- Backend LLD
Trip State Machine Design for Ride-Sharing Platform
Comprehensive low-level design for trip state management system with event-driven architecture and fault tolerance considerations.
- Backend LLD
Driver Matching System Low-Level Design
Comprehensive LLD for a real-time driver matching system that efficiently pairs drivers with passengers based on location, availability, and preferences.
- Backend LLD
Follow System Design - Scalable Social Media Following Feature
Comprehensive low-level design for a scalable follow system with real-time updates, consistency models, and efficient data structures for social media platforms.
- Backend LLD
News Feed System Design - Scalable Content Aggregation Platform
Comprehensive low-level design for a scalable news feed system handling real-time content aggregation, user preferences, and personalized recommendations.
- Backend LLD
Blocking System Design: Scalable Rate Limiting and Throttling Architecture
Comprehensive low-level design for implementing efficient blocking systems with rate limiting, throttling, and distributed coordination patterns.
- Backend LLD
Messaging System Design: Scalable Real-Time Communication Architecture
Comprehensive low-level design for a scalable messaging system supporting real-time communication with persistence, delivery guarantees, and horizontal scalability.
- Backend LLD
Notification System Low-Level Design
Comprehensive backend LLD for scalable notification delivery system with real-time updates and multi-channel support.
- Backend LLD
Inventory Reservation System Design
Comprehensive low-level design for a scalable inventory reservation system with distributed locking and eventual consistency patterns.
- Backend LLD
Pricing Engine Design and Implementation
Comprehensive low-level design for a scalable pricing engine system handling dynamic pricing rules, discounts, and real-time calculation.
- Backend LLD
Coupon/Discount Engine Design: Scalable Backend System for Dynamic Promotions
Comprehensive low-level design for a scalable coupon and discount engine supporting complex promotion rules, real-time validation, and high-throughput processing.
- Backend LLD
Order State Machine Design Patterns and Implementation
Comprehensive low-level design for a robust order state machine system with concurrency handling, persistence, and event-driven architecture.
- Backend LLD
Payment Gateway Integration Design: Secure Transaction Processing System
Comprehensive low-level design for a scalable payment gateway integration system with fraud detection and multi-provider support.
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.