The following table provides summary statistics for contract job vacancies with a requirement for Inversion of Control skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Inversion of Control over the 3 months to 23 March 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.

3 months to
23 Mar 2017
Same period 2016 Same period 2015
Inversion of Control (IoC)
UK
Rank 539 570 563
Rank change year-on-year +31 -7  
Contract jobs citing Inversion of Control 60 58 58
As % of all contract IT jobs advertised in the UK 0.13% 0.11% 0.11%
As % of the Processes & Methodologies category 0.16% 0.13% 0.14%
Number of daily rates quoted 44 46 42
Median daily rate £360 £400 £425
Median daily rate % change year-on-year -10.00% -5.88%  
90% offered a daily rate of more than £320 £250 £300
10% offered a daily rate of more than £488 £525 £500
UK excluding London median daily rate £378 £375 £408
% change year-on-year +0.66% -7.97%  
Number of hourly rates quoted 1 0 0
Median hourly rate £40.50 - -
UK excluding London median hourly rate £40.50 - -

Inversion of Control is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies with a requirement for process and methodology skills.

Contract Process & Methodology Skills
UK
Contract job vacancies with a requirement for process and methodology skills 37155 43761 41746
As % of all contract IT job vacancies advertised in the UK 83.08% 82.85% 79.73%
Number of daily rates quoted 24488 28705 25865
Median daily rate £450 £425 £420
Median daily rate % change year-on-year +5.88% +1.19%  
90% offered a daily rate of more than £300 £300 £275
10% offered a daily rate of more than £600 £600 £575
UK excluding London median daily rate £410 £400 £399
% change year-on-year +2.50% +0.29%  
Number of hourly rates quoted 940 1103 1195
Median hourly rate £35.00 £37.50 £27.50
Median hourly rate % change year-on-year -6.66% +36.36%  
90% offered a hourly rate of more than £13.00 £13.00 £12.10
10% offered a hourly rate of more than £53.00 £55.00 £49.50
UK excluding London median hourly rate £36.00 £39.00 £30.00
% change year-on-year -7.69% +30.00%  

Inversion of Control
Job Vacancy Trend

The job posting trend of jobs advertised citing Inversion of Control as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for Inversion of Control in the UK

Inversion of Control
Contractor Daily Rate Trend

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

Contractor daily rate trend for Inversion of Control in the UK

Inversion of Control
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing Inversion of Control over the 3 months to 23 March 2017.

Contractor daily rate histogram for Inversion of Control in the UK

Inversion of Control
Contractor Hourly Rate Trend

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

Contractor hourly rate trend for Inversion of Control in the UK

Inversion of Control
Top 30 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Inversion of Control within the UK over the 3 months to 23 March 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 +35 55 £360 -10.00% 45
London +11 31 £359 -13.03% 18
West Midlands +15 5 £515 +11.35% 4
North West +24 4 £340 +4.61% 8
Coventry +1 4 £563 +21.62%
Wales +12 3 £250 +47.92% 1
South East +10 3 £400 +6.66% 7
City of London 0 3 £483 +83.80% 2
East of England -3 3 £394 +5.00% 4
East Midlands - 3 £320 -
North East - 3 £385 -
South Yorkshire - 3 £348 -
Yorkshire - 3 £348 - 1
Tyne and Wear - 3 £385 -
Newcastle upon Tyne - 3 £385 -
Sheffield - 3 £348 -
Cheshire - 3 £339 - 2
Hampshire - 3 £400 - 1
Swansea - 2 - -
West Wales - 2 - -
Manchester +19 1 £375 +15.38% 4
South Wales +14 1 £250 +47.92% 1
Hertfordshire -4 1 £363 - 1
Northamptonshire - 1 - -
Cambridgeshire - 1 £425 - 3
Northampton - 1 - -
Knutsford - 1 £338 -
Andover - 1 £400 - 1
Basingstoke - 1 - -
Birmingham - 1 £400 - 2

Inversion of Control
Top 30 Related IT Skills

For the 6 months to 23 March 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 with a requirement for Inversion of Control.

1 81 (68.64%) .NET
1 81 (68.64%) Agile Software Development
2 75 (63.56%) C#
3 63 (53.39%) MVC
4 62 (52.54%) SQL
5 53 (44.92%) TDD
6 45 (38.14%) Git (software)
7 44 (37.29%) Team Foundation Server
8 43 (36.44%) Dependency Injection
9 42 (35.59%) SQL Server
10 37 (31.36%) ASP.NET
11 36 (30.51%) Finance
11 36 (30.51%) Microsoft
12 35 (29.66%) JavaScript
12 35 (29.66%) T-SQL
12 35 (29.66%) Microsoft Azure
13 33 (27.97%) REST
14 32 (27.12%) Spring
14 32 (27.12%) Java
15 31 (26.27%) WCF
15 31 (26.27%) jQuery
16 29 (24.58%) PowerShell
17 28 (23.73%) Scrum
17 28 (23.73%) .NET Framework
17 28 (23.73%) Entity Framework
18 26 (22.03%) BDD
18 26 (22.03%) ASP.NET MVC
18 26 (22.03%) Web Services
19 25 (21.19%) ASP.NET Web API
20 24 (20.34%) Visual Studio

Inversion of Control
Top Related 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 14 (11.86%) Tomcat
2 8 (6.78%) Jetty
3 7 (5.93%) IIS
3 7 (5.93%) JBoss
3 7 (5.93%) WebLogic
4 6 (5.08%) WebSphere
5 5 (4.24%) Apache
6 4 (3.39%) Apache Spark
6 4 (3.39%) NServiceBus
7 3 (2.54%) GlassFish
7 3 (2.54%) MS Project Server
7 3 (2.54%) Oracle SOA Suite
7 3 (2.54%) SharePoint
7 3 (2.54%) SharePoint 2010
7 3 (2.54%) SharePoint 2013
7 3 (2.54%) WebLogic Integration
7 3 (2.54%) WebLogic Portal
7 3 (2.54%) WebSphere Application Server
7 3 (2.54%) WebSphere Process Server
8 2 (1.69%) Elasticsearch
Applications
1 18 (15.25%) MS Excel
2 3 (2.54%) MS Project
3 2 (1.69%) Spreadsheet
Business Applications
1 3 (2.54%) Oracle BPM
2 1 (0.85%) Unit4 Business World
Cloud Services
1 35 (29.66%) Microsoft Azure
2 10 (8.47%) Amazon AWS
3 6 (5.08%) Amazon EC2
3 6 (5.08%) Amazon S3
3 6 (5.08%) AWS CloudFormation
4 4 (3.39%) PaaS
5 2 (1.69%) IaaS
6 1 (0.85%) Asana
6 1 (0.85%) AWS Lambda
6 1 (0.85%) G Suite
6 1 (0.85%) Google App Engine
6 1 (0.85%) Google Cloud Platform
6 1 (0.85%) OpenShift
6 1 (0.85%) SaaS
Communications & Networking
1 2 (1.69%) DNS
1 2 (1.69%) HTTP
1 2 (1.69%) Kerberos
2 1 (0.85%) Internet
2 1 (0.85%) Intranet
2 1 (0.85%) SSL
Database & Business Intelligence
1 42 (35.59%) SQL Server
2 15 (12.71%) NoSQL
3 12 (10.17%) RDBMS
3 12 (10.17%) Relational Database
4 11 (9.32%) SQL Server Integration Services
4 11 (9.32%) SQL Server Reporting Services
5 9 (7.63%) MongoDB
5 9 (7.63%) SQL Server 2008
5 9 (7.63%) SQL Server Analysis Services
6 8 (6.78%) SQL Server 2012
7 6 (5.08%) MySQL
8 5 (4.24%) Hadoop
8 5 (4.24%) PostgreSQL
8 5 (4.24%) SQLite
9 4 (3.39%) Azure SQL Database
10 3 (2.54%) DB2
10 3 (2.54%) Oracle Database
10 3 (2.54%) SQL Server 2016
11 2 (1.69%) SQL Server 2014
12 1 (0.85%) DocumentDB
Development Applications
1 45 (38.14%) Git (software)
2 44 (37.29%) Team Foundation Server
3 24 (20.34%) Visual Studio
4 23 (19.49%) NUnit
5 19 (16.10%) Jenkins
6 17 (14.41%) Maven
7 16 (13.56%) MSBuild
8 12 (10.17%) Hudson
8 12 (10.17%) JUnit
8 12 (10.17%) MSTest
9 11 (9.32%) CruiseControl
10 9 (7.63%) Build Forge
10 9 (7.63%) Moq
11 8 (6.78%) TeamCity
12 7 (5.93%) Gradle
12 7 (5.93%) SpecFlow
13 5 (4.24%) Ant
13 5 (4.24%) Octopus Deploy
13 5 (4.24%) TestNG
14 4 (3.39%) ReSharper
General
1 36 (30.51%) Finance
2 10 (8.47%) Banking
3 4 (3.39%) Front Office
4 3 (2.54%) Retail
5 2 (1.69%) Games
5 2 (1.69%) Investment Banking
5 2 (1.69%) Prime Brokerage
6 1 (0.85%) Multimedia
Job Titles
1 97 (82.20%) Developer
2 44 (37.29%) .NET Developer
3 39 (33.05%) C# Developer
4 29 (24.58%) Java Developer
5 22 (18.64%) Senior Developer
6 21 (17.80%) C# .NET Developer
7 18 (15.25%) SQL Developer
8 17 (14.41%) Software Engineer
9 14 (11.86%) Software Developer
10 12 (10.17%) Senior .NET Developer
11 11 (9.32%) Architect
11 11 (9.32%) C# Software Developer
12 10 (8.47%) C# Software Engineer
12 10 (8.47%) Developer/Software Engineer
12 10 (8.47%) Monitoring Engineer
12 10 (8.47%) Programmer
12 10 (8.47%) Senior Java Developer
12 10 (8.47%) SQL Server Developer
13 9 (7.63%) C# Programmer
13 9 (7.63%) Software Programmer
Libraries, Frameworks & Software Standards
1 81 (68.64%) .NET
2 37 (31.36%) ASP.NET
3 33 (27.97%) REST
4 32 (27.12%) Spring
5 31 (26.27%) jQuery
5 31 (26.27%) WCF
6 28 (23.73%) .NET Framework
6 28 (23.73%) Entity Framework
7 26 (22.03%) ASP.NET MVC
7 26 (22.03%) Web Services
8 25 (21.19%) ASP.NET Web API
9 21 (17.80%) Hibernate
9 21 (17.80%) J2EE
10 20 (16.95%) AngularJS
10 20 (16.95%) JPA
11 19 (16.10%) RESTful
12 18 (15.25%) HTML
13 16 (13.56%) CSS
13 16 (13.56%) Unity DI Container
14 15 (12.71%) Elastic Stack
Miscellaneous
1 20 (16.95%) Analytical Skills
2 10 (8.47%) Mobile App
3 9 (7.63%) Computer Science
4 7 (5.93%) Derivative
5 3 (2.54%) DataPower
5 3 (2.54%) Enterprise Software
5 3 (2.54%) User Experience
6 2 (1.69%) Clustering
6 2 (1.69%) NHS
7 1 (0.85%) Animation
7 1 (0.85%) Equity Derivative
7 1 (0.85%) Fintech
7 1 (0.85%) Foreign Exchange (FX)
7 1 (0.85%) N-Tier
7 1 (0.85%) W3C
Operating Systems
1 23 (19.49%) Linux
2 21 (17.80%) Windows
3 15 (12.71%) Ubuntu
4 8 (6.78%) Unix
5 2 (1.69%) Android
5 2 (1.69%) Apple iOS
5 2 (1.69%) Windows Server
Processes & Methodologies
1 81 (68.64%) Agile Software Development
2 63 (53.39%) MVC
3 53 (44.92%) TDD
4 43 (36.44%) Dependency Injection
5 28 (23.73%) Scrum
6 26 (22.03%) BDD
7 23 (19.49%) Continuous Integration
8 22 (18.64%) Software Engineering
9 21 (17.80%) SOLID
10 17 (14.41%) Mentoring
10 17 (14.41%) Unit Testing
11 16 (13.56%) Web Development
12 15 (12.71%) Load Balancing
13 13 (11.02%) Business Analysis
13 13 (11.02%) OO
14 12 (10.17%) DevOps
14 12 (10.17%) SDLC
15 10 (8.47%) OOP
15 10 (8.47%) Test Automation
16 8 (6.78%) Domain-Driven Design
Programming Languages
1 75 (63.56%) C#
2 62 (52.54%) SQL
3 35 (29.66%) JavaScript
3 35 (29.66%) T-SQL
4 32 (27.12%) Java
5 29 (24.58%) PowerShell
6 10 (8.47%) VBA
7 9 (7.63%) TypeScript
8 6 (5.08%) VB
9 5 (4.24%) Bash Shell
10 4 (3.39%) C
10 4 (3.39%) Python
10 4 (3.39%) VB.NET
10 4 (3.39%) VB6
11 3 (2.54%) Perl
11 3 (2.54%) PL/SQL
12 1 (0.85%) C++
12 1 (0.85%) MATLAB
12 1 (0.85%) Objective-C
12 1 (0.85%) Ruby
Qualifications
1 11 (9.32%) Degree
2 2 (1.69%) Security Cleared
3 1 (0.85%) SC Cleared
Quality Assurance & Compliance
1 6 (5.08%) QA
2 1 (0.85%) Dodd-Frank
2 1 (0.85%) EMIR
System Software
1 5 (4.24%) Docker
2 1 (0.85%) Virtual Machines
Systems Management
1 3 (2.54%) Opscode Chef
1 3 (2.54%) Puppet
2 2 (1.69%) Kubernetes
3 1 (0.85%) Ansible
3 1 (0.85%) Marathon
3 1 (0.85%) Mesos
Vendors
1 36 (30.51%) Microsoft
2 11 (9.32%) Oracle
3 10 (8.47%) TIBCO
4 4 (3.39%) IBM
5 3 (2.54%) Google
5 3 (2.54%) Kony
5 3 (2.54%) Sybase
5 3 (2.54%) Telerik
6 2 (1.69%) DevExpress
6 2 (1.69%) Xamarin
6 2 (1.69%) Yahoo!
7 1 (0.85%) Apigee
7 1 (0.85%) Apple
7 1 (0.85%) CA
7 1 (0.85%) Sitecore
7 1 (0.85%) Twitter
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