Guided practice

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

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  57. Design Post Search like Facebook

  Search a billion posts a day by keyword, newest or most liked first, with an inverted index you build yourself.

  ClassicMedium

  CachingDatabasesStreaming

  +7

  SearchDistributed systemsAWSDynamoDBInverted indexKafkaRedis

  Worked design

  Practice
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  71. Design a Search Engine like Elasticsearch

  Search a billion documents in 200 ms: inverted indexes, analysers, Lucene segments, shards and replicas, query then fetch with BM25, fed by CDC.

  ClassicMedium

  ShardingSearchDistributed systems

  +4

  AWSInverted indexLuceneOpenSearch

  Worked design

  Practice

Self-paced by default. Your answers and canvas stay private. AI feedback runs only when you ask for it.