Your Software Works. But Can You Break It?

Your Software Works. But Can You Break It? You built your application. Login works. Payments work. The dashboard works. Everything looks perfect. But have you tried using it the wrong way? Imagine your API has: GET /api/users/15/account What happens if someone changes 15 to 16? If your backend simply returns user 16's data without checking whether the requester is allowed to access it, that's a serious security problem. This is why developers need to think beyond: “Does this feature work?” We also need to ask: “What happens if someone tries to abuse this feature?” When building applications, think about: Authentication Authorization Input validation Rate limiting Token security Access control File upload security Logging and audit trails And with AI generating more code than ever, this becomes even more important. AI can write the code. You are still responsible for understanding what that code does. So don't just test whether your software works. Test how it behaves when someone tries to make it fail.