Low Level Design: Email Template Engine
12 min read Overview An email template engine is a system for defining, versioning, rendering, and testing email content at scale. It must […] Read article
System Design
← Tech Interview
System Design
Learn to design scalable, reliable systems that handle millions of users. System design interviews test your ability to architect real-world applications, considering tradeoffs, scalability, and best practices.
Core Topics:
Scalability: Load balancing, horizontal vs vertical scaling
Storage: Databases (SQL vs NoSQL), caching (Redis, Memcached)
Reliability: Replication, failover, disaster recovery
Performance: CDNs, caching strategies, database indexing
Common Design Questions:
Design URL shortener (bit.ly)
Design rate limiter
Design Twitter/Instagram feed
Design messaging system (WhatsApp)
Design file storage (Dropbox)
Interview Level: Senior engineers (L5+) at FAANG companies. Requires 3-5+ years experience to tackle effectively.
Preparation: Study system design patterns, understand distributed systems fundamentals, and practice mock interviews.
System Design
Low Level Design: Container Registry
10 min read What Is a Container Registry? A container registry is a storage and distribution system for container images. It stores named, Read article
System Design
Low Level Design: Flight Search Service
4 min read What Is a Flight Search Service? A flight search service aggregates schedules and prices from airlines or GDS providers, lets Read article
System Design
Low Level Design: Travel Itinerary Service
5 min read What Is a Travel Itinerary Service? A travel itinerary service lets users plan and manage multi-component trips: flights, hotels, car Read article
System Design
Low Level Design: Driver Matching Service
4 min read What Is a Driver Matching Service? A driver matching service is the real-time system responsible for pairing a rider’s trip Read article
System Design
Low Level Design: Supply-Demand Balancing Service
4 min read What Is a Supply-Demand Balancing Service? A supply-demand balancing service continuously monitors the ratio of available drivers (supply) to outstanding Read article
System Design
Low Level Design: Surge Pricing Service
5 min read What Is a Surge Pricing Service? Surge pricing (dynamic pricing) automatically adjusts ride fares based on real-time supply and demand Read article
System Design
Low Level Design: Photo Sharing Service
4 min read What Is a Photo Sharing Service? A photo sharing service lets users upload, organize, and share photographs with fine-grained access Read article
System Design
Low Level Design: Media Storage Service
4 min read What Is a Media Storage Service? A media storage service is a backend system responsible for ingesting, persisting, organizing, and Read article
System Design
Low Level Design: Referral Service
4 min read What Is a Referral Service? A Referral Service incentivizes existing users to invite new users by rewarding both parties when Read article
System Design
Low Level Design: Online Status Service
5 min read What Is an Online Status Service? An online status service exposes a queryable view of whether users are currently active, Read article
System Design
Low Level Design: Typing Indicators Service
4 min read What Is a Typing Indicators Service? A typing indicators service detects when a user is actively composing a message and Read article
System Design
Low Level Design: Code Review Service
4 min read What Is a Code Review Service? A code review service enables developers to submit pull requests, receive automated static analysis, Read article
System Design
Low Level Design: CI/CD Pipeline
5 min read What Is a CI/CD Pipeline? A CI/CD pipeline automates the path from a code commit to a running production deployment. Read article
System Design
Low Level Design: Distributed Build System
5 min read What Is a Distributed Build System? A distributed build system parallelizes the compilation and linking of large codebases across a Read article