You're reading the public-facing archive of the Category Theory Zulip server.
To join the server you need an invite. Anybody can get an invite by contacting Matteo Capucci at name dot surname at gmail dot com.
For all things related to this archive refer to the same person.
I'm posting these on behalf of Cihan Okay:
Open positions in the Bilkent Quantum & Topology Group (BilQCT) at Bilkent University (deadline May 15):