The table below looks at the statistics for TDD skills in IT contracts advertised for the Hertfordshire region. Included is a guide to the average contractor rates offered in IT contracts that have cited TDD over the 3 months to 30 July 2015 with a comparison to the same period in the previous 2 years.

Note that daily contractor rates and hourly contractor rates are treated separately. When calculating average contractor rates, daily rates are not derived from quoted hourly rates or vice versa.

Location
3 months to
30 Jul 2015
Same period 2014 Same period 2013
Test-Driven Development (TDD)
Rank 48 48 37
Rank change year-on-year
0 -11
Contract jobs citing TDD 23 12 24
As % of all contract IT jobs located in Hertfordshire 2.71% 1.80% 3.93%
As % of the Processes & Methodologies category 3.73% 2.40% 5.06%
Number of daily rates quoted 11 10 23
Average daily rate
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of your Daily Rate
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£500 £406 £400
Average daily rate % change year-on-year
+23.07% +1.56%
UK excluding London average daily rate £375 £375 £360
% change year-on-year
- +4.16%
Number of hourly rates quoted 0 0 0
Average hourly rate - - -
UK excluding London average hourly rate £40.00 £59.50 £31.75
% change year-on-year
-32.77% +87.40%
TDD
East of England

The following table is for comparison with the above and provides statistics for the entire Processes & Methodologies category in contract jobs advertised in the Hertfordshire region.

Processes & Methodologies Category
Hertfordshire
Contract IT job ads with a match in the
Processes & Methodologies category
616 499 474
As % of all contract IT jobs located in Hertfordshire 72.56% 74.70% 77.58%
Number of daily rates quoted 317 253 240
Average daily rate £375 £380 £400
Average daily rate % change year-on-year
-1.31% -5.00%
90% offered a daily rate of more than £275 £250 £250
10% offered a daily rate of more than £550 £475 £500
UK excluding London average daily rate £388 £375 £375
% change year-on-year
+3.33% -
Number of hourly rates quoted 54 32 21
Average hourly rate £33.00 £21.00 £32.50
Average hourly rate % change year-on-year
+57.14% -35.38%
90% offered a hourly rate of more than £9.00 £10.75 £12.24
10% offered a hourly rate of more than £50.00 £40.00 £50.00
UK excluding London average hourly rate £30.00 £26.50 £31.00
% change year-on-year
+13.20% -14.51%

TDD
Jobs Demand Trend in Hertfordshire

This chart provides a 3-month moving total of IT contractor jobs citing TDD across the Hertfordshire region as a proportion of the total demand within the Processes & Methodologies category.

TDD Jobs Demand Trend in Hertfordshire

TDD
Daily Rate Trend in Hertfordshire

This chart provides the 3-month moving average for daily rates quoted in IT contract jobs citing TDD across the Hertfordshire region.

TDD Daily Rate Trend in Hertfordshire

TDD
Daily Rate Histogram in Hertfordshire

This chart provides a histogram of daily rates quoted in contract IT jobs citing TDD across the Hertfordshire region over the 3 months to 30 July 2015.

TDD Daily Rate Histogram in Hertfordshire

TDD
Hourly Rate Trend in Hertfordshire

This chart provides the 3-month moving average for hourly rates quoted in IT contractor jobs citing TDD across the Hertfordshire region.

TDD Hourly Rate Trend in Hertfordshire

TDD
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the average contractor rates quoted in IT jobs citing TDD within the Hertfordshire region over the 3 months to 30 July 2015. 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
(Use links below to see detailed
statistics and historical trends)
Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Average
Daily Rate
Last 3 Months
Average Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Hemel Hempstead - 8 £500 - 1
Watford - 7 - - 2
Welwyn Garden City -11 1 £550 -
St Albans - 1 £450 - 5
TDD
East of England

TDD
Top 30 Related IT Skills in Hertfordshire

For the 6 months to 30 July 2015, IT contractor jobs across the Hertfordshire region citing TDD also mentioned the following IT skills in order of popularity. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited TDD.

1 30 (90.91%) Agile Software Development
2 26 (78.79%) JavaScript
3 22 (66.67%) SQL
4 19 (57.58%) HTML
5 15 (45.45%) Continuous Integration
6 14 (42.42%) PHP
7 13 (39.39%) XML
7 13 (39.39%) Selenium
7 13 (39.39%) RESTful
8 12 (36.36%) WebDriver
8 12 (36.36%) Test Scripting
8 12 (36.36%) Test Automation
8 12 (36.36%) Analytical Skills
8 12 (36.36%) Retail
8 12 (36.36%) Subversion
8 12 (36.36%) UNIX
8 12 (36.36%) Java
9 11 (33.33%) MySQL
9 11 (33.33%) DB2
9 11 (33.33%) Flash
9 11 (33.33%) Document Management
9 11 (33.33%) Automated Testing
9 11 (33.33%) Coaching
9 11 (33.33%) DbVisualizer
9 11 (33.33%) QA
9 11 (33.33%) System Testing
10 10 (30.30%) jQuery
11 9 (27.27%) SOA
11 9 (27.27%) OOP
11 9 (27.27%) J2EE

TDD
Top Related IT Skills in Hertfordshire by Category

For the 6 months to 30 July 2015, IT contractor jobs across the Hertfordshire region citing TDD also mentioned the following IT skills grouped by category. The figures indicate the number of jobs and their proportion against the total number of contract IT job ads sampled that cited TDD. Up to 20 skills are shown per category.

Application Platforms
1 6 (18.18%) WebSphere
2 1 (3.03%) Alfresco
2 1 (3.03%) Mule
2 1 (3.03%) nginx
2 1 (3.03%) Apache
2 1 (3.03%) CMS
Business Applications
1 5 (15.15%) Magento
Communications & Networking
1 2 (6.06%) Internet
Database & Business Intelligence
1 11 (33.33%) DB2
1 11 (33.33%) MySQL
1 11 (33.33%) DbVisualizer
2 3 (9.09%) NoSQL
2 3 (9.09%) MongoDB
3 2 (6.06%) Oracle Database 10g
3 2 (6.06%) Oracle Database
4 1 (3.03%) Redis
4 1 (3.03%) PostgreSQL
4 1 (3.03%) CouchDB
4 1 (3.03%) Apache Cassandra
4 1 (3.03%) SQL Server
Development Applications
1 13 (39.39%) Selenium
2 12 (36.36%) WebDriver
2 12 (36.36%) Subversion
3 7 (21.21%) Cucumber
4 5 (15.15%) PHPUnit
5 3 (9.09%) Git (software)
6 2 (6.06%) Jenkins
6 2 (6.06%) FitNesse
6 2 (6.06%) JIRA
7 1 (3.03%) JUnit
7 1 (3.03%) Maven
General
1 12 (36.36%) Retail
2 1 (3.03%) Finance
Job Titles
1 20 (60.61%) Developer
2 11 (33.33%) Tester
2 11 (33.33%) Automation Tester
3 9 (27.27%) PHP Developer
4 7 (21.21%) Senior Developer
4 7 (21.21%) Selenium Tester
5 6 (18.18%) Senior PHP Developer
6 3 (9.09%) Front-End Developer
6 3 (9.09%) .NET Developer
7 2 (6.06%) Web Developer
7 2 (6.06%) Java Developer
7 2 (6.06%) JavaScript Developer
8 1 (3.03%) .NET Web Developer
8 1 (3.03%) Front-End Web Developer
8 1 (3.03%) Test Leader
8 1 (3.03%) Agile .NET Developer
8 1 (3.03%) Architect
8 1 (3.03%) Test Manager
8 1 (3.03%) Technical Architect
Libraries, Frameworks & Software Standards
1 19 (57.58%) HTML
2 13 (39.39%) XML
2 13 (39.39%) RESTful
3 11 (33.33%) Flash
4 10 (30.30%) jQuery
5 9 (27.27%) J2EE
6 8 (24.24%) Twitter Bootstrap
7 7 (21.21%) CSS
8 6 (18.18%) Gherkin
9 4 (12.12%) CSS3
9 4 (12.12%) Web Services
9 4 (12.12%) HTML5
10 3 (9.09%) .NET
11 2 (6.06%) Hibernate
11 2 (6.06%) Spring
11 2 (6.06%) Ajax
11 2 (6.06%) Java EE
12 1 (3.03%) JSON
12 1 (3.03%) Symfony
12 1 (3.03%) Django
Miscellaneous
1 12 (36.36%) Analytical Skills
2 1 (3.03%) Mobile App
Operating Systems
1 12 (36.36%) UNIX
2 1 (3.03%) Windows
2 1 (3.03%) Linux
Processes & Methodologies
1 30 (90.91%) Agile Software Development
2 15 (45.45%) Continuous Integration
3 12 (36.36%) Test Scripting
3 12 (36.36%) Test Automation
4 11 (33.33%) Coaching
4 11 (33.33%) System Testing
4 11 (33.33%) Document Management
4 11 (33.33%) Automated Testing
5 9 (27.27%) OOP
5 9 (27.27%) SOA
5 9 (27.27%) Open Source
6 7 (21.21%) BDD
7 5 (15.15%) MVC
8 4 (12.12%) Scrum
8 4 (12.12%) E-Commerce
9 3 (9.09%) OO
10 2 (6.06%) Enterprise Architecture
10 2 (6.06%) Continuous Improvement
10 2 (6.06%) Dependency Injection
10 2 (6.06%) SDLC
Programming Languages
1 26 (78.79%) JavaScript
2 22 (66.67%) SQL
3 14 (42.42%) PHP
4 12 (36.36%) Java
5 3 (9.09%) C#
6 2 (6.06%) PL/SQL
6 2 (6.06%) Erlang
7 1 (3.03%) PowerShell
7 1 (3.03%) Scala
7 1 (3.03%) Clojure
7 1 (3.03%) T-SQL
7 1 (3.03%) Ruby
Qualifications
1 6 (18.18%) Security Cleared
Quality Assurance & Compliance
1 11 (33.33%) QA
2 2 (6.06%) SLA
Systems Management
1 1 (3.03%) Puppet
1 1 (3.03%) Opscode Chef
Vendors
1 9 (27.27%) Zend
2 2 (6.06%) Oracle