The hiring process is competitive and aimed at filtering apt candidates all the way upto offer with well thought process. The HR is well structured at coordinating the interviews and arranging the travel, tickets etc for the on-site ones. The on-site interviews are a unique experience. The software developer round is like any other core-development interview (with Amazon, Indeed etc), with focus on Algorithm and then optimization. You will definitely crack this, if you are already working in a serious coding environment. The tricky ones are Architecture interviews, because none of the conventional understanding would work here. You may be able to approach the question with the right solutions, but unless you hit the right "jargon" word, the interviewer won't give you points. So its hinged on following aspects -- Design a system with zero single points of failure. -- Describe algorithms for peak data handling -- Describe acceptable Turn Around Time and fault tolerance. It needs basic knowledge of Load Balancers, DB Sharding, In-Memory Caches and products like Redis, fast-config lookup such as ZooKeeper, and of-course the ability to knit them altogether.