- Backend LLD
Checkout System Low-Level Design Implementation
Comprehensive backend LLD for a scalable e-commerce checkout system with payment processing and inventory management.
- Backend LLD
Faceted Search System Design: Scalable Metadata-Based Filtering
Comprehensive low-level design for building a scalable faceted search system with real-time filtering, aggregation, and performance optimization.
- Backend LLD
Query Parser Design and Implementation
Comprehensive low-level design for a robust query parsing system supporting SQL-like syntax with extensible grammar and efficient tokenization.
- Backend LLD
Filtering Engine Design: Scalable Backend Architecture for Real-Time Data Processing
Comprehensive low-level design for a scalable filtering engine that processes real-time data streams with configurable rules and efficient query execution.
- Backend LLD
Ranking Engine Design: Scalable Content Ranking System
Comprehensive low-level design for a scalable ranking engine that processes millions of content items with real-time scoring and sorting capabilities.
- Backend LLD
Recommendation Engine Interface Design
Comprehensive low-level design for a scalable recommendation engine interface with real-time processing and personalized user experiences.
- Backend LLD
Spell Checker System Design
Comprehensive low-level design for a scalable spell checking system with autocomplete and fuzzy matching capabilities.
- Backend LLD
Auto-complete System Design: Building a Scalable Search Suggestion Engine
Comprehensive low-level design for a scalable auto-complete system with trie-based indexing, caching strategies, and real-time suggestion generation.
- Backend LLD
Search Service Low-Level Design for Scalable Text Retrieval
Comprehensive LLD for building a high-performance search service with indexing, query processing, and distributed architecture patterns.
- Backend LLD
CDN Cache Invalidation System Design
Comprehensive low-level design for a scalable CDN cache invalidation system with real-time invalidation and cache consistency strategies.
- Backend LLD
Content Moderation Pipeline Design
Comprehensive low-level design for a scalable content moderation system with real-time filtering, machine learning integration, and multi-tiered review workflows.
- Backend LLD
Video Processing Workflow Design
Comprehensive low-level design for a scalable video processing system handling ingestion, transcoding, and delivery across multiple formats and resolutions.
Backend Low-Level Design (LLD) — Study Guide
A curated, structured catalog of backend low-level / object-oriented design questions for study and practice. Use it to plan study sessions, track coverage, and rehearse with a repeatable approach.