There were around 6 rounds:

• Screening coding round (problem around hash maps and string manipulations)
• Coding round (string manipulations)
• Code review round: They asked you to review some code they wrote.
• System design: They asked you to add to an already existing system. This round was tough because I had to understand the system, and it was described poorly on paper.
• Deep dive: A deep dive into technical problems you worked on.
• Manager discussion: Similar to the deep dive, but covered other behavioral aspects.