https://sudoexplain.dev/ An engineer's notebook on core concepts, system design, AI and the problems I hit along the way, written to clear the doubts that tripped me up. en https://sudoexplain.dev/posts/stale-caches-explained/ https://sudoexplain.dev/posts/stale-caches-explained/ Sun, 01 Nov 2026 00:00:00 GMT Why two servers give different answers, how to spot a stale cache, three ways to fix it, and how a cache stampede can follow. https://sudoexplain.dev/posts/sessions-jwt-and-load-balancers/ https://sudoexplain.dev/posts/sessions-jwt-and-load-balancers/ Sat, 31 Oct 2026 00:00:00 GMT A beginner's walkthrough: what sessions and JWTs are, what breaks when you add a second server, how to diagnose it, and how to fix it.