Roblox Software Engineer Interview Experience — A Shared To-Do List Design and a Kafka Mistake

Roblox·Software Engineer·Aug 2026
Technical ScreenRejectedmedium

The system design question was the shared to-do list problem from the question bank. Unfortunately, I had not had time to prepare for it. This was also my first system design interview, so I did not perform very well.

I made one critical mistake by adding a Kafka queue. That made the system asynchronous and would affect the speed of the synchronous flow. The interviewer still interacted with me throughout the session and had a very good attitude. A few days after the interview, I received a rejection email.

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Curated and edited by PracHub

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Interview at a glance

Company
Roblox
Role
Software Engineer
Rounds
Technical Screen
Outcome
Rejected
Difficulty
medium
Interview date
Aug 2026
Questions from this interview
1 question

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