4 rounds. 1. First it was Hiring Team lead call which was general discussion. 2. Coding round where you're asked a simple question and are required to solve it. They care more about your programming style I believe. 3. More specific question with focus on the technology you're going to use. For my case, it was Spark. 4. System design round where you're asked general design question to design large scale system. You also have to pass a written assessment for coding.