The company has employees from Google, Facebook, and Microsoft. They are the top sponsors of TopCoder and other math competitions.

Employees are super smart, perhaps smarter than those at top tech companies. It is definitely the first finance company, although it is a technology company, where engineers are first-class citizens.

Screen: HackerRank Coding Round - 2 hard problems Phone Interview: All technical questions, including a coding problem Onsite: 6 rounds + 1 lunch (4 coding + 2 technical discussions and design)

The problems were similar in complexity to those at Google or Microsoft; the kicker is that you code on a computer instead of a whiteboard.

Bitwise Operation: Add one to a number without using +

Given a phone keypad and a Knight (from Chess), find out if you can form a phone number using all the possible moves of the Knight. If you can, then return all possible phone numbers as a list of strings.

For example: The Knight moves in an L-shape in any direction. We can say that it either moves two squares sideways and then one square up or down, etc.

Find out all the possible numbers. Digits in the number can repeat.

Find the bug in a library provided by Google; they introduced the bug themselves.

Find all the subsets of size k.