rails g scaffold developer name
rails g scaffold project name
rails g migration CreateJoinTableDeveloperProject developer project
rake db:migrate; has_and_belongs_to_many
Remove jbuilder files; Add rabl equivalents
Eager load associated models (N + 1 queries problem)
Add developers <-> projects models with habtm relation using supermodel

See http://imgur.com/a/fVxA0 for known potential issue