This is such a comprehensive and honest write-up of your Juspay campus interview journey! It’s rare to find a post that covers all six rounds step-by-step, including the tough full-day hackathon Part B focusing on concurrency and thread safety. Sharing the full working code for Tree of Space both basic and optimized versions is a game-changer for all aspirants prepping for Juspay. I especially appreciated you mentioning the logical tree height puzzle in the final interview—most interview blogs skip these conceptual questions entirely. It takes effort to break down where you fell short and list key learnings openly. This post will definitely save tons of preparation time for other students aiming for their SDE intern role. Really appreciate you putting this out!