This is the slide deck which I presented at Tokyo Rubyist Meetup @trbmeetup
esa ( https://esa.io ) is a SaaS product in which you can share documents with your teammates in a wiki-like format, and is made with Rails.
We started esa as a hobby coding project four years ago. Now it has over 2,700 organizations and is profitable.
I'll introduce our way of turning a product from a hobby into a business, and how to increase collaboration between engineers.