Contacted by HR after I applied online. Initial phone screen interview with the hiring manager. It was a 1 hour technical coding with whiteboard sharing. After I cleared the phone screen, HR contacted for final rounds. Took 4 days. Final interview was a panel of 6 people in a span of 2 days. Interviews were based on coding, data structures, algorithms, past experience in the position, scenario based questions, and logic building.

Check the design routing flow using a graph.

Be prepared for BFS/DFS-based questions, binary tree traversal questions, and graph algorithm questions.