The interview process consisted of one phone interview followed by an onsite with five rounds. These included coding, algorithms, and one round focused on past experience.

I performed quite well in the phone interview. The interviewer complimented me at the end and assured me his input would be positive.

I did well on three of the four technical interviews. In one of the design interviews, I gave what I believed was the right answer, but it was clearly not what the interviewer expected. I couldn't get any guidance on what they might have been looking for.

I felt I did well discussing my past experience. It was hard to gauge, as it was very subjective and the two interviewers were quite poker-faced.

I did not receive an offer. This is the second time I've interviewed there, performed very well, and still did not get an offer.

I asked the recruiter to call me so I could understand what went wrong. The recruiter agreed that I performed very well in the technical and design interviews. I was told that I did not have enough experience in design in my most recent jobs. This makes no sense, as a big reason I left those jobs was that I wasn't getting the opportunities I wanted. I don't expect to be doing high-level design the moment I join a company; that's unrealistic.

The recruiter suggested I find a job doing high-level design elsewhere and then reapply to LinkedIn. Fat chance. I'm done with them. I am an older engineer and wonder if this played a role.

I was asked to design a Bitly-type system that would be highly scalable.