Obie Fernandez is a Ruby

Ruby (programming language)

Ruby is a dynamic, reflective, general-purpose object-oriented programming language that combines syntax inspired by Perl with Smalltalk-like features. Ruby originated in Japan during the mid-1990s and was first developed and designed by Yukihiro "Matz" Matsumoto...

 and Ruby on Rails

Ruby on Rails

Ruby on Rails, often shortened to Rails or RoR, is an open source web application framework for the Ruby programming language.-History:...

 developer. He has authored The Rails Way and has become the editor of Addison-Wesley's Professional Ruby series.
His vocal advocacy of Ruby over Java

Java (programming language)

Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities...

has garnered wide criticism. He founded and heads Hashrocket, a company offering Ruby development services. He also organizes a business conference BizConf, which is hosted by Hashrocket.