1st round: Recruiter phone call. Very standard call talking about past experiences and technologies used in the current job. 2nd round: Hackerrank code test. DSA test involving multiple big lists and ways to work with the to retrieve useful information in the most performatic way. 3rd round: Systems design. Show a complex system you have worked with recently and draw it on a whiteboard while explaining the tradeoffs. 4th round: OOP. The goal was to draw a class diagram for a proposed system.