The latest articles on DEV Community by The Lazy Coder (@the_lazy_coder). https://dev.to/the_lazy_coder 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%2F3944285%2F29e6e7be-133d-452f-8b37-def2cd9d6164.png https://dev.to/the_lazy_coder en The Lazy Coder Thu, 28 May 2026 13:25:13 +0000 https://dev.to/the_lazy_coder/top-10-low-level-design-lld-interview-questions-for-software-engineer-interviews-4h68 https://dev.to/the_lazy_coder/top-10-low-level-design-lld-interview-questions-for-software-engineer-interviews-4h68 <p>Low Level Design (LLD) questions are commonly asked in software engineering interviews and machine coding rounds.</p> <p>Below is a curated list of the most frequently asked LLD interview problems.</p> <p>Note: Each problem links to a detailed solution with Java code, UML class diagrams, and explanations.</p> <h2> Top 10 Low Level Design Interview Questions </h2> <h3> 1. <a href="https://lldcoding.blogspot.com/2026/05/designing-parking-lot-low-level-design.html" rel="noopener noreferrer">Designing a Parking Lot System</a> </h3> <h3> 2. <a href="https://lldcoding.blogspot.com/2026/05/design-elevatorlift-system.html" rel="noopener noreferrer">Design an Elevator / Lift System</a> </h3> <h3> 3. <a href="https://lldcoding.blogspot.com/2026/05/design-movie-ticket-booking-system.html" rel="noopener noreferrer">Design a Movie Ticket Booking System</a> </h3> <h3> 4. <a href="https://lldcoding.blogspot.com/2026/05/design-real-time-chat-application.html" rel="noopener noreferrer">Design a Real-Time Chat Application</a> </h3> <h3> 5. <a href="https://lldcoding.blogspot.com/2026/05/design-food-deliveryordering-system.html" rel="noopener noreferrer">Design a Food Delivery System (Zomato/Swiggy)</a> </h3> <h3> 6. <a href="https://lldcoding.blogspot.com/2026/05/design-ride-sharingbooking-system.html" rel="noopener noreferrer">Design a Ride-Sharing System (Uber/Ola)</a> </h3> <h3> 7. <a href="https://lldcoding.blogspot.com/2026/05/design-rate-limiter-system.html" rel="noopener noreferrer">Design a Rate Limiter System</a> </h3> <h3> 8. <a href="https://lldcoding.blogspot.com/2026/05/design-splitwise-system.html" rel="noopener noreferrer">Design a Splitwise System</a> </h3> <h3> 9. <a href="https://lldcoding.blogspot.com/2026/05/design-atm-system.html" rel="noopener noreferrer">Design an ATM System</a> </h3> <h3> 10. <a href="https://lldcoding.blogspot.com/2026/05/design-chess-game.html" rel="noopener noreferrer">Design a Chess Game</a> </h3> <h3> Also See </h3> <ul> <li><a href="https://lldcoding.blogspot.com/2026/05/most-frequently-asked-low-level.html" rel="noopener noreferrer">Most Frequently Asked LLD Interview Questions</a></li> </ul> <p>*Originally published at <a href="https://lldcoding.blogspot.com*" rel="noopener noreferrer">LLD Coding</a></p> lowleveldesign systemdesign interview softwareengineering The Lazy Coder Thu, 28 May 2026 13:24:39 +0000 https://dev.to/the_lazy_coder/most-frequently-asked-low-level-design-interview-questions-for-software-engineers-3p40 https://dev.to/the_lazy_coder/most-frequently-asked-low-level-design-interview-questions-for-software-engineers-3p40 <p>Below is a curated list of the most commonly asked Low Level Design (LLD) interview problems.</p> <p>Each problem includes a short explanation and a link to the complete solution with Java code, UML class diagrams, and detailed walkthroughs.</p> <h2> 1. Design Parking Lot System </h2> <p>The system handles parking for different vehicle types such as bikes, cars, and trucks. It manages slot allocation, availability tracking, and entry/exit flow under varying load conditions.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/designing-parking-lot-low-level-design.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 2. Design Elevator / Lift System </h2> <p>The system supports multiple elevators across floors with request handling logic. It focuses on scheduling algorithms to optimize movement and reduce waiting time.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-elevatorlift-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 3. Design Movie Ticket Booking System </h2> <p>The system allows users to browse movies, select shows, and book seats. It handles seat locking and ensures consistency during concurrent bookings.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-movie-ticket-booking-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 4. Design Snake and Ladder Game </h2> <p>The system simulates a board game with dice rolls, player turns, snakes, and ladders. It manages movement rules and determines winning conditions.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-snake-and-ladder-game.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 5. Design Hotel Management System </h2> <p>The system manages room inventory, booking, check-in/check-out, and reservation updates across multiple room types.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-hotel-managementbooking-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 6. Design Food Delivery System </h2> <p>The system manages restaurants, orders, and delivery assignment. It tracks the full order lifecycle from placement to delivery.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-food-deliveryordering-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 7. Design Library Management System </h2> <p>The system manages books, issuing, returning, and user borrowing history while tracking multiple copies and availability.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-library-management-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 8. Design Notification System </h2> <p>The system sends notifications via email, SMS, and push channels. It routes messages based on user preferences and ensures retry mechanisms for failures.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-notification-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 9. Design Real-Time Chat Application </h2> <p>The system enables real-time messaging between users with low latency. It supports one-to-one and group chats with message history and presence tracking.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-real-time-chat-application.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 10. Design Ride Sharing System </h2> <p>The system matches riders with nearby drivers and manages trip lifecycle. It calculates fares dynamically and handles booking and cancellation.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-ride-sharingbooking-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 11. Design E-commerce System </h2> <p>The system manages product catalog, cart operations, checkout flow, inventory tracking, and order history.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-e-commerceonline-shopping-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 12. Design Splitwise System </h2> <p>The system handles shared expenses, tracks balances between users, and simplifies debt settlement.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-splitwise-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 13. Design File Storage System (Google Drive / Dropbox) </h2> <p>The system manages file uploads, folder hierarchy, sharing permissions, and scalable storage retrieval.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-file-storage-system-like-google.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 14. Design Rate Limiter System </h2> <p>The system controls request traffic and enforces limits per user or service within time windows.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-rate-limiter-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 15. Design Airline Reservation System </h2> <p>The system manages flight search, seat booking, and reservations with concurrency-safe booking logic.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-airline-reservation-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 16. Design ATM System </h2> <p>The system handles withdrawals, balance checks, authentication, and secure transaction processing.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-atm-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 17. Design Shopping Cart System </h2> <p>The system manages cart items, pricing, updates, and checkout flow with user persistence.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-shopping-cart-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 18. Design Social Media Platform </h2> <p>The system supports posts, feeds, likes, comments, and follow relationships at scale.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-social-media-platform-like.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 19. Design Online Bookstore System </h2> <p>The system manages book listings, search, orders, inventory, and recommendations.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-online-bookstore-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 20. Design Meeting Scheduler System </h2> <p>The system handles meeting scheduling, participant availability, and conflict resolution.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-meeting-scheduler-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 21. Design Order Inventory Management System </h2> <p>The system manages inventory, stock levels, and ensures orders are placed only when stock is available.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-order-inventory-management-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 22. Design Customer Issue Resolution System </h2> <p>The system manages customer complaints, ticket workflows, and escalation handling.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-customer-issue-resolution-system.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 23. Design Chess Game </h2> <p>The system simulates chess gameplay with board setup, piece movement rules, check, checkmate, and full game state management.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-chess-game.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> 24. Design Text Editor / Word Processor </h2> <p>The system supports document creation, editing, formatting, versioning, undo/redo, and collaborative-ready architecture.</p> <p><a href="https://lldcoding.blogspot.com/2026/05/design-text-editorword-processor-like.html" rel="noopener noreferrer">View Full Solution</a></p> <h2> Also See </h2> <ul> <li><a href="https://lldcoding.blogspot.com/2026/05/top-10-low-level-design-lld-interview.html" rel="noopener noreferrer">Top 10 LLD Interview Questions</a></li> </ul> <p><em>Originally published at <a href="https://lldcoding.blogspot.com" rel="noopener noreferrer">https://lldcoding.blogspot.com</a></em></p> lowleveldesign systemdesign interview softwareengineering The Lazy Coder Thu, 21 May 2026 14:22:34 +0000 https://dev.to/the_lazy_coder/software-engineer-resume-templates-ats-friendly-40eh https://dev.to/the_lazy_coder/software-engineer-resume-templates-ats-friendly-40eh <p>For software engineers, a resume is a simple document with a single purpose: get a recruiter or hiring manager to take the next step. </p> <p>After reviewing discussions in engineering communities and feedback from engineers at <strong>Google, Amazon, Microsoft, and Meta</strong>, I’ve put together a curated list of templates that are consistently used to land interviews at top-tier companies and FAANG.</p> <p>These aren't "fancy" or "creative" they are clear, predictable, and <strong>ATS-optimized</strong>.</p> <h2> 1. The "FAANG-Proven" McDowell CV (LaTeX) </h2> <p>If you only use one template, make it this one. This layout is a refined version of the <strong>McDowell CV</strong> (by the author of <em>Cracking the Coding Interview</em>). It was famously used by community members to land SDE roles at Google, Amazon, and Meta.</p> <ul> <li> <strong>High Density:</strong> Fits a massive amount of technical signal onto one page.</li> <li> <strong>ATS-Optimized:</strong> Clean, machine-readable format for contact info and headers.</li> <li> <strong>Project-First:</strong> Prioritizes impact and "What you built."</li> </ul> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flamppa6q8a4zcyo216d9.png" class="article-body-image-wrapper"><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.amazonaws.com%2Fuploads%2Farticles%2Flamppa6q8a4zcyo216d9.png" alt="McDowell CV Preview" width="800" height="1035"></a></p> <blockquote> <p>💡 <strong>Ready to use this?</strong><br> You can grab the <strong>editable LaTeX source and Overleaf link</strong> for this specific template over on my blog:<br> 👉 <strong><a href="https://thepracticaldev.blogspot.com/2026/05/top-sde-resume-templates-ats-friendly.html#mcdowell" rel="noopener noreferrer">Download the McDowell Template Here</a></strong></p> </blockquote> <h2> 2. Engineering Standard (Word &amp; LaTeX) </h2> <p>For those who prefer a single-column layout focused on pure readability. These are often cited as the gold standard in technical forums like r/EngineeringResumes.</p> <ul> <li> <strong>Engineering Resume Standard:</strong> The minimalist "safe" choice.</li> <li> <strong>Recruiter-Focused:</strong> Strips away all formatting noise to focus on tech stack and experience.</li> <li> <strong>Modern Deedy &amp; PlushCV:</strong> For those who want a slightly more modern aesthetic without losing ATS compatibility.</li> </ul> <h2> 📂 Download the Templates (Docx &amp; LaTeX) </h2> <p>To keep the formatting 100% intact and provide the most up-to-date versions, I have hosted the <strong>direct download links (Microsoft Word, Google Docs, and Overleaf/LaTeX)</strong> on my blog.</p> <h3> 👉 <a href="https://thepracticaldev.blogspot.com/2026/05/top-sde-resume-templates-ats-friendly.html" rel="noopener noreferrer">Click here to view all templates and download files</a> </h3> <h3> Quick Tips for SDE Resumes: </h3> <ul> <li> <strong>Keep it to one page:</strong> Unless you have 10+ years of experience.</li> <li> <strong>Focus on outcomes:</strong> Use the "Accomplished [X] as measured by [Y], by doing [Z]" formula.</li> <li> <strong>Tailor your stack:</strong> Ensure the technologies mentioned in the job description appear clearly in your Skills section.</li> </ul> <p><em>Originally published at <a href="https://thepracticaldev.blogspot.com/2026/05/top-sde-resume-templates-ats-friendly.html" rel="noopener noreferrer">The Practical Dev</a></em></p> atsfriendlycv faangresume sderesumetemplates softwareengineering