The following table provides summary statistics for contract job vacancies advertised in Slough with a requirement for TDD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited TDD over the 3 months to 26 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.

Test-Driven Development (TDD)
Berkshire / Slough
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 17 24 28
Rank change year-on-year +7 +4  
Contract jobs citing TDD 5 2 5
As % of all contract IT jobs advertised in Slough 3.55% 1.30% 1.81%
As % of the Processes & Methodologies category 4.39% 1.71% 2.11%
Number of daily rates quoted 5 2 4
Median daily rate £375 £350 £415
Median daily rate % change year-on-year +7.14% -15.71%  
90% offered a daily rate of more than £349 £330 £348
10% offered a daily rate of more than £449 £370 £486
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £40.00 £43.75
% change year-on-year +3.75% -8.57%  

TDD 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 advertised in Slough with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Slough
Contract job vacancies with a requirement for process and methodology skills 114 117 237
As % of all contract IT job vacancies advertised in Slough 80.85% 75.97% 85.87%
Number of daily rates quoted 81 79 142
Median daily rate £419 £413 £366
Median daily rate % change year-on-year +1.51% +12.78%  
90% offered a daily rate of more than £284 £300 £203
10% offered a daily rate of more than £550 £471 £500
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 4 4 6
Median hourly rate £14.00 £12.50 £18.50
Median hourly rate % change year-on-year +12.00% -32.43%  
90% offered a hourly rate of more than £13.96 £11.10 £18.00
10% offered a hourly rate of more than £17.50 £15.00 £175.00
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in Slough

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

Job vacancy trend for TDD in Slough

TDD
Contractor Daily Rate Trend in Slough

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

Contractor daily rate trend for TDD in Slough

TDD
Contractor Daily Rate Histogram in Slough

The daily rate distribution of IT jobs citing TDD in Slough over the 3 months to 26 June 2017.

Contractor daily rate histogram for TDD in Slough

For the 6 months to 26 June 2017, IT contractor jobs citing TDD 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 Slough region with a requirement for TDD.

1 8 (100.00%) Agile Software Development
2 4 (50.00%) MVC
2 4 (50.00%) Scrum
2 4 (50.00%) C#
2 4 (50.00%) .NET
2 4 (50.00%) ASP.NET
2 4 (50.00%) ASP.NET MVC
3 3 (37.50%) Continuous Integration
3 3 (37.50%) .NET Framework
3 3 (37.50%) RESTful
3 3 (37.50%) Entity Framework
3 3 (37.50%) AngularJS
4 2 (25.00%) Virtual Team Management
4 2 (25.00%) Virtual Team
4 2 (25.00%) CA Agile Central
4 2 (25.00%) SOLID
4 2 (25.00%) AutoMapper
4 2 (25.00%) ASP.NET Web API
4 2 (25.00%) Octopus Deploy
4 2 (25.00%) SQL Server 2012
4 2 (25.00%) Continuous Improvement
4 2 (25.00%) Process Improvement
4 2 (25.00%) Big Data
4 2 (25.00%) TeamCity
4 2 (25.00%) Pentaho
4 2 (25.00%) Finance
4 2 (25.00%) Project Management
4 2 (25.00%) PMI
4 2 (25.00%) PMP
4 2 (25.00%) PMI Certification

TDD
Co-occurring IT Skills in Slough 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:

Communications & Networking
1 1 (12.50%) Extranet
1 1 (12.50%) Intranet
1 1 (12.50%) Skype
Database & Business Intelligence
1 2 (25.00%) Big Data
1 2 (25.00%) Pentaho
1 2 (25.00%) SQL Server
1 2 (25.00%) SQL Server 2012
2 1 (12.50%) MongoDB
2 1 (12.50%) SQL Server 2008
2 1 (12.50%) SQL Server Analysis Services
2 1 (12.50%) SQL Server Integration Services
2 1 (12.50%) SQL Server Reporting Services
Development Applications
1 2 (25.00%) JIRA
1 2 (25.00%) Maven
1 2 (25.00%) Octopus Deploy
1 2 (25.00%) ReSharper
1 2 (25.00%) TeamCity
2 1 (12.50%) Git (software)
2 1 (12.50%) Jenkins
2 1 (12.50%) JUnit
2 1 (12.50%) Moq
2 1 (12.50%) SoapUI
General
1 2 (25.00%) Finance
2 1 (12.50%) Marketing
Job Titles
1 5 (62.50%) Developer
2 3 (37.50%) .NET Developer
2 3 (37.50%) ASP.NET Developer
2 3 (37.50%) ASP.NET MVC Developer
3 2 (25.00%) C# Developer
3 2 (25.00%) Development Manager
3 2 (25.00%) Technical Development Manager
3 2 (25.00%) Technical Manager
4 1 (12.50%) C# .NET Developer
4 1 (12.50%) C# ASP.NET Developer
4 1 (12.50%) C# Software Developer
4 1 (12.50%) Java Developer
4 1 (12.50%) Lead DevOps
4 1 (12.50%) Senior Developer
4 1 (12.50%) Senior Java Developer
4 1 (12.50%) Software Developer
4 1 (12.50%) SQL Developer
4 1 (12.50%) Technical Design Leader
4 1 (12.50%) Technical Leader
4 1 (12.50%) T-SQL Developer
Libraries, Frameworks & Software Standards
1 4 (50.00%) .NET
1 4 (50.00%) ASP.NET
1 4 (50.00%) ASP.NET MVC
2 3 (37.50%) .NET Framework
2 3 (37.50%) AngularJS
2 3 (37.50%) Entity Framework
2 3 (37.50%) RESTful
3 2 (25.00%) ASP.NET Web API
3 2 (25.00%) AutoMapper
3 2 (25.00%) Velocity
4 1 (12.50%) ASP.NET MVC 5
4 1 (12.50%) ASP.NET Web Forms
4 1 (12.50%) HTML5
4 1 (12.50%) JAX-RS
4 1 (12.50%) JPA
4 1 (12.50%) jQuery
4 1 (12.50%) RabbitMQ
4 1 (12.50%) Razor View Engine
4 1 (12.50%) REST
4 1 (12.50%) Spring Boot
Miscellaneous
1 2 (25.00%) PMI
1 2 (25.00%) Virtual Team
2 1 (12.50%) Mobile App
Operating Systems
1 1 (12.50%) Android
Processes & Methodologies
1 8 (100.00%) Agile Software Development
2 4 (50.00%) MVC
2 4 (50.00%) Scrum
3 3 (37.50%) Continuous Integration
4 2 (25.00%) Continuous Improvement
4 2 (25.00%) DSDM
4 2 (25.00%) Process Improvement
4 2 (25.00%) Project Management
4 2 (25.00%) Refactoring
4 2 (25.00%) SOLID
4 2 (25.00%) Virtual Team Management
5 1 (12.50%) Analytics
5 1 (12.50%) Android Development
5 1 (12.50%) API Integration
5 1 (12.50%) BDD
5 1 (12.50%) Data Analytics
5 1 (12.50%) Dependency Injection
5 1 (12.50%) DevOps
5 1 (12.50%) Mobile Application Development
5 1 (12.50%) Service Design
Programming Languages
1 4 (50.00%) C#
2 2 (25.00%) Java
2 2 (25.00%) SQL
3 1 (12.50%) JavaScript
3 1 (12.50%) T-SQL
Qualifications
1 2 (25.00%) PMI Certification
1 2 (25.00%) PMP
Vendors
1 2 (25.00%) CA Agile Central
2 1 (12.50%) Apple