The latest articles on DEV Community by Nitish Kumar Tiwari (@mainsonejaarha). https://dev.to/mainsonejaarha https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4235273%2F6bfb3ba2-6cb4-4bb1-bbe3-91a950ade894.jpg https://dev.to/mainsonejaarha en Nitish Kumar Tiwari Tue, 10 Nov 2026 07:33:36 +0000 https://dev.to/mainsonejaarha/got-some-traction-over-it-boosting-this-post-for-more-traction--m2k https://dev.to/mainsonejaarha/got-some-traction-over-it-boosting-this-post-for-more-traction--m2k <div class="ltag__link--embedded"> <div class="crayons-story "> <a href="https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4" class="crayons-story__hidden-navigation-link">I built HLDArena — a LeetCode-style online judge for High-Level Design (HLD) &amp; System Design</a> <div class="crayons-story__body crayons-story__body-full_post"> <div class="crayons-story__top"> <div class="crayons-story__meta"> <div class="crayons-story__author-pic"> <a href="/mainsonejaarha" class="crayons-avatar crayons-avatar--l "> <img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4235273%2F6bfb3ba2-6cb4-4bb1-bbe3-91a950ade894.jpg" alt="mainsonejaarha profile" class="crayons-avatar__image" width="96" height="96"> </a> </div> <div> <div> <a href="/mainsonejaarha" class="crayons-story__secondary fw-medium m:hidden"> Nitish Kumar Tiwari </a> <div class="profile-preview-card relative mb-4 s:mb-0 fw-medium hidden m:inline-block"> Nitish Kumar Tiwari <div id="story-author-preview-content-5004793" class="profile-preview-card__content crayons-dropdown branded-7 p-4 pt-0"> <div class="gap-4 grid"> <div class="-mt-4"> <a href="/mainsonejaarha" class="flex"> <span class="crayons-avatar crayons-avatar--xl mr-2 shrink-0"> <img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4235273%2F6bfb3ba2-6cb4-4bb1-bbe3-91a950ade894.jpg" class="crayons-avatar__image" alt="" width="96" height="96"> </span> <span class="crayons-link crayons-subtitle-2 mt-5">Nitish Kumar Tiwari</span> </a> </div> <div class="print-hidden"> Follow </div> <div class="author-preview-metadata-container"></div> </div> </div> </div> </div> <a href="https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4" class="crayons-story__tertiary fs-xs"><time>Nov 9</time><span class="time-ago-indicator-initial-placeholder"></span></a> </div> </div> </div> <div class="crayons-story__indention"> <h2 class="crayons-story__title crayons-story__title-full_post"> <a href="https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4" id="article-link-5004793"> I built HLDArena — a LeetCode-style online judge for High-Level Design (HLD) &amp; System Design </a> </h2> <div class="crayons-story__tags"> <a class="crayons-tag crayons-tag--monochrome " href="/t/systemdesign"><span class="crayons-tag__prefix">#</span>systemdesign</a> <a class="crayons-tag crayons-tag--monochrome " href="/t/hld"><span class="crayons-tag__prefix">#</span>hld</a> <a class="crayons-tag crayons-tag--monochrome " href="/t/leetcode"><span class="crayons-tag__prefix">#</span>leetcode</a> <a class="crayons-tag crayons-tag--monochrome " href="/t/beginners"><span class="crayons-tag__prefix">#</span>beginners</a> </div> <div class="crayons-story__bottom"> <div class="crayons-story__details"> <a href="https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4#comments" class="crayons-btn crayons-btn--s crayons-btn--ghost crayons-btn--icon-left flex items-center"> <span class="hidden s:inline">Add&nbsp;Comment</span> </a> </div> <div class="crayons-story__save"> <small class="crayons-story__tertiary fs-xs mr-2"> 1 min read </small> <div class="only-sidebar-menu-item trusted-visible-block print-hidden align-center"> </div> </div> </div> </div> </div> </div> </div> architecture showdev systemdesign Nitish Kumar Tiwari Mon, 09 Nov 2026 14:01:11 +0000 https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4 https://dev.to/mainsonejaarha/i-built-hldarena-a-leetcode-style-online-judge-for-high-level-design-hld-system-design-hi4 <p>Hey everyone,<br> Practicing DSA is interactive because online judges immediately tell you if you hit <code>AC</code> or <code>TLE</code>, whereas practicing <strong>High-Level Design (HLD) / System Design</strong> usually means passively reading blogs with no way to test your architecture.<br> So I built <strong>HLDArena</strong>: <a href="https://hldarena.vercel.app" rel="noopener noreferrer">https://hldarena.vercel.app</a><br> <strong>What it does:</strong></p> <ul> <li> <strong>Draw &amp; explain:</strong> Wire your system architecture on a whiteboard canvas and write a short plain-English HLD spec.</li> <li> <strong>Deterministic 60s simulation judge (zero LLM randomness):</strong> Stress-tests your design against viral traffic spikes, hotkey skew, DB crashes, p99 latency SLOs, and monthly cloud cost budgets.</li> <li> <strong>Objective verdicts &amp; ratings:</strong> Gives <code>AC</code>, <code>TLE</code>, <code>SPOF</code>, <code>OVER_BUDGET</code>, etc., a scrubbable 60s telemetry replay, and a competitive rating graph across Easy → Expert HLD problems. It's free to try at <a href="https://hldarena.vercel.app" rel="noopener noreferrer">https://hldarena.vercel.app</a> — would love your feedback if you test out a problem!</li> </ul> systemdesign hld leetcode beginners