Applied in Naukri. Got a call from CTO, had initial screening about my skills and experience in the domain. Then 1. there was a online ML challenge, 2. After that there was a F2F technical interview round, where I was asked to write code for a given problem statement and some more questions on data science domain. 3. Round 3 was telephonic with CEO and CTO, 4. Next(last) round was Aptitude test.