The following table provides summary statistics for contract job vacancies advertised in Warrington 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)
Cheshire / Warrington
3 months to
26 Jun 2017
Same period 2016 Same period 2015
Rank 17 28 30
Rank change year-on-year +11 +2  
Contract jobs citing TDD 6 16 4
As % of all contract IT jobs advertised in Warrington 4.55% 4.91% 2.09%
As % of the Processes & Methodologies category 5.17% 5.46% 2.67%
Number of daily rates quoted 4 15 2
Median daily rate £361 £465 £425
Median daily rate % change year-on-year -22.31% +9.41%  
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 Warrington with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Warrington
Contract job vacancies with a requirement for process and methodology skills 116 293 150
As % of all contract IT job vacancies advertised in Warrington 87.88% 89.88% 78.53%
Number of daily rates quoted 69 224 109
Median daily rate £388 £483 £400
Median daily rate % change year-on-year -19.68% +20.62%  
90% offered a daily rate of more than £282 £350 £300
10% offered a daily rate of more than £600 £650 £650
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 16 5 9
Median hourly rate £55.00 £62.50 £17.50
Median hourly rate % change year-on-year -12.00% +257.14%  
90% offered a hourly rate of more than £30.00 £15.00 £12.50
10% offered a hourly rate of more than £65.00 £62.50 £35.00
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 Warrington

The job posting trend of jobs advertised in Warrington 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 Warrington

TDD
Contractor Daily Rate Trend in Warrington

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

Contractor daily rate trend for TDD in Warrington

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 Warrington region with a requirement for TDD.

1 7 (77.78%) Agile Software Development
2 6 (66.67%) MVC
2 6 (66.67%) C#
2 6 (66.67%) SQL
2 6 (66.67%) .NET
2 6 (66.67%) AngularJS
2 6 (66.67%) ASP.NET Web API
3 5 (55.56%) ASP.NET
3 5 (55.56%) .NET Framework
4 4 (44.44%) JSON
4 4 (44.44%) Continuous Integration
4 4 (44.44%) SQL Server Reporting Services
4 4 (44.44%) jQuery
4 4 (44.44%) BDD
4 4 (44.44%) Microsoft
4 4 (44.44%) SQL Server
4 4 (44.44%) T-SQL
5 3 (33.33%) JavaScript
5 3 (33.33%) CSS
5 3 (33.33%) SharePoint
5 3 (33.33%) Finance
5 3 (33.33%) Scrum
5 3 (33.33%) BizTalk Server
5 3 (33.33%) ASP.NET MVC
5 3 (33.33%) DevExpress
5 3 (33.33%) RESTful
5 3 (33.33%) Business Analysis
5 3 (33.33%) WCF
5 3 (33.33%) KnockoutJS
5 3 (33.33%) User Stories

TDD
Co-occurring IT Skills in Warrington 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 (33.33%) BizTalk Server
1 3 (33.33%) SharePoint
2 1 (11.11%) Confluence
Applications
1 1 (11.11%) Fireworks
1 1 (11.11%) MS Visio
1 1 (11.11%) Photoshop
Cloud Services
1 1 (11.11%) Trello
Database & Business Intelligence
1 4 (44.44%) SQL Server
1 4 (44.44%) SQL Server Reporting Services
2 2 (22.22%) MongoDB
2 2 (22.22%) NoSQL
2 2 (22.22%) SQL Server Analysis Services
2 2 (22.22%) SQL Server Integration Services
3 1 (11.11%) SQL Server 2008
3 1 (11.11%) SQL Server 2012
3 1 (11.11%) SQL Server 2014
Development Applications
1 2 (22.22%) Team Foundation Server
1 2 (22.22%) TeamCity
2 1 (11.11%) Git (software)
2 1 (11.11%) JIRA
2 1 (11.11%) Moq
General
1 3 (33.33%) Finance
2 1 (11.11%) Banking
Job Titles
1 8 (88.89%) Developer
2 5 (55.56%) .NET Developer
3 2 (22.22%) ASP.NET Developer
3 2 (22.22%) SQL Developer
4 1 (11.11%) Agile Business Analyst
4 1 (11.11%) Analyst
4 1 (11.11%) ASP.NET MVC Developer
4 1 (11.11%) Business Analyst
4 1 (11.11%) C# .NET Developer
4 1 (11.11%) C# Developer
4 1 (11.11%) ETL Developer
4 1 (11.11%) Front End Developer (Client-Side Developer)
4 1 (11.11%) Front End Web Developer (Client-Side Developer)
4 1 (11.11%) Senior Developer
4 1 (11.11%) Senior ETL Developer
4 1 (11.11%) Software Developer
4 1 (11.11%) SSIS Developer
4 1 (11.11%) T-SQL Developer
4 1 (11.11%) Web Developer
4 1 (11.11%) Web Engineer
Libraries, Frameworks & Software Standards
1 6 (66.67%) .NET
1 6 (66.67%) AngularJS
1 6 (66.67%) ASP.NET Web API
2 5 (55.56%) .NET Framework
2 5 (55.56%) ASP.NET
3 4 (44.44%) jQuery
3 4 (44.44%) JSON
4 3 (33.33%) ASP.NET MVC
4 3 (33.33%) CSS
4 3 (33.33%) Entity Framework
4 3 (33.33%) KnockoutJS
4 3 (33.33%) REST
4 3 (33.33%) RESTful
4 3 (33.33%) WCF
5 2 (22.22%) .NET Core
5 2 (22.22%) ASP.NET Core
5 2 (22.22%) HTML
6 1 (11.11%) ASP.NET Web Forms
6 1 (11.11%) Express
6 1 (11.11%) HTML5
Miscellaneous
1 1 (11.11%) Replication
1 1 (11.11%) User Experience
Processes & Methodologies
1 7 (77.78%) Agile Software Development
2 6 (66.67%) MVC
3 4 (44.44%) BDD
3 4 (44.44%) Continuous Integration
4 3 (33.33%) Business Analysis
4 3 (33.33%) Scrum
4 3 (33.33%) User Stories
5 2 (22.22%) Continuous Improvement
5 2 (22.22%) DevOps
5 2 (22.22%) OO
5 2 (22.22%) Web Development
6 1 (11.11%) Front End Development
6 1 (11.11%) High Availability
6 1 (11.11%) Infrastructure Management
6 1 (11.11%) Performance Tuning
6 1 (11.11%) SDLC
6 1 (11.11%) SFIA
6 1 (11.11%) Software Delivery
6 1 (11.11%) SOLID
6 1 (11.11%) Stakeholder Engagement
Programming Languages
1 6 (66.67%) C#
1 6 (66.67%) SQL
2 4 (44.44%) T-SQL
3 3 (33.33%) JavaScript
4 1 (11.11%) C
Qualifications
1 1 (11.11%) ISEB
Systems Management
1 1 (11.11%) AirWatch
Vendors
1 4 (44.44%) Microsoft
2 3 (33.33%) DevExpress
3 1 (11.11%) Apple