Screening call, take at home coding tasks, algorithmic/coding interview via Skype, culture contribution call, on site interview. In that order.

Intercom HR and Recruitment departments made sure I understand every part of the interview process and were very helpful during the complete interview process.

Flood fill algorithm, image processing example?

During the problem solving session at on-site: You're given a list of strings, e.g. ['dog', 'fog', 'god', 'cat', 'big', 'tac']. Find all anagram pairs.