No contact with HR in the interview I had. Only with staff and manager. That should be a must in every company that worries about staff, as many questions are targeted to HR and there is no "correct person" to pose them to besides someone in this position, so they will remain unanswered.

1h30min interview, divided into three segment with three different people interviewing. First part about the python test made (project), then about different project you might work on and then a personal interview.