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Dr. Stefan Kaes led Rails' core team effort to achieve acceptable performance for the 1.0 release. Stefan is a software consultant in Germany and previously taught programming at the Technical University of Darmstadt. He regularly contributes patches to Rails core and has a successful Rails performance blog, http://railsexpress.de/blog/. In January 2005 he discovered Rails by accident, learned Ruby in about a week, and became convinced this is the right way to develop web applications due to the simplicity, flexibility, and power achieved by the combination of the Rails design and Ruby's language characteristics.