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System Design
System Design: News Aggregator (100K Sources, Dedup, Personalized Ranking)

System DesignApril 5, 2026· 1 min read

System Design: News Aggregator (100K Sources, Dedup, Personalized Ranking)

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Goal: Build a news aggregation platform that:

Crawls 100K sources (RSS/Atom feeds, news APIs).

Ingests 5 million articles per day.

Deduplicates near-identical stories.

Ranks articles by relevance and freshness.

Serves personalized feeds to 50 million daily active users.

Supports breaking news detection with alerts, category classification, and multi-language content.

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System Design: Dropbox (File Sync, Chunking, and Deduplication)

System Design: E-Commerce Flash Sales (10M Users, Coupon System, One-Per-User Enforcement)

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