REST
3 9 (60.00%) Spring
4 8 (53.33%) Hibernate
4 8 (53.33%) J2EE
4 8 (53.33%) JPA
4 8 (53.33%) JSP
4 8 (53.33%) TIBCO EMS
4 8 (53.33%) Web Services
5 7 (46.67%) .NET Framework
6 5 (33.33%) Spring Boot
7 3 (20.00%) Entity Framework
7 3 (20.00%) WPF
8 2 (13.33%) CSS
8 2 (13.33%) jQuery
8 2 (13.33%) SOAP
8 2 (13.33%) WCF
8 2 (13.33%) XML
8 2 (13.33%) XSD
Miscellaneous
1 3 (20.00%) Analytical Skills
1 3 (20.00%) Computer Science
1 3 (20.00%) Derivative
Operating Systems
1 1 (6.67%) Windows
Processes & Methodologies
1 10 (66.67%) Dependency Injection
2 9 (60.00%) MVC
2 9 (60.00%) TDD
3 8 (53.33%) Continuous Integration
4 6 (40.00%) Agile Software Development
5 5 (33.33%) Unit Testing
6 4 (26.67%) Low Latency
6 4 (26.67%) Multithreading
7 3 (20.00%) Business Intelligence
7 3 (20.00%) DSDM
7 3 (20.00%) RUP
7 3 (20.00%) Scrum
7 3 (20.00%) SDLC
7 3 (20.00%) Waterfall
8 2 (13.33%) Asynchronous Programming
8 2 (13.33%) ETL
8 2 (13.33%) Mentoring
8 2 (13.33%) SOLID
9 1 (6.67%) Concurrent Programming
9 1 (6.67%) Memory Management
Programming Languages
1 10 (66.67%) C#
2 9 (60.00%) Java
3 5 (33.33%) T-SQL
4 4 (26.67%) SQL
5 3 (20.00%) Bash Shell
5 3 (20.00%) C
5 3 (20.00%) JavaScript
5 3 (20.00%) PowerShell
5 3 (20.00%) Python
5 3 (20.00%) VBA
Qualifications
1 3 (20.00%) Degree
Quality Assurance & Compliance
1 2 (13.33%) QA
System Software
1 1 (6.67%) Docker
Systems Management
1 1 (6.67%) Kubernetes
1 1 (6.67%) Marathon
1 1 (6.67%) Mesos
Vendors
1 8 (53.33%) TIBCO
2 1 (6.67%) Microsoft