Reddit Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
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Reddit
Medium
Software EngineerImplement a sliding-window rate limiter
Problem Design and implement an in-memory rate limiter using a sliding time window. You are given a stream of requests. Each request has: - key (e.g.,...
Coding & Algorithms
0
0
Nov 10, 2025
Reddit
Medium
Software EngineerDesign comment-likelihood prediction platform
Scenario You’re building an ML platform component that serves a model to predict the likelihood that a user will comment on a given post. The intervie...
ML System Design
0
0
Nov 10, 2025
Reddit
Hard
Software EngineerDesign a feature store with CI/CD and reliability
System Design: Feature Store for Offline Training and Low‑Latency Online Inference Context You are designing a feature store to support machine learni...
ML System Design
0
0
Sep 6, 2025
Reddit
Medium
Software EngineerFind word sequence with 1–2 char changes
Given a beginWord, an endWord, and a dictionary (wordList) of unique same-length lowercase words, determine whether there exists a transformation sequ...
Coding & Algorithms
0
0
Sep 6, 2025