Approximately 8 rounds of technical interviews, with thorough questioning on projects handled in the past. Once a candidate clears the tech interviews, there are managerial and HR rounds, which should not be too difficult.
Most of the questions are around algorithms.
The following metrics were computed from 1 interview experience for the IBM Software Researcher role in India.
IBM's interview process for their Software Researcher roles in India is incredibly easy as the vast majority of engineers get an offer after going through it.
Candidates reported having very good feelings for IBM's Software Researcher interview process in India.