System Design9 min read
System Design: Distributed Job Scheduler
Designing a cron-at-scale system - priority queues, exactly-once execution, retry with dead letter queues, and the monitoring that keeps it honest.
Blog
10 postsLong-form articles and short thoughts on AI, product, and engineering.
System Design9 min read
System Design: File Storage Service
Designing S3-like object storage - chunking, deduplication, CDN integration, and the metadata layer that ties it all together.
System Design8 min read
System Design: Distributed Cache
Consistent hashing, eviction policies, cache stampede prevention, and the Redis vs Memcached decision you'll actually face in production.
System Design8 min read
System Design: Payment System
Idempotency, double-entry bookkeeping, webhook handling, and PCI compliance - the system where bugs cost real money.
System Design8 min read
System Design: Search Engine
Inverted indexes, query parsing, BM25 ranking, and autocomplete - designing an Elasticsearch-like search system from scratch.
System Design8 min read
System Design: News Feed
Fan-out on write vs read, ranking algorithms, and the caching strategy behind Facebook and Twitter's news feeds.
System Design8 min read
System Design: Real-Time Chat System
Designing a WhatsApp/Slack-scale chat system - WebSockets, message ordering, presence indicators, and read receipts.
System Design7 min read
System Design: Notification System
Push, email, SMS - designing a multi-channel notification system with priority queues, delivery guarantees, and template engines.
System Design7 min read
System Design: Distributed Rate Limiter
Token bucket, sliding window, and the Redis scripts that make distributed rate limiting actually work at scale.
System Design6 min read
System Design: URL Shortener
Designing a bit.ly-scale URL shortener - Base62 encoding, redirect latency, analytics, and the caching layer that makes it fast.