Pretty standard process with at least 5 stages with all the relevant stakeholders (including your future direct colleagues). At least 3 fully technical interviews. Everything is online. Pretty much every interview detail is shared beforehand, so that you'd have good understanding of what to expect.
Interview questions [1]
Question 1
Quite a few things are written with c++ in company, so everything what you'd expect from real work: language features, containers and std lib, concurrency, api and system design. Every interview starts as an open ended problem, so it's not straight forward to solve as any simple coding or algo question. You'd need to know your stuff, but you are going to be safe if you've spent some 5-10 years really working on some complex projects. Simply grinding leetcode/sysdes is only partially useful.
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. 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