The first round was a phone screening, which included a logical puzzle and a brain teaser.

The second round was on-site in Dublin.

I was interviewed by three different managers/lead programmers. They had different questions and expectations, but none were highly demanding; the questions were simple and quick. I had to manage one hour of time per interview.

Reverse a linked list.

Least Common Ancestor (simple solution).

Some questions about hash functions used to identify huge structures.

Work experience: How do you handle bugs, crashes, and errors in a huge team?