As maintainer of Sinatra, Konstantin is an Open Source developer by heart. 

Ruby has become his language of choice since 2005. He regularly contributes to different widespread projects, like Rubinius, Rack, Travis, Rails and MRI.


In 2012, Konstantin received the Ruby Hero Award for his outstanding
contributions to the community.

He now currently works full time on Open Source projects at Travis CI.

Presentations by Konstantin Haase:

  • Rails Israel 2013 Conference, Wednesday, October 9, 2013, 11:00

    What happens when you not only ignore every coding advice you've ever got but willingly do the opposite. Go against every guideline you have encountered, write code that pretends to work.

    * Prepare for the strangest code slides yet.

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