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System design interview question · Backend

Design a search autocomplete service

Suggest useful completions quickly as users type into a search box.

Intermediate 40 minutesSearch Plus
More Backend questions

Concepts this round covers

  • Prefix indexing
  • Ranking and freshness
  • Sharding and caching
  • Search

This is a Plus round

The brief, the scale to design for, the questions interviewers ask and the common mistakes for this round are available to Plus members. Plus is coming soon.

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Design a URL shortener

Build a service that turns long links into short, shareable URLs.

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Design a chat system

Create a real-time messaging experience for millions of people.

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Design a news feed

Deliver a relevant, fresh feed as people and publishers post.

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Design cloud file storage

Sync large files reliably across devices and collaborators.

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Design an API rate limiter

Protect a public API without slowing down well-behaved clients.

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Design video streaming

Stream adaptive-quality video to a global audience.

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