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System Design Tutorials
Architecture, scalability, and distributed systems concepts for system design interviews. Each tutorial includes HLD diagrams, sequence diagrams, and deep dives.
What is System Design?
Why system design matters and how to prepare.
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URL Shortener
Design bit.ly: hashing, base62, caching, analytics.
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Chat System
Design WhatsApp: WebSocket, message storage, presence.
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News Feed
Design Twitter feed: fan-out strategies, ranking, caching.
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CAP Theorem
Consistency vs availability trade-offs in distributed systems.
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Load Balancing
Algorithms, L4 vs L7, health checks, sticky sessions.
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Caching Strategies
Cache-aside, write-through, write-behind, Redis vs Memcached.
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Database Sharding
Horizontal scaling, shard keys, rebalancing strategies.
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Message Queues
Kafka vs RabbitMQ, pub/sub, delivery guarantees.
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Consistent Hashing
Hash ring, virtual nodes, minimal data migration.
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