Architect Practice

Apr 7, 2026 · Backend Development

The 8 Characters in a Text Message Reveal Hidden Challenges in Short‑Link System Design

This article walks through the end‑to‑end design of a lightweight short‑link service, covering why short links are needed, the choice of 302 redirects, key‑generation strategies (MurmurHash vs ID‑based base62), caching layers, security threats, scaling techniques, and practical pitfalls, all illustrated with concrete code and benchmark numbers.