I am contributing to and developing open-source software since 2011. Most of my work is related to the Android operating system. Examples of projects I significantly contributed to (and are not mentioned in the next section) include microG and OpenKeychain.
I graduated with a master in computer science and am a self-employed software engineer. My research and professional focus are in mobile privacy, IT security and fintech. I currently live in south-western Germany. The nearest large city by train minutes is Paris.
Me and XMPP
My first development activity around XMPP in 2012 was an open-source client for Android based on Smack.  It was a total mess and I discontinued work on it just a few months after publication. I also experimented with a system-wide XMPP service for Android in 2014, but it never became useful for anything.  In 2015, I participated in Google Summer of Code under the XSF to develop DNSSEC functionality for minidns.  While originally developed for the use in Smack, it is now also used in Conversations as well as many other projects.
Since 2016, I am one of the main developers of Dino. Since 2018 I (co-)mentor Google Summer of Code students for Dino. I regularly participate in development sprints and help advertise XMPP on conferences. I am happily contributing my opinion on the mailing list and in xsf@ MUC. I became a member of XSF in 2019.
My personal interest in XMPP is user-friendly and secure personal and team communication (chats and calls) - this excludes IoT / machine-to-machine communication. I am happy to contribute further to XEPs as well as Dino and other XMPP-related open source projects, to make this reality.
|0421||Anonymous unique occupant identifiers for MUCs|
|0426||Character counting in message bodies|
|0446||File metadata element|
|0447||Stateless file sharing|
|0448||Encryption for stateless file sharing|
Meetups, Sprints and Conferences
Collection of Events where I participated to chat or work on XMPP things.
|January 2016||Brussels, Belgium||FOSDEM 2016|
|August 2018||Cambridge, United Kingdom||Sprint|
|December 2018||Leipzig, Germany||35th Chaos Communcation Congress|
|May 2019||Karlsruhe, Germany||Sprint at 19th Gulaschprogrammiernacht|
|July 2019||Lyon, France||Sprint|
|August 2019||Bonn, Germany||FrOSCon 14|
|August 2019||Zehdenick, Germany||Chaos Communication Camp 2019|
|September 2019||Berlin, Germany||Meetup|
|September 2019||Stockholm, Sweden||Sprint|
|October 2019||Munich, Germany||Meetup during GSoC 2019 Mentor Summit|
|December 2019||Leipzig, Germany||Sprint at 36th Chaos Communcation Congress|
|January 2020||Brussels, Belgium||Summit 24|
|February 2020||Brussles, Belgium||FOSDEM 2020|
|March 2020||Duesseldorf, Germany||OMEMO Sprint|
- Full name: Marvin Wißfeld
- XMPP address: jabber at larma.de
- e-Mail address: xmpp at larma.de
- XSF discussion username: larma