top of page
Open Site Navigation

Joe brings his mix of engineering muscle, business acumen, enthusiasm for challenges, and technical leadership to the helm of Def Method. Before founding DM, Joe spent over a decade as a developer delivering high-quality software solutions spanning government, education, finance and e-commerce.

As the CEO and Founder of Def Method he emulates the brand values of transparency in business operations, trust among the team and partners, and excellence in code.

Joe is co-author of The Well-Grounded Rubyist, Third Edition. Outside of the office, he has helped to build the NYC developer community as lead organizer of GORUCO, a member of the Technical Advisory Board of the New York Founding, and an instructor at General Assembly.


Connect with Joe

New York, NY

New York, NY

BS, Engineering, Penn State and MA Arts, NYU

Joe Leo


bottom of page