The following table provides summary statistics for contract job vacancies advertised in Northern Ireland 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 March 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.

3 months to
26 Mar 2017
Same period 2016 Same period 2015
Test-Driven Development (TDD)
UK / Northern Ireland
Rank 31 21 16
Rank change year-on-year -10 -5  
Contract jobs citing TDD 11 1 7
As % of all contract IT jobs advertised in Northern Ireland 4.85% 0.83% 5.98%
As % of the Processes & Methodologies category 5.67% 1.02% 7.53%
Number of daily rates quoted 6 0 4
Median daily rate £400 - £375
UK excluding London median daily rate £402 £400 £375
% change year-on-year +0.56% +6.66%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £39.00 £45.75 £36.00
% change year-on-year -14.75% +27.08%  

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 Northern Ireland with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Northern Ireland
Contract job vacancies with a requirement for process and methodology skills 194 98 93
As % of all contract IT job vacancies advertised in Northern Ireland 85.46% 81.67% 79.49%
Number of daily rates quoted 158 45 50
Median daily rate £403 £300 £250
Median daily rate % change year-on-year +34.16% +20.00%  
90% offered a daily rate of more than £280 £109 £143
10% offered a daily rate of more than £500 £450 £375
UK excluding London median daily rate £410 £400 £398
% change year-on-year +2.50% +0.62%  
Number of hourly rates quoted 3 3 3
Median hourly rate £16.81 £14.50 £71.25
Median hourly rate % change year-on-year +15.89% -79.64%  
90% offered a hourly rate of more than £10.00 £13.50 £15.00
10% offered a hourly rate of more than £21.61 £40.00 £125.00
UK excluding London median hourly rate £36.00 £38.75 £30.00
% change year-on-year -7.09% +29.16%  

TDD
Job Vacancy Trend in Northern Ireland

The job posting trend of jobs advertised in Northern Ireland 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 Northern Ireland

TDD
Contractor Daily Rate Trend in Northern Ireland

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

Contractor daily rate trend for TDD in Northern Ireland

TDD
Contractor Daily Rate Histogram in Northern Ireland

The daily rate distribution of IT jobs citing TDD in Northern Ireland over the 3 months to 26 March 2017.

Contractor daily rate histogram for TDD in Northern Ireland

TDD
Contract Job Locations in Northern Ireland

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Northern Ireland region over the 3 months to 26 March 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
County Antrim - 10 £400 - 1
TDD
UK

TDD
Top 30 Related IT Skills in Northern Ireland

For the 6 months to 26 March 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 Northern Ireland region with a requirement for TDD.

1 32 (100.00%) Agile Software Development
2 25 (78.13%) Java
3 21 (65.63%) SQL
3 21 (65.63%) BDD
4 20 (62.50%) OOD
5 16 (50.00%) Continuous Integration
6 15 (46.88%) C#
7 14 (43.75%) C++
7 14 (43.75%) Python
7 14 (43.75%) Multithreading
8 13 (40.63%) NoSQL
8 13 (40.63%) Degree
8 13 (40.63%) Front Office
9 11 (34.38%) Information Security
9 11 (34.38%) Linux
9 11 (34.38%) Integration Testing
10 10 (31.25%) Mathematics
10 10 (31.25%) Equity Derivative
10 10 (31.25%) Finance
11 9 (28.13%) Banking
12 8 (25.00%) Data Validation
12 8 (25.00%) Validation
13 7 (21.88%) AngularJS
14 6 (18.75%) Relational Database
14 6 (18.75%) RDBMS
15 5 (15.63%) N-Tier
15 5 (15.63%) Apache
15 5 (15.63%) Unix
15 5 (15.63%) Solaris
15 5 (15.63%) Perl

TDD
Top Related IT Skills in Northern Ireland 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 5 (15.63%) Apache
1 5 (15.63%) Cloud Foundry
2 2 (6.25%) Confluence
Cloud Services
1 5 (15.63%) Amazon AWS
Database & Business Intelligence
1 13 (40.63%) NoSQL
2 6 (18.75%) RDBMS
2 6 (18.75%) Relational Database
3 5 (15.63%) KDB
3 5 (15.63%) Kdb+
4 1 (3.13%) SQL Server
Development Applications
1 2 (6.25%) Bitbucket
1 2 (6.25%) Git (software)
1 2 (6.25%) JIRA
1 2 (6.25%) TeamCity
General
1 13 (40.63%) Front Office
2 10 (31.25%) Finance
3 9 (28.13%) Banking
Job Titles
1 30 (93.75%) Developer
2 24 (75.00%) Java Developer
3 13 (40.63%) Senior Developer
3 13 (40.63%) Senior Java Developer
4 11 (34.38%) Lead Developer
5 5 (15.63%) KDB Developer
6 2 (6.25%) Lead Java Developer
6 2 (6.25%) SQL Developer
7 1 (3.13%) .NET Developer
7 1 (3.13%) JavaScript Developer
7 1 (3.13%) Scrum Master
7 1 (3.13%) Senior JavaScript Developer
7 1 (3.13%) Senior SQL Developer
7 1 (3.13%) Technical Developer
7 1 (3.13%) Technical Leader
Libraries, Frameworks & Software Standards
1 7 (21.88%) AngularJS
2 4 (12.50%) Angular 2
2 4 (12.50%) jQuery
2 4 (12.50%) Spring
2 4 (12.50%) Spring Boot
3 3 (9.38%) Node.js
4 1 (3.13%) .NET
4 1 (3.13%) ASP.NET
4 1 (3.13%) ASP.NET MVC
4 1 (3.13%) ASP.NET Web API
4 1 (3.13%) SOAP
4 1 (3.13%) WCF
Miscellaneous
1 10 (31.25%) Equity Derivative
2 5 (15.63%) Analytical Skills
2 5 (15.63%) N-Tier
3 4 (12.50%) Equities
4 3 (9.38%) Derivative
5 1 (3.13%) User Experience
Operating Systems
1 11 (34.38%) Linux
2 5 (15.63%) Solaris
2 5 (15.63%) Unix
Processes & Methodologies
1 32 (100.00%) Agile Software Development
2 21 (65.63%) BDD
3 20 (62.50%) OOD
4 16 (50.00%) Continuous Integration
5 14 (43.75%) Multithreading
6 11 (34.38%) Information Security
6 11 (34.38%) Integration Testing
7 10 (31.25%) Mathematics
8 8 (25.00%) Data Validation
8 8 (25.00%) Validation
9 5 (15.63%) Defect Management
10 4 (12.50%) Mentoring
10 4 (12.50%) Migration
10 4 (12.50%) Pair Programming
11 1 (3.13%) DSDM
11 1 (3.13%) Kanban
11 1 (3.13%) MVC
11 1 (3.13%) Programme Management
11 1 (3.13%) Scrum
Programming Languages
1 25 (78.13%) Java
2 21 (65.63%) SQL
3 15 (46.88%) C#
4 14 (43.75%) C++
4 14 (43.75%) Python
5 5 (15.63%) Perl
6 2 (6.25%) JavaScript
Qualifications
1 13 (40.63%) Degree
System Software
1 1 (3.13%) Docker