Round 1: HackerRank OA
2 questions, don't remember exact questions since it happened long back but it was on Arrays & Strings (Medium).

Round 2: System Design
Design Email system which should be scalable. The round went for more than 30 minutes.
The interviewer was convinced with the HLD design and wants me to explain the web tier, security tier, database tier separately.

Asked for simple Database schema to write and read the email contents efficitently.
Specifically how we will store video, audio data ( I mentioned s3 buckets)

Round 3: DSA
Two normal easy to medium Leetcode Array/String problems. Once you got the output you need to explain the approach clearly.

Round 4: Role Specialisation:
Started with intro both sides then jumped to project discussion in depth.
Gave 2 java code scenarios in hackerrank and wanted to execute it. Related to OOPS.
Basic to advanced concepts of Java, Spring boot and microservices.

Round 5: Bar Raiser
The interviewer started with his long intro then asked me to introduce me. It lasted for 40 mins with 4 scenario based questions and upon answering each question the interviewer discussed the correct approach before going to next question.