They had 4 rounds - the first round was coding, and the rest were theoretical machine learning rounds. Focusing on NLP and statistical ML. Transformers, attention mechanism. Stats ML - logistic, linear regression.

Reached out by a recruiter followed up by an introduction call. 2 rounds (1 hour each) after the HR call with each round being a mix of behavioral and technical questions. The interviewers were very friendly and want to see you succeed.