Guided practice

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

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  43. Design YouTube Top-K

  The K most-viewed videos for the last hour, day, month and all time from 700,000 views a second, exactly and in milliseconds.

  ClassicMedium

  CachingDatabasesStreaming

  +7

  Distributed systemsAWSFlinkKafkaRedisSliding windowsTop-K

  Worked design

  Practice
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  81. Design a Proximity Search Service

  Radius, k-nearest and map-box search over places that rarely move and drivers that ping every few seconds: R-trees, geohash, H3 and S2 cells, Redis GEO and OpenSearch. One-hour boards for junior, senior and staff, with the theory.

  ClassicMedium

  CachingDatabasesSearch

  +6

  AWSGeohashGeospatialOpenSearchQuadtreeRedis

  Worked design

  Practice

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