There are 4 rounds. First is a decent DSA Problem Solving Round. Second round is a machine coding round. Once you clear these two rounds, you directly talk with the two co-founders in their specific round.
Do not apply to this company and wait for a better opportunity. They made me a vague offer and after multiple requests to provide me with a offer letter with conditions like Notice Period, etc. I was called immature (to ask for what the terms I would be signing). When I brought up the point of notice period, the co-founder clearly had a 3 month notice period in mind but as I bluntly said that I would not even consider a company with 3 month notice period, he made it exactly what my current notice period is (verbally only).
No terms and conditions are sent to you in written. They already said in interview that work will be 6 days a week, so pretty sure that it will be there on Sundays as well. I strongly advice to not join this company, (I was gonna, but glad that I did not).