Reddit Interview Question Bank
Reddit's loop runs on a small, slowly-rotating bank of company-specific coding prompts (Tennis Scoring, Report Chain, Chat Message Merge) paired with product-flavored system-design rounds (Game Leaderboard, Live Chat, Notification System). The bar is high on clean OOD and crisp clarification — multi-part prompts are routinely under-scoped on purpose, and rounds end without finishing all parts. Ads and ML Platform orgs add a hiring-manager domain round on top of the standard loop; recent cohorts also report aggressive down-leveling and long team-match limbo after a passing loop.
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OJ Problems
practice in the online judgeImplement an In-Memory Chatter Message StoreReplace Round-Robin Routing with Least-Latency RoutingImplement a Circuit Breaker for Backend ServersModerator Privilege Ranking System with Communities and DemotionMerge Chat MessagesImplement a Simplified Memcached ProtocolDesign a Tennis Match Scoring SystemCan Moderator A Remove Moderator B Based on Add OrderProcess Moderator Audit Logs: Order Moderators by Last Add TimeReddit Hack2Hire Coding Question (link provided)Coding 2 - Odd Even Linked ListCoding 1 - Shortest PalindromeReport ChainTennis Game Score ConversionReport Chain QuestionClassic Tennis QuestionSimple LeetCode questionMerge and Sort Chat MessagesBill StatusPrint Report ChainBillingStatus Class with Transactions, Overwrite, Undo, and RedoWatch Next Video Recommendation System for Reddit Mobile AppSearch Index Engine with Single, Multi-Word, and Phrase Queries