home / system-design
// system design

System Design
Interview Prep

End-to-end breakdowns of real interview questions. From requirements to architecture to tradeoffs.

01
System Design Design an E-commerce Platform Product catalog, cart, inventory, payment processing, and order management at scale.
Hard Mar 31, 2023 ↗
02
System Design Design a Map Web App Geo-indexing, tile rendering, routing algorithms, and location search at scale.
Hard Apr 01, 2023 ↗
03
System Design Design a Video Streaming Platform CDN strategy, encoding pipeline, chunked delivery, and millions of concurrent viewers.
Hard Apr 01, 2023 ↗
04
System Design Design a Chat App WebSockets, message fan-out, presence indicators, and real-time delivery.
Medium Apr 01, 2023 ↗
05
System Design Design a Ride-share App Geo-indexing, driver matching, surge pricing, and trip state machine design.
Hard Apr 01, 2023 ↗
06
System Design Design a URL Shortener Hash collision handling, redirect latency, analytics tracking, and custom slugs.
Medium Apr 01, 2023 ↗
07
System Design Design a Hotel Booking App Inventory locking, double-booking prevention, search ranking, and payment flows.
Medium Apr 01, 2023 ↗
08
System Design Design Google Drive / Dropbox File chunking, content-addressed dedup, metadata vs block storage, sync, and conflict resolution.
Hard Apr 08, 2023 ↗
09
System Design Design a Distributed Key-Value Store Consistent hashing, quorums, replication, vector clocks, and gossip — Dynamo-style.
Hard Apr 09, 2023 ↗
10
System Design Design Pastebin Key generation, metadata vs blob storage, read-heavy caching, and expiration.
Medium Apr 10, 2023 ↗
11
System Design Design Search Autocomplete (Typeahead) Tries, precomputed top-k suggestions, ranking, and the offline data pipeline.
Medium Apr 11, 2023 ↗
12
System Design Design Nearby / Yelp (Proximity) Geospatial indexing with geohash and quadtrees, the boundary problem, and caching.
Medium Apr 12, 2023 ↗
13
System Design Design a Leaderboard Redis sorted sets for O(log n) rank, persistence, sharding, and approximate rank.
Medium Apr 13, 2023 ↗
14
System Design Design a Payment System Idempotency, the double-entry ledger, exactly-once, reconciliation, and sagas.
Hard Apr 14, 2023 ↗
15
System Design Design Ticketmaster Seat holds and locking to prevent oversell, the virtual waiting room, and consistency.
Hard Apr 15, 2023 ↗
16
System Design Design ChatGPT — an AI Chat Assistant Streaming (SSE), the GPU inference layer, an LLM gateway, memory & RAG, and cost tradeoffs.
Hard Jun 16, 2026 ↗
17
System Design Design a RAG System at Scale Chunking, the vector index (ANN), hybrid retrieval, reranking, and grounded answers with citations.
Hard Jun 16, 2026 ↗