I interviewed with Grubhub contacted by recruiter. The whole process took 4 week. Inital phone screening consist of regular LC medium question. Onsite consist of 4 rounds, LC question, Java/OOP design, architecture design, and HR questions. Everyone is very friendly and insightful. Director and engineers are all excited about their work and they are doing interesting and fun work. Would definitely give a recommend for going through their hiring process and work there. Personally I have received better offers, elsewise I would for sure pick Grubhub otherwise.