Software Engineering Lessons from Production Breaks

🚨 The unwritten laws of software engineering Most of the lessons that actually matter in software engineering aren’t written down anywhere. You learn them after something breaks in production. A few that always seem to come up. If something breaks after a deploy, it’s probably related to your change. Backups don’t count until you’ve actually restored them. Logs always seem fine until you really need them. Every dependency will fail at some point. And nothing is more permanent than a “temporary fix”. There’s also that classic moment where alerts are firing everywhere and you’re thinking “there’s no way it’s related”… and it is. These aren’t new ideas, but most of us only take them seriously after we’ve felt the pain ourselves. Good engineering isn’t just about building things that work. It’s about building systems that fail safely, recover quickly, and don’t take everything down with them. #SoftwareEngineering #DevOps #SRE #Engineering #Programming #TechLessons

The backup one is the most consistently violated in practice. I have seen teams with documented restore procedures discover years later that their scripts had never been run against the actual schema migrations that accumulated since they were written. The deploy correlation rule is the flip side: it forces you to own the blast radius of every change you ship rather than hoping the alert pattern proves it was something else. These stick because you only really learn them after something breaks at 3am and there is nobody else to blame.

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