The following table provides summary statistics for contract job vacancies advertised in Leatherhead 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 28 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)
Surrey / Leatherhead
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 8 33 33
Rank change year-on-year +25 0  
Contract jobs citing TDD 4 1 1
As % of all contract IT jobs advertised in Leatherhead 8.00% 0.90% 0.91%
As % of the Processes & Methodologies category 8.89% 1.01% 1.28%
Number of daily rates quoted 4 1 0
Median daily rate £365 £400 -
Median daily rate % change year-on-year -8.75% -  
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 1
Median hourly rate - - £40.00
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 Leatherhead with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Leatherhead
Contract job vacancies with a requirement for process and methodology skills 45 99 78
As % of all contract IT job vacancies advertised in Leatherhead 90.00% 89.19% 70.91%
Number of daily rates quoted 129 278 261
Median daily rate £400 £450 £403
Median daily rate % change year-on-year -11.11% +11.80%  
90% offered a daily rate of more than £300 £363 £343
10% offered a daily rate of more than £575 £529 £525
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 0 0 8
Median hourly rate - - £18.50
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 Leatherhead

Job postings citing TDD as a percentage of all IT jobs advertised in Leatherhead.

Job vacancy trend for TDD in Leatherhead

TDD
Contractor Daily Rate Trend in Leatherhead

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

Contractor daily rate trend for TDD in Leatherhead

For the 6 months to 28 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 Leatherhead region with a requirement for TDD.

1 12 (92.31%) C#
1 12 (92.31%) .NET
1 12 (92.31%) AngularJS
2 11 (84.62%) SOLID
2 11 (84.62%) Agile Software Development
2 11 (84.62%) HTML
2 11 (84.62%) CSS
2 11 (84.62%) Web Services
2 11 (84.62%) SOA
2 11 (84.62%) WCF
2 11 (84.62%) Domain-Driven Design
3 10 (76.92%) JSUnit
3 10 (76.92%) Unit Testing
3 10 (76.92%) .NET Framework
3 10 (76.92%) HTML5
3 10 (76.92%) Entity Framework
3 10 (76.92%) REST
3 10 (76.92%) MSMQ
3 10 (76.92%) JavaScript
3 10 (76.92%) T-SQL
3 10 (76.92%) NServiceBus
3 10 (76.92%) ASP.NET Web API
4 9 (69.23%) SaaS
5 8 (61.54%) Change Management
5 8 (61.54%) SQL Server
5 8 (61.54%) Microsoft
6 7 (53.85%) PowerShell
6 7 (53.85%) Microsoft Azure
6 7 (53.85%) DevOps
6 7 (53.85%) LESS

TDD
Co-occurring IT Skills in Leatherhead 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 10 (76.92%) NServiceBus
2 1 (7.69%) CMS
2 1 (7.69%) IIS
Cloud Services
1 9 (69.23%) SaaS
2 7 (53.85%) Microsoft Azure
3 1 (7.69%) Amazon AWS
Database & Business Intelligence
1 8 (61.54%) SQL Server
2 6 (46.15%) Azure SQL Database
3 1 (7.69%) Apache Cassandra
3 1 (7.69%) Couchbase
3 1 (7.69%) CouchDB
3 1 (7.69%) Event Store
3 1 (7.69%) NoSQL
3 1 (7.69%) RavenDB
3 1 (7.69%) Redis
3 1 (7.69%) SQL Server 2012
Development Applications
1 10 (76.92%) JSUnit
2 6 (46.15%) GoCD
3 3 (23.08%) PostCSS
4 2 (15.38%) TeamCity
5 1 (7.69%) Git (software)
5 1 (7.69%) JIRA
5 1 (7.69%) Team Foundation Server
General
1 5 (38.46%) Finance
2 1 (7.69%) Games
Job Titles
1 12 (92.31%) Developer
2 11 (84.62%) C# Developer
3 10 (76.92%) .NET Developer
4 9 (69.23%) C# .NET Developer
5 5 (38.46%) Angular Developer
6 4 (30.77%) Senior C# Developer
6 4 (30.77%) Senior Developer
7 3 (23.08%) ASP.NET Developer
7 3 (23.08%) C# ASP.NET Developer
7 3 (23.08%) Senior .NET Developer
7 3 (23.08%) Senior ASP.NET Developer
7 3 (23.08%) Senior C# .NET Developer
7 3 (23.08%) Senior C# ASP.NET Developer
8 2 (15.38%) .NET Web Developer
8 2 (15.38%) Agile .NET Developer
8 2 (15.38%) Agile C# Developer
8 2 (15.38%) Agile Developer
8 2 (15.38%) C# WCF Developer
8 2 (15.38%) C# Web Developer
8 2 (15.38%) WCF Developer
Libraries, Frameworks & Software Standards
1 12 (92.31%) .NET
1 12 (92.31%) AngularJS
2 11 (84.62%) CSS
2 11 (84.62%) HTML
2 11 (84.62%) WCF
2 11 (84.62%) Web Services
3 10 (76.92%) .NET Framework
3 10 (76.92%) ASP.NET Web API
3 10 (76.92%) Entity Framework
3 10 (76.92%) HTML5
3 10 (76.92%) MSMQ
3 10 (76.92%) REST
4 7 (53.85%) LESS
5 4 (30.77%) ASP.NET
6 3 (23.08%) Angular 2
6 3 (23.08%) CSS3
6 3 (23.08%) RESTful
6 3 (23.08%) Sass
7 1 (7.69%) ASP.NET MVC 4
7 1 (7.69%) RxJS
Miscellaneous
1 2 (15.38%) User Experience
Operating Systems
1 1 (7.69%) Windows
1 1 (7.69%) Windows Server
1 1 (7.69%) Windows Server 2012
Processes & Methodologies
1 11 (84.62%) Agile Software Development
1 11 (84.62%) Domain-Driven Design
1 11 (84.62%) SOA
1 11 (84.62%) SOLID
2 10 (76.92%) Unit Testing
3 8 (61.54%) Change Management
4 7 (53.85%) DevOps
4 7 (53.85%) Performance Tuning
5 4 (30.77%) Software Engineering
6 3 (23.08%) Front End Development
7 2 (15.38%) MVC
7 2 (15.38%) Web Development
8 1 (7.69%) Continuous Improvement
8 1 (7.69%) Continuous Integration
8 1 (7.69%) DSDM
8 1 (7.69%) Feature Driven Development
8 1 (7.69%) Kanban
8 1 (7.69%) Mentoring
8 1 (7.69%) Scrum
8 1 (7.69%) Test Automation
Programming Languages
1 12 (92.31%) C#
2 10 (76.92%) JavaScript
2 10 (76.92%) T-SQL
3 7 (53.85%) PowerShell
4 6 (46.15%) SQL
5 3 (23.08%) ECMAScript
5 3 (23.08%) TypeScript
System Software
1 1 (7.69%) Docker
Systems Management
1 1 (7.69%) Opscode Chef
1 1 (7.69%) Puppet
Vendors
1 8 (61.54%) Microsoft