The latest articles on DEV Community by Leonardo (@leonardo_rocha). https://dev.to/leonardo_rocha https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3813249%2F64b2d3b8-3c3f-4a1d-a19a-4fbff0c57e67.png https://dev.to/leonardo_rocha en Leonardo Sun, 08 Mar 2026 17:38:34 +0000 https://dev.to/leonardo_rocha/why-understanding-the-clients-domain-matters-more-than-writing-code-5dj7 https://dev.to/leonardo_rocha/why-understanding-the-clients-domain-matters-more-than-writing-code-5dj7 <p>Many developers believe the hardest part of building software is writing the code.</p> <p>But in many real-world systems, the real challenge is understanding the <strong>business domain</strong>.</p> <p>During two years working on the development of a complex national system, I realized that many problems weren't caused by bad code — they were caused by misunderstandings between developers and domain experts.</p> <p>Concepts like <strong>Ubiquitous Language</strong>, from Domain-Driven Design, exist exactly to solve this problem by aligning the language used by both sides.</p> <p>When developers and domain experts share the same vocabulary, systems become easier to design, evolve, and maintain.</p> <p>In the full article, I explore:</p> <ul> <li>why many software problems are actually <strong>domain problems</strong> </li> <li>how <strong>ubiquitous language</strong> improves collaboration</li> <li>a real example of how domain understanding changed a system's design</li> </ul> <p>👉 Full article on Medium:<br><br> </p> <div class="crayons-card c-embed text-styles text-styles--secondary"> <div class="c-embed__content"> <div class="c-embed__body flex items-center justify-between"> <a href="https://medium.com/@rocha.pias.leonardo/why-understanding-the-clients-domain-matters-more-than-writing-code-492462920448" rel="noopener noreferrer" class="c-link fw-bold flex items-center"> <span class="mr-2">medium.com</span> </a> </div> </div> </div> <p>I'm curious to hear how other developers deal with <strong>complex domains</strong> in real-world projects.</p> architecture discuss softwareengineering systemdesign