https://cloudmato.com/tags/clean-code/Recent content in Clean-Code on cloudmato.comHugo -- gohugo.ioencloudmato.comcloudmato.comTue, 02 Jun 2026 18:48:23 +0530https://cloudmato.com/posts/oop-mistakes-programmers-make/Tue, 02 Jun 2026 18:48:23 +0530cloudmato.comhttps://cloudmato.com/posts/oop-mistakes-programmers-make/<p>OOP has been around for fifty years. Everyone in software has taken a course on it. Most have read about SOLID, inheritance, encapsulation, polymorphism. And yet — I keep seeing the same design mistakes in codebase after codebase, from startups to enterprise projects.</p> <p>Knowing the theory is not the same as writing good OOP. Here&rsquo;s where it actually goes wrong.</p> <h2 class="header-anchor-wrapper">The God Object <a href="#the-god-object" class="header-anchor-link"> <svg xmlns="http://www.w3.org/2000/svg" width="1rem" height="1rem" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"> <line x1="4" y1="9" x2="20" y2="9"></line><line x1="4" y1="15" x2="20" y2="15"></line><line x1="10" y1="3" x2="8" y2="21"></line><line x1="16" y1="3" x2="14" y2="21"></line> </svg> </a> </h2> <p>Start a project, create a <code>UserService</code> class. Someone adds payment logic to it. Then notification handling. Then authentication checks. Six months later: a 2000-line file that does everything, depends on everything, and breaks every time anyone touches it.</p>