Onsite had following rounds:

1. Technical round
   https://leetcode.com/problems/all-oone-data-structure/
   Didn't have time to implement this, we mostly discussed the approach verbally
2. Technical round
   https://leetcode.com/problems/flatten-nested-list-iterator/
3. System design
   Heavy hitters/top K exceptions from the logs
4. Craftsmanship
   Not very impressed with the format of the interview. Answers in the format - the time when I did this...
5. Manager conversation / experience round