Your deploy just failed. Again. You’re staring at the rollback button like it’s an old friend. Why does this keep happening? It’s not bad luck. It’s patterns. And you can break them.
You Don’t Have Tests
Not “I have some tests.” I mean real tests. Unit tests that cover edge cases. Integration tests that verify the whole flow. If your testing strategy is “click around and hope,” you’re not testing — you’re gambling. Automated tests catch regressions before they reach production. Yes, writing tests takes time. But it’s cheaper than fixing production at midnight.
You’re Changing Too Much at Once
Big refactors feel productive. They’re not. They’re risky. When you rewrite 500 lines and something breaks, you have 500 lines of suspects. Make small, focused changes. Commit often. Deploy incrementally. If something breaks, you know exactly where to look. Small steps are faster than big leaps because they don’t send you backward.
Dependencies Are Your Silent Enemy
That npm package with 12 weekly downloads? It’s now part of your critical path. Dependencies break, get abandoned, or have security holes. Audit them regularly. Pin versions. Have a plan for when your favorite library dies. Every dependency is a bet — make sure you’re okay with losing.
You Ignore Warnings
Yellow squiggles in your IDE. Deprecation notices in the console. “This still works, so I’ll fix it later.” Later becomes never, and suddenly you’re on a deprecated version with no upgrade path. Warnings are early signals of future breaks. Treat them like errors. Fix them now, or they’ll fix you later.
No Code Review Culture
Pushing straight to main because “it’s just a small change”? I’ve seen one-line changes take down entire systems. Code review isn’t bureaucracy — it’s insurance. Fresh eyes catch what tired eyes miss. Even if you’re solo, review your own code after a break. Perspective matters.
You Don’t Understand the Business Logic
You built what was asked. But what was asked wasn’t what was needed. Misunderstood requirements lead to broken features that “work” technically but fail practically. Ask questions. Clarify edge cases. A little conversation upfront prevents a lot of rewriting later.
The Hard Truth
Code breaks because humans are imperfect. But you can be less imperfect. Test more. Change less. Review everything. Understand why you’re building what you’re building. Stability isn’t sexy, but it’s what keeps you sleeping through the night. And honestly? Good sleep is underrated.