The following table provides summary statistics for contract job vacancies advertised in Northamptonshire 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 29 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)
East Midlands / Northamptonshire
3 months to
29 Jun 2017
Same period 2016 Same period 2015
Rank 27 35 35
Rank change year-on-year +8 0  
Contract jobs citing TDD 15 8 7
As % of all contract IT jobs advertised in Northamptonshire 4.20% 2.12% 1.98%
As % of the Processes & Methodologies category 4.87% 2.42% 2.66%
Number of daily rates quoted 5 6 2
Median daily rate £325 £500 £450
Median daily rate % change year-on-year -35.00% +11.11%  
90% offered a daily rate of more than £309 £375 £408
10% offered a daily rate of more than £396 £544 £513
UK excluding London median daily rate £421 £413 £375
% change year-on-year +1.93% +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 Northamptonshire with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Northamptonshire
Contract job vacancies with a requirement for process and methodology skills 308 330 263
As % of all contract IT job vacancies advertised in Northamptonshire 86.27% 87.53% 74.50%
Number of daily rates quoted 820 711 680
Median daily rate £450 £450 £425
Median daily rate % change year-on-year - +5.88%  
90% offered a daily rate of more than £225 £313 £263
10% offered a daily rate of more than £538 £575 £550
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 8 5 9
Median hourly rate £11.75 £18.75 £19.00
Median hourly rate % change year-on-year -37.33% -1.31%  
90% offered a hourly rate of more than £9.25 £11.25 £15.84
10% offered a hourly rate of more than £68.58 £33.75 £23.75
UK excluding London median hourly rate £33.50 £28.00 £30.00
% change year-on-year +19.64% -6.66%  

TDD
Job Vacancy Trend in Northamptonshire

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

Job vacancy trend for TDD in Northamptonshire

TDD
Contractor Daily Rate Trend in Northamptonshire

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

Contractor daily rate trend for TDD in Northamptonshire

TDD
Contract Job Locations in Northamptonshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Northamptonshire region over the 3 months to 29 June 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
Northampton +6 9 £325 -38.09% 2
TDD
East Midlands

For the 6 months to 29 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 Northamptonshire region with a requirement for TDD.

1 26 (63.41%) Agile Software Development
2 21 (51.22%) .NET
3 19 (46.34%) E-Commerce
4 17 (41.46%) C#
5 15 (36.59%) Java
5 15 (36.59%) XML
6 14 (34.15%) CSS
6 14 (34.15%) HTML
6 14 (34.15%) Git (software)
7 13 (31.71%) Spring
7 13 (31.71%) JSON
7 13 (31.71%) Continuous Integration
7 13 (31.71%) SQL
7 13 (31.71%) JavaScript
8 12 (29.27%) Hibernate
8 12 (29.27%) XSLT
8 12 (29.27%) OO
8 12 (29.27%) JPA
8 12 (29.27%) MongoDB
8 12 (29.27%) Node.js
9 11 (26.83%) Banking
9 11 (26.83%) SOAP
9 11 (26.83%) Finance
10 10 (24.39%) SQL Server
10 10 (24.39%) JUnit
10 10 (24.39%) Test Automation
11 9 (21.95%) Unit Testing
11 9 (21.95%) JProfiler
11 9 (21.95%) Pair Programming
11 9 (21.95%) J2EE

TDD
Co-occurring IT Skills in Northamptonshire 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 2 (4.88%) NServiceBus
2 1 (2.44%) Apache
2 1 (2.44%) GlassFish
2 1 (2.44%) JBoss
2 1 (2.44%) WebLogic
2 1 (2.44%) WebLogic Integration
2 1 (2.44%) WebLogic Portal
2 1 (2.44%) WebSphere
2 1 (2.44%) WebSphere Application Server
2 1 (2.44%) WebSphere Process Server
Business Applications
1 1 (2.44%) Oracle BPM
Cloud Services
1 4 (9.76%) IaaS
1 4 (9.76%) PaaS
Communications & Networking
1 4 (9.76%) DNS
1 4 (9.76%) HTTP
1 4 (9.76%) SSL
1 4 (9.76%) TCP/IP
2 1 (2.44%) Internet
2 1 (2.44%) Intranet
Database & Business Intelligence
1 12 (29.27%) MongoDB
2 10 (24.39%) SQL Server
3 9 (21.95%) RDBMS
3 9 (21.95%) Relational Database
4 2 (4.88%) NoSQL
5 1 (2.44%) Big Data
5 1 (2.44%) DB2
5 1 (2.44%) Oracle Database
Development Applications
1 14 (34.15%) Git (software)
2 10 (24.39%) JUnit
3 9 (21.95%) Eclipse
3 9 (21.95%) Gradle
3 9 (21.95%) IntelliJ
3 9 (21.95%) Jenkins
3 9 (21.95%) JProfiler
4 7 (17.07%) JIRA
5 4 (9.76%) Moq
5 4 (9.76%) NUnit
5 4 (9.76%) Team Foundation Server
6 3 (7.32%) WebDriver
7 2 (4.88%) Maven
7 2 (4.88%) Selenium
7 2 (4.88%) SoapUI
7 2 (4.88%) SonarQube
7 2 (4.88%) TestNG
8 1 (2.44%) Babel
8 1 (2.44%) gulp
8 1 (2.44%) webpack
General
1 11 (26.83%) Banking
1 11 (26.83%) Finance
2 3 (7.32%) Retail
3 2 (4.88%) Retail Banking
4 1 (2.44%) Games
4 1 (2.44%) Multimedia
Job Titles
1 32 (78.05%) Developer
2 13 (31.71%) Java Developer
3 11 (26.83%) C# Developer
4 9 (21.95%) .NET Developer
4 9 (21.95%) C# .NET Developer
5 8 (19.51%) Agile Developer
5 8 (19.51%) Full Stack Developer
6 7 (17.07%) Node.js Developer
7 5 (12.20%) Digital Developer
7 5 (12.20%) E-Commerce Developer
7 5 (12.20%) XML Developer
7 5 (12.20%) XML XSLT Developer
8 4 (9.76%) Agile .NET Developer
8 4 (9.76%) Agile C# Developer
8 4 (9.76%) Agile Java Developer
8 4 (9.76%) E-Commerce Engineer
8 4 (9.76%) Platform Engineer
9 3 (7.32%) Senior Developer
10 2 (4.88%) Test Automation Engineer
10 2 (4.88%) Test Engineer
Libraries, Frameworks & Software Standards
1 21 (51.22%) .NET
2 15 (36.59%) XML
3 14 (34.15%) CSS
3 14 (34.15%) HTML
4 13 (31.71%) JSON
4 13 (31.71%) Spring
5 12 (29.27%) Hibernate
5 12 (29.27%) JPA
5 12 (29.27%) Node.js
5 12 (29.27%) XSLT
6 11 (26.83%) SOAP
7 9 (21.95%) J2EE
7 9 (21.95%) KnockoutJS
8 8 (19.51%) Ajax
8 8 (19.51%) CSS3
8 8 (19.51%) HTML5
8 8 (19.51%) jQuery
8 8 (19.51%) REST
9 6 (14.63%) .NET Framework
9 6 (14.63%) Web Services
Miscellaneous
1 3 (7.32%) Analytical Skills
2 1 (2.44%) Computer Science
2 1 (2.44%) DataPower
2 1 (2.44%) Mobile App
Operating Systems
1 9 (21.95%) Windows
2 4 (9.76%) CoreOS
2 4 (9.76%) Linux
2 4 (9.76%) Ubuntu
3 3 (7.32%) Apple iOS
4 2 (4.88%) Android
Processes & Methodologies
1 26 (63.41%) Agile Software Development
2 19 (46.34%) E-Commerce
3 13 (31.71%) Continuous Integration
4 12 (29.27%) OO
5 10 (24.39%) Test Automation
6 9 (21.95%) Pair Programming
6 9 (21.95%) Scrum
6 9 (21.95%) Unit Testing
7 8 (19.51%) Data Modelling
8 7 (17.07%) RAD
9 6 (14.63%) BDD
10 5 (12.20%) SOA
10 5 (12.20%) Software Engineering
11 4 (9.76%) Continuous Delivery
11 4 (9.76%) Kanban
12 3 (7.32%) Domain-Driven Design
12 3 (7.32%) MVC
13 2 (4.88%) API Testing
13 2 (4.88%) Coaching
13 2 (4.88%) Data Protection
Programming Languages
1 17 (41.46%) C#
2 15 (36.59%) Java
3 13 (31.71%) JavaScript
3 13 (31.71%) SQL
4 5 (12.20%) Python
5 1 (2.44%) Apple Swift
5 1 (2.44%) Objective-C
5 1 (2.44%) Perl
5 1 (2.44%) PL/SQL
5 1 (2.44%) T-SQL
Qualifications
1 2 (4.88%) ISEB
1 2 (4.88%) ISTQB
2 1 (2.44%) Computer Science Degree
2 1 (2.44%) Degree
System Software
1 8 (19.51%) Docker
Systems Management
1 4 (9.76%) Opscode Chef
Vendors
1 9 (21.95%) Perforce
2 8 (19.51%) Oracle
3 1 (2.44%) IBM
3 1 (2.44%) Kony
3 1 (2.44%) Microsoft
3 1 (2.44%) Sybase
3 1 (2.44%) WSO2