Round 1 (~1 hours)

Problem 1: Graph colouring problem. Dont remember exact problem but related to bipartite graphs and dividing graph into two. Solved with solution. Medium
Problem 2: Linked list problem. Deep copying a linked list with Next pointer and Random pointer on every node. Solved with solution with a follow up (required some help here). Medium
Additional: Brief discussion on my experience with scale and payment systems.

Round 2 (~1.5 hours)

Focus: HLD of payment systems.
We started with a simple payment service and then had in-depth discussion on availability and reliability aspects of payment systems.
Also discussed a scheduler service.
Used excalidraw for diagrams and texts.

Round 3 (~1.5 hours)

Focus: HLD of Payment systems.
Discussion around vendor integration and challenges faced in order completion flow. On reconciliation systems.
Emphasis was placed on system scalability, fault tolerance, and real-world trade-offs.
Used excalidraw for diagrams and texts.
Discussion on LPs like disagree and commit, leading by example etc.

Offer details

https://leetcode.com/discuss/post/6673237/grab-sse-offer-bangalore-by-littlestar64-8rfy/

Thank you.