I applied through an employee referral. The process took 5 days.

There was miscommunication everywhere. Right from the recruiter to the interviewer, everyone was confused and I ended up wasting a complete day interviewing for them. The interviewer did not know what exactly he wanted to ask and couldn't give proper responses to the questions asked for the assignment. I am not sure why they are interviewing.

Implementing a working prototype of one of their products.

I felt they wanted to get free consultation out of the interview by giving their tasks to the interviewees lol.