Master the Object-Oriented Mindset in Ruby and Rails Course

Get Course

What this about?

Master the Object-Oriented Mindset in Ruby and Rails (MOOM) is a compilation of everything I've learned about writing flexible and comprehensible OO code over my two decades as a software developer, distilled and applied to practical Ruby and Rails examples. Rather than teaching a comprehensive “system” for OO design, MOOM focuses on inspiration: giving you the tools you need to identify the “missing objects” to decompose your applications into small, cohesive parts.
Get Course


Avdi Grimm

I’ve been a professional developer for over twenty years. Over the course of my career I’ve worked on everything from aerospace embedded systems to enterprise web applications. I’m a consulting pair-programmer, the author of several popular Ruby programming books, and a recipient of the Ruby Hero award for service to the Ruby community. Since I’ve been been helping developers deepen their coding practice at Graceful.Dev (formerly

I specialize in taking what I learn, synthesizing it, and sharing it in forms that are helpful to the team, the organization, and to the global community of developers. I’m particularly interested in building graceful systems: rich symmathesies of both people and software that have the capacity to accommodate and adapt to surprises.  My work encompasses talks, books, courses, screencasts, articles, newsletters, podcasts, pair-programming-as-a-service, consulting, and more.