1. Distributed Metrics Logging & Aggregation System
Companies: Google, Facebook, Amazon, eBay, Datadog, Atlassian
2. Distributed Stream Processing System (like Kafka)
Companies: Amazon, Microsoft, Wise, Confluent
3. Key-Value Store
Companies: Apple, Google, Canva, Avalara, Rubrik, OpenDoor
4. K Most Shared Articles in Time Windows (24h, 1h, 5m)
Companies: LinkedIn, Facebook,
