The following table provides summary statistics for contract job vacancies advertised in Salford 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 27 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)
Manchester / Salford
3 months to
27 Jun 2017
Same period 2016 Same period 2015
Rank 4 7 4
Rank change year-on-year +3 -3  
Contract jobs citing TDD 5 7 4
As % of all contract IT jobs advertised in Salford 19.23% 21.21% 19.05%
As % of the Processes & Methodologies category 22.73% 22.58% 23.53%
Number of daily rates quoted 4 4 4
Median daily rate £419 £373 £393
Median daily rate % change year-on-year +12.41% -5.09%  
90% offered a daily rate of more than £404 £354 £378
10% offered a daily rate of more than £425 £393 £421
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +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 Salford with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Salford
Contract job vacancies with a requirement for process and methodology skills 22 31 17
As % of all contract IT job vacancies advertised in Salford 84.62% 93.94% 80.95%
Number of daily rates quoted 16 19 14
Median daily rate £413 £370 £385
Median daily rate % change year-on-year +11.48% -3.89%  
90% offered a daily rate of more than £375 £173 £350
10% offered a daily rate of more than £450 £463 £430
UK excluding London median daily rate £415 £400 £385
% change year-on-year +3.75% +3.89%  
Number of hourly rates quoted 1 0 2
Median hourly rate £12.33 - £18.31
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in Salford

The job posting trend of jobs advertised in Salford 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 Salford

TDD
Contractor Daily Rate Trend in Salford

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

Contractor daily rate trend for TDD in Salford

For the 6 months to 27 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 Salford region with a requirement for TDD.

1 15 (93.75%) JavaScript
2 12 (75.00%) HTML
2 12 (75.00%) Agile Software Development
3 11 (68.75%) HTML5
4 10 (62.50%) Node.js
5 8 (50.00%) Software Engineering
6 7 (43.75%) BDD
6 7 (43.75%) Android
6 7 (43.75%) React
7 6 (37.50%) Mobile App
7 6 (37.50%) Apple iOS
7 6 (37.50%) Games
8 5 (31.25%) Scrum
8 5 (31.25%) Linux
8 5 (31.25%) GStreamer
8 5 (31.25%) Amazon AWS
8 5 (31.25%) Git (software)
8 5 (31.25%) Apache Cordova
9 4 (25.00%) DevOps
9 4 (25.00%) Jenkins
9 4 (25.00%) Kanban
10 3 (18.75%) Test Automation
10 3 (18.75%) Degree
10 3 (18.75%) JSON
10 3 (18.75%) Computer Science
10 3 (18.75%) Use Case
10 3 (18.75%) Mocha
10 3 (18.75%) CSS
10 3 (18.75%) Finance
10 3 (18.75%) Supplier Management

TDD
Co-occurring IT Skills in Salford 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:

Cloud Services
1 5 (31.25%) Amazon AWS
2 3 (18.75%) GitHub
3 1 (6.25%) Cloud Computing
Communications & Networking
1 1 (6.25%) DNS
1 1 (6.25%) HTTP
Database & Business Intelligence
1 1 (6.25%) Amazon DynamoDB
1 1 (6.25%) Big Data
1 1 (6.25%) Hadoop
1 1 (6.25%) Pentaho
Development Applications
1 5 (31.25%) Git (software)
2 4 (25.00%) Jenkins
3 3 (18.75%) Jasmine
3 3 (18.75%) Mocha
4 2 (12.50%) Cucumber
4 2 (12.50%) gulp
4 2 (12.50%) Hudson
4 2 (12.50%) webpack
5 1 (6.25%) Babel
5 1 (6.25%) Grunt
5 1 (6.25%) Maven
5 1 (6.25%) PhantomJS
5 1 (6.25%) Yeoman
General
1 6 (37.50%) Games
2 3 (18.75%) Finance
3 1 (6.25%) Digital Economy
3 1 (6.25%) Marketing
Job Titles
1 10 (62.50%) Developer
2 7 (43.75%) JavaScript Developer
3 5 (31.25%) Node.js Developer
3 5 (31.25%) Software Developer
4 2 (12.50%) Applications Consultant
4 2 (12.50%) Consultant
4 2 (12.50%) Linux Developer
4 2 (12.50%) Mobile Developer
4 2 (12.50%) Software Engineer
4 2 (12.50%) Technical Leader
5 1 (6.25%) Agile Developer
5 1 (6.25%) Applications Engineer
5 1 (6.25%) Mobile Software Engineer
5 1 (6.25%) Senior Developer
Libraries, Frameworks & Software Standards
1 12 (75.00%) HTML
2 11 (68.75%) HTML5
3 10 (62.50%) Node.js
4 7 (43.75%) React
5 5 (31.25%) Apache Cordova
5 5 (31.25%) GStreamer
6 3 (18.75%) AngularJS
6 3 (18.75%) CSS
6 3 (18.75%) FFmpeg
6 3 (18.75%) JSON
6 3 (18.75%) REST
6 3 (18.75%) Sass
7 2 (12.50%) HTML5 Canvas
7 2 (12.50%) Pixi.js
7 2 (12.50%) RESTful
7 2 (12.50%) WebGL
7 2 (12.50%) XML
8 1 (6.25%) Ajax
8 1 (6.25%) CSS3
8 1 (6.25%) Laravel
Miscellaneous
1 6 (37.50%) Mobile App
2 3 (18.75%) Computer Science
3 2 (12.50%) IPTV
3 2 (12.50%) Streaming Video
4 1 (6.25%) User Experience
Operating Systems
1 7 (43.75%) Android
2 6 (37.50%) Apple iOS
3 5 (31.25%) Linux
Processes & Methodologies
1 12 (75.00%) Agile Software Development
2 8 (50.00%) Software Engineering
3 7 (43.75%) BDD
4 5 (31.25%) Scrum
5 4 (25.00%) DevOps
5 4 (25.00%) Kanban
6 3 (18.75%) Continuous Delivery
6 3 (18.75%) Supplier Management
6 3 (18.75%) Test Automation
6 3 (18.75%) Use Case
7 2 (12.50%) Android Development
7 2 (12.50%) Continuous Integration
7 2 (12.50%) Pair Programming
7 2 (12.50%) Performance Testing
7 2 (12.50%) Software Testing
7 2 (12.50%) Unit Testing
7 2 (12.50%) Web Development
8 1 (6.25%) iOS Development
8 1 (6.25%) Mentoring
8 1 (6.25%) Microservices
Programming Languages
1 15 (93.75%) JavaScript
2 3 (18.75%) ES6
3 2 (12.50%) Java
4 1 (6.25%) Apple Swift
4 1 (6.25%) Bash Shell
4 1 (6.25%) Clojure
4 1 (6.25%) Groovy
4 1 (6.25%) Objective-C
4 1 (6.25%) PHP
4 1 (6.25%) Python
4 1 (6.25%) Ruby
4 1 (6.25%) Scala
Qualifications
1 3 (18.75%) Computer Science Degree
1 3 (18.75%) Degree
Quality Assurance & Compliance
1 1 (6.25%) QA
Vendors
1 1 (6.25%) Cloudera