The interview was the first part of three. It was done from home and took a whole day which is a bit excessive for a first interview. however, it had 3 parts and on each part you didn't pass you were told, so for some it didn't actually take the whole day. The first part was a leetcode style test. it lasted about an hour and a half. It had about a half of theoretical questions about multithreading and math and the other half was to implement some searching algorithm. The second part was to write a small project from scratch in about two hours. We were given some very vage description of what should be done and had to think and execute design and implementation. it didn't have any complex algorithms though it was more technical.