Paul Berschick

Paul has been involved in the organization of conferences and tech events since 2014. At Plain Schwarz he is an allrounder, enjoying the full range of tasks: from the meticulous planning beforehand to the excitement (and troubleshooting) of event production. Paul studied Communications, Politics and Italian at Freie Universität Berlin. He is an avid committer of all things open source and implements it not only in his professional life. Paul likes sheep, great books and taking deep dives into all kinds of weird, special interest topics (Hello cricket, go well!)

Alexander Brateanu

Alex is interested in the interactions of technology and society. During his studies of political science and communication science at the Technical University of Dresden he organized political campaigns and promoted the use of open source software. As a project manager for FOSS Backstage he once again brings people together to exchange ideas and come up with new solutions.

Isabel Drost-Fromm

Isabel Drost-Fromm is Open Source Strategist at Europace AG Germany. She's a member of the Apache Software Foundation, co-founder of Apache Mahout and mentored several incubating projects. Isabel is interested in all things FOSS, search and text mining with a decent machine learning background. True to the nature of people living in Berlin she loves having friends fly in for a brief visit - as a result she co-founded and is still one of the creative heads behind Berlin Buzzwords, a tech conference on all things search, scale and storage.

Max King

Max has been involved in conference organizing in one way or another since 2013 when he started working with the conference team at The Royal College of Physicians. In 2016 Max moved from London to Berlin where he worked as an English teacher before joining Plain Schwarz’s predecessor company newthinking in 2017. As Communication and Community manager Max is responsible for keeping the world up to date on all Plain Schwarz projects. Max is also a wannabe radio show host, cat fan, and emoji enthusiast .

Nina Müller

Before organizing open source events, Nina has worked in the music as well as in the weather data industry. At Plain Schwarz, she is the leading project manager for Berlin Buzzwords and is further responsible for customer acquisition and consultation. Nina helps to reinforce our strong network of open source actors and communities and likes to connect the dots to form new relationships. She is also a great fan of solving all kinds of puzzles, riddles and liquorice.


Stefan Rudnitzki works as Head of Technology at idealo internet GmbH. He has over 10 years experience working as software developer, project lead and team lead in different working environments. From waterfall to agile working methods up to holacracy he experienced the different challenges and benefits in the area of free and open source software. Additionally he is an organizer of the MongoDB user group and Async Cat Herding meetup in Berlin. Furthermore he is the co-founder of the FOSS Backstage conference.