Nick Sieger is an engineer at Engine Yard, working on JRuby and leading the effort to make the Java Virtual Machine a robust yet easy-to-use deployment platform for Rails and Ruby web applications. He created and co-maintains the JDBC adapter for ActiveRecord that JRuby on Rails uses for database connectivity, as well as the Warbler tool and JRuby-Rack library for dealing with Java application server deployment. He maintains a blog on Ruby and JRuby-related topics at http://blog.nicksieger.com/.