CodeRefinery Zulipchat

The CodeRefinery zulipchat is where our primary discussion, planning, and action takes place. Many things are announced only via zulipchat. This is a public chat and everybody is welcome to join, no invitation needed, and we explicitly invite anyone to give ideas in any thread.

The chat is a joint community of CodeRefinery (teaching), NordicHPC (infrastructure), and Nordic-RSE (usage and software), which are other Nordic projects about scientific computing which share some of the same people. Together, we have a network of all aspects of modern scientific computing.

Unlike Slack, zulipchat is very heavily threaded, and it is easy to follow along without being active all the time. Respond within the topic (=thread) that is relevant, or make a new thread. Sometimes you can find old threads to revive. Don’t worry, everything is flexible and you’ll quickly learn by watching (and don’t worry about going wrong).


Once you join the chat, you will be subscribed to some default streams (a stream is basically a channel). The first thing you should do is join some more streams, depending on your interest. Join more streams by clicking gear icon by the steams list on the left side on that chat, then selecting what you are interested in.

Gear icon to join a stream

If you mute a stream, you can see the contents if you click on it, but you won’t get notifications. If you mute a topic, it will be hidden from view but you can later unmute it in your personal settings. Under stream settings, you can request email notifications for all messages in a certain stream (possibly useful for the announce streams).

CodeRefinery streams:

  • #general: Any topic and random chat (including for the other projects below)

  • #coderefinery: About the project itself. CodeRefinery members should be in this channel.

  • #lessons: CodeRefinery lesson discussion, one for each lesson we maintain.

  • #workshops: Organizing workshops and other events. One topic for each event.

  • #workshop-chat: High-volume staff chat during workshops. You typically join during a workshop, and leave when done to avoid the flood.

  • #help: Ask questions and get advice from others. Tell interesting things you learned via “TIL”s

  • #new members: Feel free to introduce yourself here

  • #announce:

  • #infrastructure: CodeRefinery gitlab talk.

Nordic research software engineer community:

Nordic HPC:

  • #NordicHPC: NordicHPC. Discussion about computing infrastructure (not just HPC)

Misc streams in our sphere of influence:

You can make topical private streams for groups that significantly overlap with our community. Currently, Zulip admins can’t add themselves or others to private streams.


Zulipchat can be used in a web browser, there’s a desktop app, mobile apps, and even a terminal client installable using pip.


All activity (except private steams) should be considered public, and the data controller is Zulip admins can’t add themselves or others to private streams, but still: there is no contract guaranteeing confidentiality.