Hi, I'm Johannes Filter.

Hi, I’m

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

I'm a Berlin-based software developer, data scientist 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.

Currently, I'm working for the NGO AlgorithmWatch to hold Big Tech accountable.

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. I write about my investigative reporting using German FOIA laws on ifg.jfilter.de (in German).

Because I still believe in the liberating effect of open-source software, I regularly contribute to it on GitHub. Also, I blog about tech and programming (in English).

Check out my previous work or follow me on Twitter.

Here a short bio about myself.