Let me start by saying, interviewing at GrubHub was absolutely a waste of time. My interviews went really well, and at the end, I was rejected for a very frivolous reason: the tech stack didn't match what they were looking for. The recruiter had been calling me for six months to interview and was negligent about the tech stack on my resume the entire time. After spending the day interviewing at Grubhub, the reason for rejection was not convincing.

Phone interview (30 minutes).

Onsite interview with three Tech Leads and a Director:

a) Design a book library. b) Write a linked list in Java. c) Architectural problem related to dispatch delivery.