One of the internal recruiter, scheduled interview for 10 am and started calling me at around 9:50 to ask where I am at and why am I late in a very unpolite manner. It is ended up that he scheduled my interview at 9:30 with the team. The interview went smoothly besides someone was trying to get into the meeting room because they thought they booked it, the telephone was not working properly for the phone interview and stuff was not able to provide me wifi password. The company is not using Slack for internal communication, they are a traditional 9-5 corporate company.