On the 1st and 2nd of June [*varia*](https://varia.zone) will host 'The Ecosystem Is Moving', a lecture by and worksession with Daniel Gultsch about federated instant messaging, open source software and the sustainability of open systems.
Daniel Gultsch is the developer behind [Conversations](https://conversations.im), an open source instant messaging application for Android. In 2014, he decided to work full time on Conversations and try to <!-- PELICAN_END_SUMMARY --> make a living from it. Rather than starting from scratch with Conversations, he built it as a client for the existing federated messaging protocol XMPP.
Since an XMPP messenger can, in a way, only be as good as the entire ecosystem, Daniels work on Conversations also meant work on expanding and improving that larger XMPP ecosystem. This work includes helping to draft and implement protocol standards, such as OMEMO, a modern and user-friendly end-to-end encryption based on Signal's protocol. He also contributed code to other XMPP servers and clients in the ecosystem to bring them up to speed with modern uses. Additionally, [through his critical essays](https://gultsch.de/xmpp_2016.html) he is a vocal defender of XMPP and open standards in general.
Conversations is notable because, through its continuous focus on user experience, design and security it has garnered a lot of interest for both itself and the XMPP ecosystem as a whole. This makes it an interesting example to talk about what the design field could potentially contribute to critical software practices.
