Bring Slack to the front by using a global shortcut / hotkey

For Linux:
Go to Keyboards and add a custom shortcuts with command slack

For Windows:

• Download AutoHotKey, create a script with this:

^!j::
   Run C:\Users\liangzou\AppData\Local\slack\slack.exe
return

in it.

Then you can use ctrl + alt + j to bring Slack window to the front.