// TOPIC
#security
3 articles
◆◆IntermediateSalesforceAWS
01Multi-Tenancy — Silo, Pool, and the Noisy Neighbor Problem
Should each customer get their own stack or share one? Tenant isolation models, noisy neighbors, blast radius, and how cross-tenant leaks actually happen.
#architecture#isolation#database
19 min◆◆IntermediateStripeSvix
02Design a Webhook Delivery System
Design a webhook delivery system: fan-out queues, retries with backoff and jitter, HMAC signing, circuit breakers, and dead-letter redelivery at Stripe scale.
#interview#messaging#queues
18 min◆◆◆AdvancedGoogleAuth0
03Design an Authorization System (Google Zanzibar / RBAC / ReBAC)
Answer "can user U do action A on resource R?" globally, in milliseconds, consistently. RBAC vs ABAC vs ReBAC, Zanzibar relation tuples, and the new-enemy problem.
#interview#security#distributed-systems
25 min