URL Shortener

Design a system like bit.ly — takes a long URL, returns a short code, redirects at scale. 100M DAU, 1B redirects/day.

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• Requirements & Base Architecture

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  • Functional Requirements
  • Estimation
  • Non-Functional Requirements
  • API Design
  • Base Architecture

• Deep Dives

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  • Short Code Generation
  • Database
  • Caching
  • Peak Traffic
  • Pre-Generated Keys
  • Cold Storage
  • Fault Isolation

• Final Design & Observability

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  • Final Architecture
  • SLIs & SLOs
  • Measuring Latency
  • Measuring Availability
  • Alerting
  • Error Budget