Roblox | Software Engineer | Interview Experience
Interview Date: Not specified
Result: Not specified
Difficulty: Not specified
Interview Process
During the phone screen, I was asked to design a rate limiter that limits the number of API calls a user can make in a given time frame. I explained the concept of rate limiting and discussed various algorithms, ultimately choosing to implement a token bucket algorithm. In this approach, tokens are added at fixed intervals and consumed upon each API call. If a user attempts to make a call without available tokens, they receive an error response.
I wrote the code to implement the token bucket, ensuring thread safety for concurrent access. The interviewer engaged with me by asking follow-up questions about performance implications and potential edge cases. Overall, it was a technical interview that assessed both my coding skills and understanding of rate limiting concepts.
Technical Questions
- Rate Limiting (Design)
Tips & Insights
Be prepared to explain the underlying concepts of algorithms and consider edge cases during your implementation.