I applied online. The process took 4 weeks. I interviewed at LinkedIn (Sunnyvale, CA) in Feb 2015
Interview
The interview process was easy, included 3 rounds.
The first was HR-technical round followed by in detail technical and troubleshooting.
Last round was on site, the questions were simple yet tricky. They play around the words.
Interview questions [1]
Question 1
Types of OSPF packets.
Avoiding loops in BGP.
iBGP & eBGP.
I applied through a recruiter. The process took 1+ week. I interviewed at LinkedIn (Calabasas, CA) in Mar 2016
Interview
2 Skype video type interviews including a shared electronic whiteboard. Very cordial engineers. They want folks who are quick on their feet. Who doesn't. I did not get job but they were nice.
I applied through an employee referral. The process took 1 day. I interviewed at LinkedIn (Dublin, Dublin)
Interview
Role play and STAR based interview with hiring manager. Can sometimes be a peer interview based on culture fits, they do want to make sure they dont hire people who wont "get" the culture, and how important that is