Hi, I’m Johannes Filter.

Hi, I’m

I develop open-source software to provide free access to information.

I'm an independent researcher, software developer and data analyst. My work is focused on human-computer interaction, machine learning and natural-language processing. Besides, I hold a master’s degree in computer science from the Hasso Plattner Institute in Potsdam, Germany.

I'm an activist for more transparency in the public sector and I'm part of the German open data / civic tech / freedom of information community. Because I still believe in the liberating effect of open-source software, I regularly contribute to it on GitHub.

I have a blog about tech and programming (in English). Also, I write about my investigative reporting using German FOIA laws on ifg.jfilter.de (in German).

Aside from my regular job I accept work as a freelancer. But I'm expensive so include your budget in your initial message. (I may counsel pro-bono if you're cool.)

Check out my previous work, follow me on Twitter and sign up to my newsletter.