E-mail me: q84fh (at) q84fh (dot) net.
I’m using GPG for e-mails: public key.
My preferred messenger is Signal: +48 52 561 05 69 (this number is also reachable via PSTN)
My calendar with free/busy information is available in ICS format here: calendar.ics
You can send me money via: revolut.me/q84fh