Full system design prompts. Draw architecture, define APIs, model data, explain tradeoffs.
16 SD challenges in this view require Pro
Each Pro challenge includes diagrams, API design, tradeoffs, and an expert solution. Upgrade to unlock all 31 challenges.
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26 challenges found
File upload, preview, drag-and-drop processing, and local file system access.
Concepts (0/1 done)
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Real-time multi-user drawing surface using Canvas API with sync and undo.
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Unlock with Pro →Real-time messaging UI with typing indicators, read receipts, and optimistic sends.
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Unlock with Pro →Real-time multi-user text editor with live cursors, conflict resolution, and offline support.
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Unlock with Pro →Keep cart, auth state, and UI in sync across multiple browser tabs.
Concepts (0/1 done)
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Widget-based dashboard where users drag, resize, and reorder components with layout persistence.
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Unlock with Pro →Client-side encryption of notes using Web Crypto API so the server never sees plaintext.
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Unlock with Pro →Build a robust HTTP client with caching, deduplication, and retry using the Fetch API.
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Unlock with Pro →Pan-and-zoom infinite canvas with virtualized object rendering, selection, and real-time collaboration.
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Unlock with Pro →Reusable drag-and-drop file upload component with chunked uploads and retry.
Store finder with live GPS position, map rendering, and distance sorting.
Concepts (0/2 done)
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Local-first notes app using IndexedDB as the primary store with cloud backup.
Concepts (0/1 done)
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Virtualized feed with lazy loading using Intersection Observer API.
Concepts (0/2 done)
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Real-time driver position tracking on a map with smooth interpolation and state management.
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Unlock with Pro →Step-based checkout with form validation, payment integration, and resilient state management.
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Unlock with Pro →Infinite-scroll feed with real-time post updates, likes, and virtualized rendering.
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Unlock with Pro →In-app notification bell, real-time toast queue, badge counts, and persistent notification history.
Concepts (0/1 done)
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Architecture for a PWA that works offline using Service Workers and caching strategies.
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Unlock with Pro →Masonry or fixed-grid image feed with virtualization, lazy loading, and a lightbox viewer.
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Frontend architecture for a live SaaS metrics dashboard.
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Unlock with Pro →Accessible autocomplete with debouncing, result caching, and keyboard navigation.
Persistent shopping cart with optimistic updates, offline support, and cross-tab sync.
Concepts (0/1 done)
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Adaptive streaming video player with buffer states, quality selection, and accessibility.
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Unlock with Pro →Audio playback pipeline with waveform visualization using the Web Audio API.
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Unlock with Pro →Offload formula evaluation and large dataset processing to Web Workers.
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Unlock with Pro →Peer-to-peer video/audio calling UI using WebRTC, signaling server, and TURN.
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