The following table provides summary statistics for contract job vacancies advertised in Glasgow 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)
Scotland > Glasgow
3 months to
29 Jun 2017
Same period 2016 Same period 2015
Rank 19 47 45
Rank change year-on-year +28 -2  
Contract jobs citing TDD 49 22 28
As % of all contract IT jobs advertised in Glasgow 7.36% 3.09% 3.12%
As % of the Processes & Methodologies category 8.83% 3.81% 3.75%
Number of daily rates quoted 37 16 14
Glasgow median daily rate £388 £375 £350
Median daily rate % change year-on-year +3.33% +7.14%  
10th Percentile £350 £263 £260
90th Percentile £458 £438 £401
Scotland median daily rate £425 £375 £375
% change year-on-year +13.33% -  
Number of hourly rates quoted 0 0 0
Glasgow median hourly rate - - -
Scotland median hourly rate £35.00 - £34.80

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 Glasgow with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Glasgow
Contract job vacancies with a requirement for process and methodology skills 555 578 747
As % of all contract IT job vacancies advertised in Glasgow 83.33% 81.18% 83.18%
Number of daily rates quoted 965 1189 1185
Glasgow median daily rate £388 £363 £350
Median daily rate % change year-on-year +6.89% +3.57%  
10th Percentile £281 £233 £250
90th Percentile £488 £488 £450
Scotland median daily rate £400 £375 £360
% change year-on-year +6.66% +4.16%  
Number of hourly rates quoted 21 3 98
Glasgow median hourly rate £25.00 £43.00 £36.00
Median hourly rate % change year-on-year -41.86% +19.44%  
10th Percentile £13.75 £43.00 £12.38
90th Percentile £41.25 £43.00 £46.80
Scotland median hourly rate £37.50 £37.50 £30.50
% change year-on-year - +22.95%  

TDD
Job Vacancy Trend in Glasgow

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

Job vacancy trend for TDD in Glasgow

TDD
Contractor Daily Rate Trend in Glasgow

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

Contractor daily rate trend for TDD in Glasgow

TDD
Contractor Daily Rate Histogram in Glasgow

The daily rate distribution of IT jobs citing TDD in Glasgow over the 3 months to 29 June 2017.

Contractor daily rate histogram for TDD in Glasgow

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 Glasgow region with a requirement for TDD.

1 54 (77.14%) Agile Software Development
2 44 (62.86%) Java
3 20 (28.57%) Scrum
4 19 (27.14%) Spring
4 19 (27.14%) JavaScript
5 18 (25.71%) BDD
6 17 (24.29%) Hibernate
7 15 (21.43%) SQL
7 15 (21.43%) Web Services
7 15 (21.43%) AngularJS
8 14 (20.00%) C#
9 13 (18.57%) HTML
9 13 (18.57%) CSS
10 12 (17.14%) Finance
10 12 (17.14%) Kanban
10 12 (17.14%) NoSQL
10 12 (17.14%) SDLC
11 11 (15.71%) CSS3
11 11 (15.71%) HTML5
11 11 (15.71%) Jenkins
11 11 (15.71%) Maven
11 11 (15.71%) OO
11 11 (15.71%) .NET
12 10 (14.29%) J2EE
13 9 (12.86%) Ruby
13 9 (12.86%) Continuous Integration
13 9 (12.86%) Amazon EC2
13 9 (12.86%) Amazon S3
13 9 (12.86%) Test Automation
13 9 (12.86%) Amazon AWS

TDD
Co-occurring IT Skills in Glasgow 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 1 (1.43%) Apache
1 1 (1.43%) Apache Solr
1 1 (1.43%) CMS
1 1 (1.43%) Elasticsearch
1 1 (1.43%) Mule
1 1 (1.43%) Sitecore CMS
1 1 (1.43%) Tomcat
Applications
1 6 (8.57%) Photoshop
2 4 (5.71%) Adobe Creative Suite
3 1 (1.43%) Adobe Illustrator
Business Applications
1 3 (4.29%) SAP Oil and Gas
Cloud Services
1 9 (12.86%) Amazon AWS
1 9 (12.86%) Amazon EC2
1 9 (12.86%) Amazon S3
1 9 (12.86%) Amazon SQS
2 6 (8.57%) GitHub
3 4 (5.71%) Microsoft Azure
Communications & Networking
1 1 (1.43%) DNS
1 1 (1.43%) HTTP
Database & Business Intelligence
1 12 (17.14%) NoSQL
2 7 (10.00%) DB2
2 7 (10.00%) Relational Database
3 6 (8.57%) Apache Cassandra
4 5 (7.14%) KDB
4 5 (7.14%) Kdb+
4 5 (7.14%) SQL Server
5 4 (5.71%) Oracle Database
5 4 (5.71%) Oracle Database 11g
5 4 (5.71%) Oracle Database 12c
5 4 (5.71%) RDBMS
5 4 (5.71%) SQL Server 2014
6 2 (2.86%) Oracle Database 10g
7 1 (1.43%) Big Data
7 1 (1.43%) MongoDB
7 1 (1.43%) SQL Server 2012
7 1 (1.43%) SQL Server 2016
Development Applications
1 11 (15.71%) Jenkins
1 11 (15.71%) Maven
2 7 (10.00%) Git (software)
3 6 (8.57%) Grunt
3 6 (8.57%) gulp
4 5 (7.14%) Selenium
5 4 (5.71%) Cucumber
5 4 (5.71%) JUnit
5 4 (5.71%) Subversion
6 3 (4.29%) Hudson
6 3 (4.29%) JIRA
6 3 (4.29%) Mercurial
6 3 (4.29%) Team Foundation Server
7 2 (2.86%) Ant
7 2 (2.86%) Concordion
7 2 (2.86%) Gradle
7 2 (2.86%) JBehave
7 2 (2.86%) Mockito
7 2 (2.86%) Visual Studio
8 1 (1.43%) Moq
General
1 12 (17.14%) Finance
2 4 (5.71%) Banking
2 4 (5.71%) Legal
2 4 (5.71%) Telecoms
3 3 (4.29%) Electronics
3 3 (4.29%) Manufacturing
3 3 (4.29%) Marketing
4 1 (1.43%) Private Banking
4 1 (1.43%) Retail
Job Titles
1 56 (80.00%) Developer
2 37 (52.86%) Java Developer
3 11 (15.71%) AWS Developer
4 8 (11.43%) C# Developer
5 6 (8.57%) Cassandra Developer
6 5 (7.14%) .NET Developer
6 5 (7.14%) Analyst
6 5 (7.14%) C# .NET Developer
7 4 (5.71%) ASP.NET Developer
7 4 (5.71%) ASP.NET MVC Developer
7 4 (5.71%) Business Analyst
7 4 (5.71%) C# ASP.NET Developer
7 4 (5.71%) Coordinator
7 4 (5.71%) MiFID Business Analyst
7 4 (5.71%) QA Coordinator
7 4 (5.71%) Senior Developer
8 3 (4.29%) C# WPF Developer
8 3 (4.29%) Front End Developer (Client-Side Developer)
8 3 (4.29%) UI Developer
8 3 (4.29%) WPF Developer
Libraries, Frameworks & Software Standards
1 19 (27.14%) Spring
2 17 (24.29%) Hibernate
3 15 (21.43%) AngularJS
3 15 (21.43%) Web Services
4 13 (18.57%) CSS
4 13 (18.57%) HTML
5 11 (15.71%) .NET
5 11 (15.71%) CSS3
5 11 (15.71%) HTML5
6 10 (14.29%) J2EE
7 8 (11.43%) jQuery
8 7 (10.00%) Sass
9 6 (8.57%) ASP.NET
9 6 (8.57%) ASP.NET MVC
9 6 (8.57%) ASP.NET Web API
9 6 (8.57%) Node.js
9 6 (8.57%) React
10 5 (7.14%) JMS
10 5 (7.14%) Kafka
10 5 (7.14%) RESTful
Miscellaneous
1 2 (2.86%) User Experience
2 1 (1.43%) Enterprise Software
2 1 (1.43%) Greenfield Project
2 1 (1.43%) Mobile App
2 1 (1.43%) Virtual Team
Operating Systems
1 7 (10.00%) Unix
2 1 (1.43%) Android
2 1 (1.43%) Apple iOS
Processes & Methodologies
1 54 (77.14%) Agile Software Development
2 20 (28.57%) Scrum
3 18 (25.71%) BDD
4 12 (17.14%) Kanban
4 12 (17.14%) SDLC
5 11 (15.71%) OO
6 9 (12.86%) Continuous Delivery
6 9 (12.86%) Continuous Integration
6 9 (12.86%) Test Automation
7 7 (10.00%) Front End Development
7 7 (10.00%) MVC
8 6 (8.57%) Stakeholder Management
9 5 (7.14%) OOD
9 5 (7.14%) Release Management
9 5 (7.14%) User Acceptance Testing
10 4 (5.71%) Business Analysis
10 4 (5.71%) Change Management
10 4 (5.71%) Data Analysis
10 4 (5.71%) Data Modelling
10 4 (5.71%) Project Management
Programming Languages
1 44 (62.86%) Java
2 19 (27.14%) JavaScript
3 15 (21.43%) SQL
4 14 (20.00%) C#
5 9 (12.86%) Ruby
6 5 (7.14%) PowerShell
7 4 (5.71%) Python
7 4 (5.71%) XAML
8 3 (4.29%) ECMAScript
8 3 (4.29%) PHP
8 3 (4.29%) Scala
9 2 (2.86%) PL/SQL
9 2 (2.86%) Shell Script
10 1 (1.43%) Objective-C
Qualifications
1 1 (1.43%) Degree
Quality Assurance & Compliance
1 5 (7.14%) QA
2 4 (5.71%) MiFID
3 1 (1.43%) Data Quality
System Software
1 2 (2.86%) Docker
Systems Management
1 2 (2.86%) HP Quality Center
Vendors
1 6 (8.57%) Oracle
2 4 (5.71%) Adobe
3 3 (4.29%) SAP
3 3 (4.29%) Sybase
4 2 (2.86%) HP
4 2 (2.86%) Perforce
4 2 (2.86%) Twitter
5 1 (1.43%) Microsoft
5 1 (1.43%) Netezza
5 1 (1.43%) Sitecore
5 1 (1.43%) Talend
5 1 (1.43%) Xamarin
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