Interview process was smooth, I had 4 rounds. But they didn't inform me why they declined me an offer. 1st round: General discussions with Hiring Manager + one assignment related to MBTA Public APIs. 2nd round: Discussions around the code I wrote for the assignment. 3rd round: DS Algo, group anagram. How to solve in O(n) 4th round: System Designing, a proxy kind of system 5th round: Discussions with Hiring Manager again, she asked how you can design gmail, behavioral questions.