IBM Software Engineer - Full Stack interview questions
based on 48 ratings - Updated Apr 16, 2026
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Software Engineer - Full Stack applicants have rated the interview process at IBM with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 68.5% positive. This is according to Glassdoor user ratings.
Candidates applying for Software Engineer - Full Stack roles take an average of 7 days to get hired, when considering 1 user submitted interviews for this role. To compare, the hiring process at IBM overall takes an average of 28 days.
Common stages of the interview process at IBM as a Software Engineer - Full Stack according to 1 Glassdoor interviews include:
Skills test: 100%
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I applied online. The process took 1 week. I interviewed at IBM in Feb 2019
Interview
I had an amazing interview experience. One of the best out of most of the big tech companies. The interviewer was super talkative and gave a lot of information about his background and the culture at IBM.
Interview questions [3]
Question 1
I was given a super hard riddle that I was told no other candidate was able to solve. This was asked to test how you would think about the problem.
You are given a list of n-1 integers and these integers are in the range of 1 to n. There are no duplicates in list. One of the integers is missing in the list. Find the missing number.
(Didn't have to code just talked through my thought process)
The interview process was very straight forward. The questions were not very technical. There were no coding questions. I was just asked about my past experiences. The technical questions that were asked were mostly like trivial short answer questions
the interviewers are very kind. The questions are not hard, just some basic algorithms and data structure questions. I think what they really care about is the culture fit. They said there would be a very comprehensive mentorship so no need to worry if I don't have too much work experience before.