The latest articles on DEV Community by Aayushmaan Chakraborty (@aayushmaan_chakraborty_b4). https://dev.to/aayushmaan_chakraborty_b4 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%2F4214826%2Fcdfac795-755f-4644-8356-bd57254a4ea6.jpg https://dev.to/aayushmaan_chakraborty_b4 en Aayushmaan Chakraborty Thu, 29 Oct 2026 09:08:59 +0000 https://dev.to/aayushmaan_chakraborty_b4/i-built-a-free-placement-prep-platform-after-getting-frustrated-with-scattered-resources-heres-4l3n https://dev.to/aayushmaan_chakraborty_b4/i-built-a-free-placement-prep-platform-after-getting-frustrated-with-scattered-resources-heres-4l3n <p>I'm a third-year CS student and when placement season hit, <br> I kept running into the same problem.</p> <p>LeetCode for DSA. YouTube for system design. Random PDFs for OS/DBMS/CN. <br> GeeksforGeeks for aptitude. Some other site for HR questions.</p> <p>Five tabs minimum just to prep for one interview.</p> <p>So I built CrackIt — a single platform that covers everything.</p> <h2> What's inside </h2> <p><strong>DSA — 225+ questions</strong></p> <ul> <li>Tagged by company (Google, Amazon, Microsoft, Meta, Goldman Sachs, BNY Mellon, JP Morgan and 13 more)</li> <li>Beginner mode: Arrays → Strings → Hash Map → Two Pointers → Trees → Heaps. Easy before Medium. No overwhelm.</li> <li>Experienced mode: Full roadmap through Graphs, DP, Union Find, Tries, Monotonic Stack</li> <li>Progress bars per topic — see exactly how far you are in Arrays, in DP, in Graphs</li> <li>Notes per question — write your approach, auto-saves as you type</li> </ul> <p><strong>System Design</strong></p> <ul> <li>HLD Concepts — 55 concepts across 13 categories (Scalability, Caching, Messaging, Distributed Systems...)</li> <li>LLD Concepts — OOP, SOLID, all design patterns with examples</li> <li>Problems — 32 HLD problems + 28 LLD problems + 10 Machine Coding, all with free verified resource links</li> </ul> <p><strong>Core CS</strong></p> <ul> <li>OS, DBMS, CN — expandable Q&amp;A with company tags</li> <li>SQL — 7 topics with LeetCode practice links</li> <li>SE — Git, Testing, CI/CD, Clean Code, API Design</li> </ul> <p><strong>Aptitude &amp; Logical Reasoning</strong></p> <ul> <li>20 MCQ questions with full solutions and shortcut tricks</li> <li>Company tagged — filter by Goldman Sachs, BNY Mellon, JP Morgan etc.</li> </ul> <p><strong>HR &amp; Behavioral</strong></p> <ul> <li>20 questions with STAR framework answers</li> <li>Dos and don'ts for each question</li> <li>Company specific sections for fintech</li> </ul> <h2> Tech stack </h2> <ul> <li>Next.js 14 (App Router)</li> <li>Supabase (Auth + Postgres)</li> <li>Tailwind CSS</li> <li>PostHog analytics</li> </ul> <p>Google OAuth sign-in — progress syncs across devices.<br> Everything is free. No paywall. No login needed to browse.</p> <h2> Link </h2> <p>👉 <a href="https://crack-it-zeta.vercel.app" rel="noopener noreferrer">https://crack-it-zeta.vercel.app</a></p> <p>Would love feedback on what to add next. Building this in public.</p> webdev career javascript beginners