The first round was an HR phone screen.

The second round was a video conference with a developer, which included behavioral, teamwork, and previous project-related questions, along with a technical component.

The third round was an onsite interview with two technical interviews, an informational session, and food.

They also held a bowling event the night before the onsite, as it was for college recruits.

2nd round: String compression and decompression.

3rd round: Print certain shapes with characters (like a right-angle triangle with asterisks).

A data structure/algorithm question that I can't remember but was wrapped up as if it were a problem Grubhub might face in terms of orders, restaurants, users, etc.