hello.frontend

Frontend System Design

High-level architectural patterns for modern frontend applications. From micro-frontends to state machine orchestration at scale.

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Architecture Guide 2026Guide
Interview Cheat SheetChecklist
Design a News Feed UI
Medium
Design a Component Library / Design System
Hard
Design Travel Booking Platform (Expedia/Booking.com)PRO
Hard
Design Perplexity (RAG Search with Citations)PRONEWAI
Hard
Design a Self-healing React ComponentNEWAIGUIDED ANSWER
Hard
Design a File Upload UI
Medium
Design an E-commerce Cart + Product PagePRO
Medium
Design a Calendar / SchedulerPRONEW
Hard
Design a Rich Text EditorPRONEW
Hard
Design an Email Client UIPRONEW
Hard
Design a File Explorer / Google Drive UIPRONEW
Hard
Design an Autocomplete / Search UI
Medium
Design a Video Player (YouTube / Netflix)
Hard
Design a Data Table (Sort / Filter / Virtualize)
Medium
Design an Image Carousel / Photo Gallery
Medium
Design an Analytics DashboardPRONEW
Hard
Design a Drawing Tool like FigmaPRONEW
Hard
Design a Spreadsheet UI like Google SheetsPRONEW
Hard
Design a Real-time Chat UI
Hard
Design a Collaborative Editor (Google Docs)
Hard
Design ChatGPT (Streaming Chat with Branching & Share-link)NEWAI
Hard
Design a Notification CenterPRONEW
Hard
Design a Kanban Project BoardPRONEW
Hard