Some of my work on a CMS with PDF and job board integration for a headhunter agency, see https://github.com/ChrisRuss/job_application/tree/master/jobboard. See http://jobapply-chris.herokuapp.com for a "small" demo.
For some more examples and some test driven dev examples, see https://github.com/ChrisRuss/job_application/tree/master/pre_register_project, coded for a project in beta mode with sign up for a waiting list.
Also, I included some RSpec examples I have been co-working on for a subproject of the "pre register project", see https://github.com/ChrisRuss/job_application/tree/master/rspec_examples/rspec