Designs

Company tags are community-reported. Counts on cards show how many people reported that design.

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  6. Design a News Feed

  Build a paginated feed that handles high-fan-out authors, fresh posts and visibility changes.

  ClassicMedium

  CachingDatabasesStreaming

  +11

  PrivacyDistributed systemsAWSDynamoDBFan outKafkaNews feedPaginationRedisSocialTimeline

  Worked design

  Practice
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  88. Design a Reviews and Ratings System

  Dish reviews only from customers who ordered them, votes counted from a change stream, reviews ranked by the Wilson bound, payouts made exactly once.

  ClassicMedium

  DatabasesStreamingDistributed systems

  +7

  AWSDynamoDBKafkaRankingRatingsReviewsSocial

  Worked design

  Practice

Each design brings together the brief, practice, examples and discussion.