4 rounds of technical interview (1 hour each). The theme of the interview mainly included a brief information of the company, programming tests heavily based on data structure ranging from easy to medium difficulty, and a little bit of system design. A word of caution for non-native English speakers. Since this is an international company with employees from different parts of the world, be prepared for different accents and word choices from the interviewers that could lead to any misunderstandings.