I have recently given interview at Chargebee and this post is about the whole interview experience. I have 10+ years of experience working as tech lead in decent well know product based company in banglore. it's been a while since i've had given any interview and this was me trying to find our what is expected out of me at this experience.

There were totally 5 rounds (3 technical, 1 bar-raiser (Technical + Behavioural) and last Behaviour round with VP).

First round [I hour]

1. Basic concepts on indexes, microservices, thread and general high level questions on java.
2. Cycle detection in Graph.

This round went well as per me. I was able to code the running solution with in 10 mins on IDE. This gave interviewer additonal time to dicuss more about the design concept and best project which i worked in past. It was a good conversation overall.

Second Round [50 mins]

1. This was mostly focused on high level + low level system design.
2. Question : Design a system where customer can search an item and get prices lists from diffrent systems (Amazon, eBay or Flipkart) .I think Interviewer was kind of satisfied with approach. However he was out of question, Hence i was able to come up with high level API design as well and could discuss how future use-cases can also be handled.

Third Round :[1 hour 10 mis]

1. 2 basic question on alogrithms. Discussed approach for one and implementated another. I forgot the question, it was related to circular array. If you know circular array then it's easy.
2. High level design question. Sorry I forgot the question.
3. I forgot there were addtional questions around design patterns.

Bar-raiser [1 hour 10 mins ]

1. Design question. This was not a standard question you can find in grokkign or internet but they wanted to implement into their platform. Hence I can't disclose this question.
2. In deptth discussions on microservices, monolith to micro-service migration. Discussions around scale, consitency, db syn startegies and saga.
   I felt interviewer was really smart there were no standard question asked, i did not do lot of prepration for during this process. i guess it worked out in my favour :)
3. There were many situation oriented/ behavioral questions.

VP round [ 1 hour 5 mins]

1. Puzzle. I did not solve the puzzle. I directly calculated the answer log10 base2 ~ 3. then i explained the reasoning about why binary search should be right answer for the question.
2. Behvaioral question + Leadership
3. Previous project experiences.

I got the offer letter with in 1 week.