1. Phone interview, which is 30 mins
2. Tech interview, answer some basic programming questions.
3. Codepen coding interview, you need to solve two problems within 30 mins. You should explain what you did, what alg/data structure you used. And why you used them.
Interview questions [1]
Question 1
Asked several coding questions like the time complexity of certain algorithms. You need to know those common ones like traversing trees.
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
