Send a text Joe Leo shares his journey as a Ruby developer and how the Ruby community's welcoming and collaborative spirit drew him back after working with other languages. He introduces Phoenix, Def Method's innovative "closed loop" AI platform that autonomously tests and supports Rails applications. • Joe founded Def Method, naming the company with help from his wife in 2014 • Despite using Ruby early in his career, Joe had never attended RailsConf before • Joe began with C++, Java, ...