The phone screen was surprisingly technical and lasted about 45 minutes, diving straight into system design.

I was asked to design a leaderboard service, which caught me off guard at first. But as I started to outline my approach, I realized it was similar to a challenge I’d practiced on prachub.com just days before.

The subsequent technical rounds were intense, focusing on DSA problems and scalability issues.

In the end, I got an offer that I happily accepted, despite the difficulties I faced throughout the process.

Design a leaderboard service that supports tens of millions of concurrent players. Cover top-K queries, neighbor-rank queries, partial sharding, and consistency tradeoffs.