The following table provides summary statistics for contract job vacancies advertised in Belfast 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 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.

Test-Driven Development (TDD)
County Antrim / Belfast
3 months to
28 Mar 2017
Same period 2016 Same period 2015
Rank 30 - 16
Rank change year-on-year - 0  
Contract jobs citing TDD 9 0 7
As % of all contract IT jobs advertised in Belfast 4.37% - 7.07%
As % of the Processes & Methodologies category 5.08% - 8.75%
Number of daily rates quoted 4 0 4
Median daily rate £400 - £375
UK excluding London median daily rate £405 £400 £375
% change year-on-year +1.12% +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 Belfast with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Belfast
Contract job vacancies with a requirement for process and methodology skills 177 93 80
As % of all contract IT job vacancies advertised in Belfast 85.92% 83.04% 80.81%
Number of daily rates quoted 145 44 43
Median daily rate £400 £300 £215
Median daily rate % change year-on-year +33.33% +39.53%  
90% offered a daily rate of more than £280 £109 £143
10% offered a daily rate of more than £466 £450 £375
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 3 2 2
Median hourly rate £16.81 £14.50 £17.50
Median hourly rate % change year-on-year +15.89% -17.14%  
UK excluding London median hourly rate £36.00 £38.50 £30.20
% change year-on-year -6.49% +27.48%  

TDD
Job Vacancy Trend in Belfast

The job posting trend of jobs advertised in Belfast 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 Belfast

TDD
Contractor Daily Rate Trend in Belfast

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

Contractor daily rate trend for TDD in Belfast

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

1 28 (100.00%) Agile Software Development
2 22 (78.57%) Java
3 18 (64.29%) SQL
3 18 (64.29%) BDD
4 17 (60.71%) OOD
5 15 (53.57%) Continuous Integration
6 13 (46.43%) C#
7 12 (42.86%) C++
7 12 (42.86%) Python
7 12 (42.86%) Front Office
7 12 (42.86%) Multithreading
7 12 (42.86%) Degree
8 11 (39.29%) NoSQL
9 10 (35.71%) Information Security
9 10 (35.71%) Linux
9 10 (35.71%) Integration Testing
10 9 (32.14%) Mathematics
11 8 (28.57%) Validation
11 8 (28.57%) Equity Derivative
11 8 (28.57%) Data Validation
12 7 (25.00%) AngularJS
12 7 (25.00%) Finance
13 5 (17.86%) Perl
13 5 (17.86%) Banking
13 5 (17.86%) Apache
13 5 (17.86%) Unix
13 5 (17.86%) Solaris
13 5 (17.86%) N-Tier
13 5 (17.86%) RDBMS
13 5 (17.86%) Relational Database

TDD
Co-occurring IT Skills in Belfast 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 (17.86%) Apache
1 5 (17.86%) Cloud Foundry
2 2 (7.14%) Confluence
Cloud Services
1 5 (17.86%) Amazon AWS
Database & Business Intelligence
1 11 (39.29%) NoSQL
2 5 (17.86%) KDB
2 5 (17.86%) Kdb+
2 5 (17.86%) RDBMS
2 5 (17.86%) Relational Database
3 1 (3.57%) SQL Server
Development Applications
1 2 (7.14%) Bitbucket
1 2 (7.14%) Git (software)
1 2 (7.14%) JIRA
1 2 (7.14%) TeamCity
General
1 12 (42.86%) Front Office
2 7 (25.00%) Finance
3 5 (17.86%) Banking
Job Titles
1 27 (96.43%) Developer
2 21 (75.00%) Java Developer
3 11 (39.29%) Senior Developer
3 11 (39.29%) Senior Java Developer
4 9 (32.14%) Lead Developer
5 5 (17.86%) KDB Developer
6 1 (3.57%) .NET Developer
6 1 (3.57%) JavaScript Developer
6 1 (3.57%) Lead Java Developer
6 1 (3.57%) Senior JavaScript Developer
6 1 (3.57%) SQL Developer
Libraries, Frameworks & Software Standards
1 7 (25.00%) AngularJS
2 4 (14.29%) Angular 2
2 4 (14.29%) jQuery
2 4 (14.29%) Spring
2 4 (14.29%) Spring Boot
3 3 (10.71%) Node.js
4 1 (3.57%) .NET
4 1 (3.57%) ASP.NET
4 1 (3.57%) ASP.NET MVC
4 1 (3.57%) ASP.NET Web API
4 1 (3.57%) SOAP
4 1 (3.57%) WCF
Miscellaneous
1 8 (28.57%) Equity Derivative
2 5 (17.86%) Analytical Skills
2 5 (17.86%) N-Tier
3 3 (10.71%) Derivative
3 3 (10.71%) Equities
Operating Systems
1 10 (35.71%) Linux
2 5 (17.86%) Solaris
2 5 (17.86%) Unix
Processes & Methodologies
1 28 (100.00%) Agile Software Development
2 18 (64.29%) BDD
3 17 (60.71%) OOD
4 15 (53.57%) Continuous Integration
5 12 (42.86%) Multithreading
6 10 (35.71%) Information Security
6 10 (35.71%) Integration Testing
7 9 (32.14%) Mathematics
8 8 (28.57%) Data Validation
8 8 (28.57%) Validation
9 5 (17.86%) Defect Management
10 4 (14.29%) Mentoring
10 4 (14.29%) Migration
10 4 (14.29%) Pair Programming
11 1 (3.57%) MVC
Programming Languages
1 22 (78.57%) Java
2 18 (64.29%) SQL
3 13 (46.43%) C#
4 12 (42.86%) C++
4 12 (42.86%) Python
5 5 (17.86%) Perl
6 2 (7.14%) JavaScript
Qualifications
1 12 (42.86%) Degree
System Software
1 1 (3.57%) Docker