Master frontend system design with real-world case studies and architectural patterns.
15 of 15 case studies
Design an autocomplete UI component that allows users to enter a search term into a text box, a list of search results appear in a popup and the user can select a result.
Build a scalable social media feed like Facebook or Twitter that handles real-time updates, pagination, and user interactions efficiently.
Design the Pinterest homepage, with a focus on the masonry layout. A layout design where elements are placed within columns but can have varying heights, resulting in a more organic and visually interesting arrangement.
Design an e-commerce website that allows users to browse products and purchase them. Support product listing pages, product details pages, shopping cart, and checkout flow. Must handle performance, internationalization, and accessibility requirements.
Design a media-rich infinite-scrolling photo sharing application with image uploads, filters, stories, social interactions, and real-time updates. Handle millions of photos, optimize for performance and mobile, and support features like likes, comments, and temporary 24-hour stories.
Design a real-time messaging application similar to Facebook Messenger or Slack. Support instant message delivery, presence indicators, read receipts, typing indicators, file sharing, and group chats. Handle millions of concurrent connections with low-latency message propagation.
Design a poll widget that can be easily embedded on websites, such as articles and blogs to allow website viewers to vote on options.
Design an extensible rich text editor component that allows users to create and edit text with various formatting options. A WYSIWYG editor supporting block and inline formatting.
Design a travel booking website similar to Airbnb or Booking.com. Support searching for accommodations, viewing listings with maps, filtering by amenities, and making reservations. Handle international users, SEO optimization, and mobile responsiveness.
Design a video streaming application similar to Netflix or YouTube. Support browsing video recommendations, adaptive bitrate streaming, custom video player with playback controls, and support for multiple subtitle/caption tracks. Handle millions of concurrent users with smooth playback.
Design a collaborative spreadsheet application like Google Sheets or Microsoft Excel Online. Support real-time cell editing, formula evaluation, data validation, sorting/filtering, and team collaboration. This requires understanding of distributed state management, operational transformation, formula parsing, and real-time synchronization.
Design a collaborative diagramming tool like Lucidchart, Draw.io, or Miro. Support real-time collaboration, shape manipulation, canvas rendering, undo/redo, and team sharing. This requires mastery of canvas rendering, state management for complex diagrams, WebSocket synchronization, and performance optimization for large canvases.
Design a music streaming application like Spotify, Apple Music, or Pandora. Support audio playback, playlist management, search, recommendations, offline caching, and real-time queue management. This requires understanding of audio codecs, streaming protocols, performance optimization, and recommendation algorithms.
Design a video conferencing application like Zoom, Google Meet, or Skype. Support real-time video/audio transmission, screen sharing, recording, chat, and meetings with multiple participants. This requires understanding of WebRTC, media streaming, network optimization, and low-latency communication.
Design a collaborative diagram tool. Support real-time editing, shape manipulation, canvas rendering, and team sharing.