I applied through an employee referral. The process took 3 weeks. I interviewed at Illumina (San Diego, CA) in Sep 2016
Interview
I spoke with the hiring manager briefly over the phone before he said he wanted me to come in and meet the rest of the team. An on-site interview was scheduled a few days later for the next week. I met with 10 different people 1-3 people at a time. Everybody was very kind and welcoming.