I interviewed for a similar position at Microsoft before and did not go through the final on-site. For this position, they set up an initial technical phone screen instead of the online assessment. After that, there were four rounds of technical interviews.

Initial Phone Screen: Coding (Arrays, Trees) - LeetCode Medium.

1st Virtual On-site Interview: Coding (Strings) - Easy.

2nd Virtual On-site Interview: System Design.

3rd Virtual On-site Interview: System Design.

4th Virtual On-site Interview: General Manager interview. Felt like "As-Appropriate," mostly behavioral with some technical questions.

System design questions were specifically tailored to their product.