I applied through university. The process took 2 weeks. I interviewed at MongoDB
Interview
1. Call with a recruiter, asked why I was interested in MongoDB. Let me know at the end of the interview that her colleague would be reaching out about scheduling a 1-hr technical interview. After talking to friends who also applied, this stage is actually important in determining whether you get a technical interview. Know why you want to work at MongoDB!
2. Highly technical interview: covered CS fundamentals (binary search trees, garbage collection, maps, sorts), operating systems, 3 programming questions on a collaboration site. Lasted the full hour.
Interview questions [1]
Question 1
What is the difference between mergesort and quicksort?
I applied through a recruiter. I interviewed at MongoDB (Dublin, Dublin) in Mar 2026
Interview
Some behavioral questions and a rate limiter coding question with a staff engineer. They really wanted full proof code with no syntax errors and no interviewer guidance. Felt like the interviewer was not attentive.
Saw a fresh ad online, applied quickly and got a quick follow-up from recruiter. So far so good. Well, that's where it ends. After the recruiter call was scheduled, I got completely ghosted.
The interview process was seamless, and the recruiter was helpful and communicative throughout the process. The interviewers were friendly and knowledgeable. The interviews included DSA, Design, Concurrency, and Behavioural aspects. Had a great experience overall.
Interview questions [1]
Question 1
Data Structures and Algorithms, Concurrency, Multi-Threading, Design, Behavioural
