jdfive

Course

HLD Interview Questions

End-to-end designs interviewers actually ask

Full problem breakdowns — from URL shortener to ChatGPT serving — so you can practice the delivery framework on real prompts. Pair with theHigh Level Designcourse for frameworks and patterns, andTech Deep Diveswhen a design leans on a specific technology.

Start with URL Shortener

Syllabus

Problems

Problem breakdowns

End-to-end designs for products interviewers actually ask about.

  1. 1URL Shortener
  2. 2Distributed Rate Limiter
  3. 3Distributed Cache
  4. 4Web Crawler
  5. 5Job Scheduler
  6. 6Metrics & Monitoring
  7. 7Dropbox — File Sync
  8. 8YouTube — Video Platform
  9. 9Instagram — Social Feed
  10. 10WhatsApp — Messaging
  11. 11Uber — Marketplace Matching
  12. 12Ticketmaster — Event Tickets
  13. 13News Feed Ranking
  14. 14Live Comments at Scale
  15. 15Social Post Search
  16. 16Collaborative Docs
  17. 17News Aggregation
  18. 18Yelp — Local Discovery
  19. 19Tinder — Matching
  20. 20Strava — Activity Feed
  21. 21LeetCode — Contest Platform
  22. 22Payments Pipeline
  23. 23Robinhood — Trading
  24. 24Online Auction
  25. 25Ad Click Aggregator
  26. 26Price Tracker
  27. 27Gopuff — Quick Commerce
  28. 28Top-K Videos
  29. 29ChatGPT — LLM Serving