[MalcolmDiggs]

Lot's of interview seems normal. But the best companies I've interviewed at have figured out ways to condense the process into one day on-site. So you might go in and have 4 or 5 different interviews with different people back to back, but you only had to show up on-site once.

[bsg75]

Multiple offline stages might be acceptable, but it would be a red flag to me if they can't conduct the necessary in-person interviewing in a single day, unless they can communicate the process in advance.

Cases where they can't get everyone together at one time speaks to a lack of coordination.