// TOPIC
#kafka
5 articles
◆◆◆AdvancedAWSKafka
01Object-Storage-First: S3 Is Becoming the New Disk
Kafka, warehouses, observability stores, and Postgres are moving durable bytes to object storage. The cost math, the latency floor, and what still needs disks.
#architecture#storage#streaming
15 min◆◆IntermediateMetaGoogle
02Design a Notification System (Push, Email, SMS)
A reliable multi-channel notification platform — fanout, templates, dedup, rate limiting, and the realities of APNS/FCM.
#interview#notifications#messaging
18 min◆◆◆AdvancedMetaDiscord
03Design WhatsApp / Chat System
Realtime 1:1 and group messaging at billions-of-users scale. WebSocket gateways, message store, presence, end-to-end encryption.
#interview#realtime#websocket
18 min◆◆◆AdvancedMetaTwitter
04Design Twitter / X (the home timeline)
500M users, 500M tweets/day, p99 feed loads under 200ms. The fanout-on-write vs fanout-on-read trade-off that defines the system.
#interview#feed#fanout
18 min◆◆Intermediate
05Message Queues and Event Streams
Queues vs streams, Kafka in depth, delivery semantics, idempotency, dead-letter queues, schema registries, the outbox pattern, and stream processing fundamentals.
#messaging#asynchronous#kafka
18 min