First they took a screening round and that was useless, second was a technical round taken by a newbie (in skills) . Third one was taken by an experienced guy he was kinda lazy and wasn't explaining probelms well
the interview process may be smooth for every one first you have to shortlisted based on your resume and the job title then the HR will call you for the interview schedule
Interview has 4 rounds
1st round is written (peogramming, mcq, apptitude)
2 - 3 rd round face to face from python, djano, sql and data syructure
4th round HR for discussing salary and other things .