Björn Schießle
Computer Scientist (Dipl. Inf.), graduated at University of Stuttgart
Co-founder and Sales Engineer at Nextcloud
Active in the Free Software movement for over 20 years
FSFE's coordinator Germany and member of the General Assembly

What you do makes a difference, and you have to decide what kind of difference you want to make.Jane Goodall


As a child science kits were always one of my favorite toys. This way I discovered already early in my life the world of biology, chemistry, electronics and other exiting stuff. I was always driven by the childlike curiosity to understand how things work instead of just using it. Today I'm still like that. That's probably also the reason why my first computer soon lead me down the rabbit hole in the world of programming and Free Software (aka Open Source).

During my education and professional career I collected deep knowledge about programming and the design and architecture of software systems. After I graduated I joined the university as a researcher in the area of Cloud Robotics. During this time I learned a lot about academic research and writing and enjoyed the challenge to solve complex tasks. After University I joined ownCloud for four years before I co-founded Nextcloud. After almost seven years as a Software Engineer, designing and developing technologies like Cloud Federated or the Global Scale architecture I work now as a Sales Engineer. Using my deep technical knowledge about free, decentralized and open collaboration platforms, I strive for designing the best possible solutions for our customers.

Being involved in the Free Software movement for over 20 years lead to a deep knowledge about Free Software, Open Standards and software licenses. Today I'm fascinated about how technology shapes our society and how society can shape technology. Free Software is not just a black-box people can use, instead it enables everyone to understand it and adapt it to their needs. In a world driven by technology this are important rights for individuals, organisations and big enterprises. I love to discuss this new possibilities, attend related trade shows and think about how Free Software can enable a business to grow and adapt to the future.

If I look back at the end of a working day I want to have the feeling that I did something useful for my company, our customers and for the society as a whole. That's why I love working with people from all over the world in a open and collaborative environment, driven by Free Software and Open Standards.


University of Stuttgart

Diplom (equivalent to M.Sc.), Computer Science


  • Free Software / Open Source
  • Software Licenses
  • Software Engineering
  • Cloud Computing
  • API Design
  • Distributed and Federated Systems
  • Web Applications
  • GNU/Linux
  • PHP
  • JavaScript
  • Version Control (Git, SVN, CVS)
  • C/C++
  • Qt
  • Python


Nextcloud GmbH
since 1/2019

Co-Founder & Sales Engineer

I use my experience of developing various components of Nextcloud for almost seven years to provide the best possible solutions for our customers. As a Sales Engineer I'm acting as a broker between the customer, sales and the engineering team. I enjoy working with our customers and partners, listen to their needs and design an architecture together with them which meets their needs and integrates perfect into their existing infrastructure and workflows.

Nextcloud GmbH
6/2016 - 12/2018

Co-Founder & Senior Software Engineer

Engaging with a globally distributed community, encourage them and help them to get involved is a vital part of my daily work in a company build around a healthy and diverse Free Software (aka Open Source) project. As a senior software engineer I'm working on the server component of Nextcloud using object oriented PHP, JavaScript, HTML and CSS. During my time as a Software Engineer I developed the concept of Cloud Federation, a technology which enables a completely new way of collaboration in a free, distributed and open way without losing control over personal and sensitive data by connecting otherwise independent cloud servers. Further I was the principle architect of the Global Scale architecture, a architecture which allows you to scale Nextcloud to million of users by splitting the system up into many independent servers while maintaining a single-instance user experience. Beside that I serve as a Free Software and licensing expert at Nextcloud. All my work done at Nextcloud can be found at GitHub.

ownCloud Inc.
6/2012 - 5/2016

Senior Software Engineer

My responsibilities include maintaining and expanding the core of ownCloud along with working with a globally distributed community of contributors using object oriented PHP, JavaScript, HTML and CSS. I'm the maintainer of various core modules including server-side encryption, deleted files, versioning and sharing.

University of Stuttgart
2010 -5/2012


Working at the RoboEarth project which is part of the Cognitive Systems and Robotics Initiative from the European Union Seventh Framework Programme FP7/2007-2013. Developing a distributed web-based platform which enables robots to share reusable knowledge about actions, objects and environments.

Voluntary Work

Free Software Foundation Europe (FSFE)
since 8/2017

Coordinator Germany (voluntary)

Coordinate the activities of the German country team at FSFE. One of our main task is to promote Free Software to enable people to control the technology they use. My main task is to support our team in its day to day work for Free Software, to make sure that they can achieve the best results possible. I visit trade shows regularly and give speeches about Free Software. Further I serve as a contact person for all topics regarding Free Software in Germany.

Free Software Foundation Europe (FSFE)
since 2006

Member of the German Country Team, the European Core Team and the General Assembly (voluntary)

Educate people about the political, social and economical implications of Free Software (Open Source) and Open Standards. I give talks at various trade shows and other events about Free Software and related topics. Occasionally I talk to political parties, their youth organizations and companies to advise them about Free Software and licensing. Since 2016 I'm a member of the General Assembly.

Free Software Foundation Europe (FSFE)
9/2015 - 7/2017

Deputy Coordinator Germany (voluntary)

Coordinate the activities of the German country team at FSFE to promote Free Software. This enables people to control the technology they use.


  • Jury Member of the Vertical Innovation Hackathon at the Souht Tyrol Free Software Conference 2017
  • Member of the organizing committee of the Autonomous Mobile Systems (AMS) 2012 in Stuttgart
  • Member of the RoboCup Team 1. RFC Stuttgart, Department Image Understanding (Institute of Parallel and Distributed Systems) at the University of Stuttgart, Germany (2008 - 2012)


  • Die Abkehr von freier und unabhängiger Software in München wäre falsch - Kommentar auf Netzpolitik.org
  • Werkzeugkasten Freie Software - Einführung in die Grundlagen Freier Software zusammen mit einer Sammlung von sinnvoller Software, mit der Unterricht in einem digitalen Zeitalter gestaltet werden kann. Autoren: Volker Grassmuck, Daniel Rohde-Kage, Björn Schießle, Stefan Schober, Sebastian Seitz, Wolf-Dieter Zimmermann (2016)
  • Software Heritage – Erhalt eines Kulturerbes - Gastbeitrag auf Netzpolitik.org
  • 10 Jahre Sony Rootkit – ein fragwürdiges Jubiläum - Gastbeitrag auf Netzpolitik.org
  • User Data Manifesto 2.0 - Gastbeitrag auf Netzpolitik.org
  • Defensive Publication: Cloud file syncing encryption system. Hugo Roy and Björn Schießle (2014)
  • Freie Software – Ein wachsender Faktor in Wirtschaft und Gesellschaft. Erschienen im Handbuch der Unternehmensberatung, 2013, Band 2, Kennzahl 3410, Erich Schmidt Verlag
  • Free Software, Open Source, FOSS, FLOSS – Same same but different - Article about the differences and history of the various terms used in the Free Software movement.
  • Creating and using roboearth object models. CRA, pages 3549–3550, 2012. Daniel Di Marco, Andreas Koch, Oliver Zweigle, Kai Häussermann, Björn Schiessle, Paul Levi, Dorian Gálvez-López, Luis Riazuelo, Javier Civera, J. M. M. Montiel, Moritz Tenorth, Alexander Clifford Perzylo, Markus Waibel, and René van de Molengraft
  • Server-sided automatic map transformation in roboearth. AMS, pages 203–216, 2012. Alexander Clifford Perzylo, Björn Schießle, Kai Häussermann, Oliver Zweigle, Paul Levi, and Alois Knoll.
  • RoboEarth - A World Wide Web for Robots. IEEE Robotics and Automation Magazine (Special Issue Towards a WWW for Robots), 2011. Accepted - Waibel, M., Beetz, M., D’Andrea, R., Janssen, R., Tenorth, M., Civera, J., Elfring, J., Galvez-Lopez, D., Häussermann, K., Montiel, J.M.M., Perzylo, A., Schießle, B., Zweigle, O., and van de Molengraft, R. (2011)
  • Using Situation Analysis Techniques with Bayesian Networks for Recognizing Hardware Errors on Mobile Robots - Oliver Zweigle, Kai Häussermann, Björn Schiessle and Paul Levi (ICRA 2011)


FSFE FIfF EDRi Digitale Gesellschaft e.V.

Feel free to connect with me at Vutuv, LinkedIn or Xing. But if you want to get in contact with me, the best way to do so is by e-mail.