Jon Pretty

CEO @ Propensive

Jon has been involved in the Scala community for over a decade, having launched the first commercial and open-source Scala software back in 2005. Since then, he has successfully deployed Scala projects into small, medium and large businesses, and UK government, but is best known these days for his work on Rapture, the Scala World conference, and as chair of the Scala Center Advisory Board.


The type system underlies everything we do in Scala. It’s the basis that gives us confidence in our code, and our guilty conscience when we circumvent it. It provides an abstract model of the world, and still teaches us new things about our reality. It’s the rabbit we’ll chase for hours towards success, and the scorpion that will bite us in the dark. It validates us when it’s happy, and admonishes us when we transgress. It’s our pleasure and our pain, and I’m going to tell you all about it.

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