Codemia

Master System Design Interviews Through Active Practice Passively learning system design does not work. Now you can practice system design problems like the way you practice data structure and algorithms on Leetcode.Get Started NowSystem DesignObject Oriented DesignDSAMock InterviewCourses✨ EvaluateView FeedbackWelcome to the interview.Can you design a file-sharing service like Dropbox?So what are the requirements?Sure, let's begin with a few requirements:• Upload files from any device• Auto-sync between devices• Store files up to 1GB• Share via public linksYour DesignFunctional Requirements• Upload files up to 1GB• Sync across devices• Share via public linksScale Estimates• 500M users, 100M DAU• 10 files/user/day• 5 PB storageHigh-Level Design• CDN for static assets• Chunked uploads• Event-driven syncEverything You NeedFour Ways to Ace Your InterviewFrom system design to algorithms, we've got you covered with interactive practice and real-time feedback🏗️System DesignDesign scalable systems like the pros120+ ProblemsInteractive WhiteboardAI-Powered EvaluationHigh Score SolutionsScale Estimation ToolsCommunity FeedbackStart Designing🧮DS & AlgorithmsMaster coding with visual learning200+ ProblemsStep-by-Step Visualizations8 Programming LanguagesReal-time Test CasesComplexity AnalysisHints & SolutionsStart Coding📐Object-Oriented DesignDesign elegant class structures20+ ProblemsUML Class DiagramsDesign Pattern PracticeSOLID PrinciplesAI Design ReviewReal-world ScenariosStart DesigningNew🎯Mock InterviewPractice with real engineersLive SessionsPeer Matching SystemHD Video CallsCollaborative WhiteboardRole SwitchingInstant Peer FeedbackFind a PartnerReady to ace your next interview?Get Started FreeA Better Way to Prepare for System Design Interviews.Save months of study, better retention and deeper understanding! See Below.RecommendedCodemiaDesign GurusSystem Design InterviewSDISystem Design Courses120+ Practice ProblemsUNIQUE200+ DSA Problems with VisualizationsUNIQUE80+ High Score Solutions20+ Object-oriented Design ProblemsMock Interviews with PeersNEWAI-Powered Real-time FeedbackNEWInteractive LearningUNIQUEIterative Feedback and EvaluationUNIQUEStructural Breakdown of SD ProblemsCommunity FeedbackUNIQUEView Other SubmissionsUNIQUETotal Features12/12100% Coverage4/1233% Coverage3/1225% CoverageTrusted by engineers at top tech companiesSuccess StoriesLoved by Engineers WorldwideJoin thousands of engineers who transformed their interview skillsSystem Design★★★★★“Codemia makes studying system design so engaging! I've learned more in weeks than months of traditional study.”MPMaho P.Senior SWE at MicrosoftDSA★★★★★“The DSA visualizations are incredible! Finally understand algorithms step by step. Passed my coding interviews!”SLSarah L.Software Engineer at MetaSystem Design★★★★★“Game-changer! The AI-guided practice sessions boosted my confidence. Aced my system design interviews!”DZDavid Z.Senior SWE at LinkedInMock Interview★★★★★“Mock interview feature is amazing! Practiced with a Google engineer, got real feedback. Dream offer in 2 weeks!”AKAlex K.SWE II at AmazonOOD★★★★★“The OOD problems helped me understand design patterns deeply. Perfect prep for mid-level interviews.”JWJennifer W.Software Engineer at StripeSystem Design★★★★★“Best investment for interview prep. The interactive whiteboard feels just like real interviews. Highly recommend!”MTMichael T.Senior SWE at NetflixSystem Design★★★★★“Codemia makes studying system design so engaging! I've learned more in weeks than months of traditional study.”MPMaho P.Senior SWE at MicrosoftDSA★★★★★“The DSA visualizations are incredible! Finally understand algorithms step by step. Passed my coding interviews!”SLSarah L.Software Engineer at MetaSystem Design★★★★★“Game-changer! The AI-guided practice sessions boosted my confidence. Aced my system design interviews!”DZDavid Z.Senior SWE at LinkedInMock Interview★★★★★“Mock interview feature is amazing! Practiced with a Google engineer, got real feedback. Dream offer in 2 weeks!”AKAlex K.SWE II at AmazonOOD★★★★★“The OOD problems helped me understand design patterns deeply. Perfect prep for mid-level interviews.”JWJennifer W.Software Engineer at StripeSystem Design★★★★★“Best investment for interview prep. The interactive whiteboard feels just like real interviews. Highly recommend!”MTMichael T.Senior SWE at NetflixSystem Design★★★★★“Was struggling with system design until Codemia. Detailed solutions and instant AI feedback are invaluable!”JZJayson Z.Software Engineer at GoogleDSA★★★★★“The step-by-step visualizations made complex algorithms click. Went from struggling to confident in weeks!”EREmma R.Frontend Engineer at AirbnbOOD★★★★★“Perfect for aspiring engineers! AI feedback helped identify my weak points. Turned weaknesses into strengths!”PKPrasanna K.New Grad at CS GraduateSystem Design★★★★★“Used ChatGPT before but this is way better. Integrated platform keeps me in flow while studying. Love it!”FMFrancisco M.SDE at AmazonMock Interview★★★★★“The peer matching for mock interviews is genius! Practiced with engineers worldwide. Got 3 offers in a month!”RHRyan H.Backend Engineer at UberSystem Design★★★★★“Needed to level up my system design skills. Codemia's AI guidance has been a lifesaver. Highly recommend!”NJNeelan J.Senior Dev at MicrosoftSystem Design★★★★★“Was struggling with system design until Codemia. Detailed solutions and instant AI feedback are invaluable!”JZJayson Z.Software Engineer at GoogleDSA★★★★★“The step-by-step visualizations made complex algorithms click. Went from struggling to confident in weeks!”EREmma R.Frontend Engineer at AirbnbOOD★★★★★“Perfect for aspiring engineers! AI feedback helped identify my weak points. Turned weaknesses into strengths!”PKPrasanna K.New Grad at CS GraduateSystem Design★★★★★“Used ChatGPT before but this is way better. Integrated platform keeps me in flow while studying. Love it!”FMFrancisco M.SDE at AmazonMock Interview★★★★★“The peer matching for mock interviews is genius! Practiced with engineers worldwide. Got 3 offers in a month!”RHRyan H.Backend Engineer at UberSystem Design★★★★★“Needed to level up my system design skills. Codemia's AI guidance has been a lifesaver. Highly recommend!”NJNeelan J.Senior Dev at MicrosoftStart now!Start studying today! Get your skills to the next level and differentiate yourself from the rest of the competition.Unlock Full AccessFAQEverything you need to knowCan't find what you're looking for? Reach out to our support team.✨What makes Codemia different from other platforms?Codemia offers a unique combination of interactive practice, AI-powered feedback, and peer mock interviews. Unlike passive learning platforms, we focus on active practice with real-time evaluation - like having a senior engineer review your work instantly.📚What topics does Codemia cover?We cover four main areas: System Design (40+ problems), Data Structures & Algorithms (200+ problems with visualizations), Object-Oriented Design (20+ problems), and Mock Interviews with real engineers. All designed to prepare you for FAANG-level interviews.🎯Is Codemia suitable for beginners?Absolutely! Each topic has problems ranging from beginner to advanced. Our step-by-step visualizations for DSA and structured approach for system design make complex concepts accessible. Many users start with zero experience and land offers within months.🎥How do Mock Interviews work?Book a time slot and we'll match you with another engineer at your level. You'll take turns as interviewer and interviewee, practicing real interview scenarios with video, collaborative whiteboard, and code editor. Get immediate peer feedback after each session.🆓Can I try before I subscribe?Yes! You get free access to selected problems in each category. Explore our interactive whiteboard, try DSA visualizations, and experience AI feedback. Upgrade to Premium for unlimited access to all problems, solutions, and mock interviews.💬How do I get support if I have questions?We're here to help! Reach us at support@codemia.io or through our Discord community where you can connect with other learners and get tips from engineers who've successfully used Codemia to land their dream jobs.Codemia© 2026 CodemiaResourcesBlogSystem DesignLegalTerms & ConditionsPrivacy PolicyContactSocialTwitterLinkedInAll Rights Reserved. --- Start learning today!Invest in your future!Codemia© 2026 CodemiaResourcesBlogSystem DesignLegalTerms & ConditionsPrivacy PolicyContactSocialTwitterLinkedInAll Rights Reserved. --- System Design ProblemsRoadmapMaster system design interviews with hands-on practice. Design scalable systems, understand trade-offs, and build real-world architecture skills.CategoryStatusCompany Tags --- Object Oriented Design ProblemsPractice object-oriented design principles with real-world scenarios. Learn to design classes, relationships, and apply SOLID principles.CategoryStatusCompany Tags