System Design Drill Day 14: URL Shortener and Unique ID Generation
How to design a URL shortener: base62 codes, ID generation strategies, 301 vs 302 redirects, Redis caching and async click analytics.
#backend
Posts tagged #backend
System Design Drill Day 13: Designing a Multi-Channel Notification System
How to design a notification service with per-channel workers, priority queues, preferences, dedup and signed webhook retries.
System Design Drill Day 10: Circuit Breakers, Timeouts and Degradation
How circuit breakers, timeouts and bulkheads keep a checkout alive when the payment gateway or SMS provider starts failing.
System Design Drill Day 9: Idempotency Keys for Payments and Retries
Why retries make duplicates inevitable, and how idempotency keys stop double charges and double stock decrements.
System Design Drill Day 7: Rate Limiting APIs, Logins and OTPs with Redis
The main rate-limiting algorithms, how to run them atomically across servers with Redis and Lua, and when to fail open or closed.
System Design Drill Day 5: Load Balancing and Horizontal Scaling
How to go from one Laravel server to three behind a load balancer: algorithms, health checks, stateless servers and safe deploys.
