No whiteboarding, but there are questions on architecture and your standard set of coding problems. In lieu of the whiteboard, we encourage candidates to verbally walk us through their answers/solutions, and are free to use pseudo-code to illustrate.
Hey, also replied to the parent comment, but would also love feedback on if you'd like the interview process description changed at all for Mainstreet's listing here (I used your comment as the basis for the listings): https://nowhiteboard.org/