I applied through a recruiter. I interviewed at MongoDB (Dublin, Dublin) in Jun 2022
Interview
1. Recruiter call (found me on linkedin)
2. Basic technical screening (leet code medium)
3. Manager call - communications + background
4. 2x1hr behavioural interviews
5. System design - design whatsapp, for example
6. Pair programming - OO, patterns, Java API + communication with "junior" programmer
Interview questions [1]
Question 1
Over the entire process a wide range of questions.
To pass this interview, cover:
Leet code medium
OO concepts
Design patterns
Architectural patterns discussing trade-offs
Communicate while coding
Prepare some standard behavioural answers
Interviewer had a particular solution in mind that took a different approach from my own. My solution was algorithmically correct but not one that they were familiar with and preferred a non-closed form solution.
Interview questions [1]
Question 1
API design question with some standard library usage required.
I applied through a recruiter. I interviewed at MongoDB
Interview
Process was: Recruiter screening, Phone Screen, 5 Virtual Onsite. The whole process took a long time. I loved each interviewer, they were really friendly, nice and passionate with their work. The interview questions were unique and on the harder side but well organized.
I applied online. The process took 3 weeks. I interviewed at MongoDB in Oct 2025
Interview
Recruiter phone interview, a technical screen, then multiple technical interview rounds. I've gone through non-concurrent programming, concurrent programming, algorithms and the design one; didn't make it to the behaviorial and final interviews,
The process is well explained, and I have even got feedback afterwards.
Interview questions [2]
Question 1
Concurrent interview: design a concurrent expriring queue
