Be prepared to do research on the company for the in person interview and behavioral related questions for the video recording interview. The interview process was too short, as I had a phone interview an then had to fly in for an interview a day and a half later.
I didn't get the job which was a bummer, so it kind of felt like a lot of wasted effort, especially as the interview went extremely well and all my feedback was very positive. More annoying is that it took about 50 days to get my plane ticket paid by the company; I kept having to call and remind them as people kept making mistakes on the amount, forgetting about it, or leaving for vacation without finishing. Ultimately they paid me with six different bank reward cards that I can't use at the bank or an ATM which is just the icing on the cake. Why not send a check? Or just one card? I really wanted to work at Illumina initially and was very excited about the opportunity, but maybe it was for the best that it didn't work out.
All of the questions people have mentioned below, but usually with a second part to the question (EX: and why was this accomplishment important?)
The following metrics were computed from 17 interview experiences for the Illumina Engineer role in United States.
Illumina's interview process for their Engineer roles in the United States is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Illumina's Engineer interview process in United States.