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Filtered by tag: System Design
A complete 10-week Low Level Design curriculum explained topic by topic: OOP, object modeling, SOLID, design patterns, concurrency, and 22 machine-coding problems (Parking Lot, Chess, LRU Cache, Kafka, RAG, AI agents) with interview-ready TypeScript implementations.
A complete 10-week High Level Design curriculum: the interview framework, capacity estimation, CAP, load balancing, consistent hashing, caching, sharding, replication, Kafka, and 19 case studies (URL Shortener, feeds, WhatsApp, Uber, payments, ChatGPT, RAG) explained topic by topic.
REST API contracts — endpoint naming, versioning, request-response structure, and error design. Interactive explorer comparing v1 vs v2 payloads.
Where to cache, how to invalidate, and consistency trade-offs — with an interactive simulator for hit ratio, latency, and multi-layer caching.
How entities are stored, related, and indexed — with an interactive ER explorer, normalization trade-offs, and interview reasoning for scalable schemas.
Traffic distribution, session stickiness, health checks, and failover — with an interactive load balancer playground for round robin, least connections, and sticky sessions.
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