The phone interview lasted about 20 to 30 minutes. 2 men on the phone, but only 1 mainly asked. Ask about pdes; how to write and solve differential equations he also ask some basic programming questions. They are simple. I managed okay but it looks they are not interested somehow.

Standard HR interview to go through education, background, and job experiences. Another round with a member of the team on past achievements followed by a technical live coding test that's around leetcode medium difficulty. Was doing this while on vacation on the other side of the world at like 4am so I bombed it pretty bad but interviewer was courteous.