System Design Interview: Design a Multi-Tenant SaaS Platform
What Is a Multi-Tenant SaaS Platform? A multi-tenant SaaS platform serves multiple customers (tenants) from a single shared infrastructure. Each […]
System Design
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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
System Design Interview: Design an Inventory Management System (Amazon/Shopify)
What Is an Inventory Management System? An inventory management system tracks stock levels across warehouses, prevents overselling, coordinates replenishment, and
System Design
System Design Interview: Design a Real-Time Collaborative Whiteboard (Miro/Figma)
What Is a Real-Time Collaborative Whiteboard? A collaborative whiteboard (like Miro, FigJam, or Excalidraw) lets multiple users simultaneously draw, add
System Design
System Design Interview: Design a Healthcare Appointment Booking System
What Is a Healthcare Appointment Booking System? A healthcare appointment booking system allows patients to schedule, reschedule, and cancel appointments
System Design
System Design Interview: Design a Distributed Lock and Leader Election System
What Is a Distributed Lock? A distributed lock ensures that only one node in a cluster executes a critical section
System Design
System Design Interview: Design a Loyalty and Rewards Points System
What Is a Loyalty and Rewards System? A loyalty program tracks user activity and awards points redeemable for discounts or
System Design
System Design Interview: Design an Ad Click Aggregation System (Google/Meta Ads)
What Is an Ad Click Aggregation System? Ad platforms (Google Ads, Meta Ads, Amazon Advertising) must aggregate billions of ad
System Design
System Design Interview: Design a Typeahead / Search Suggestion System
What Is a Typeahead / Search Suggestion System? A typeahead (also called autocomplete or search suggestion) system predicts what a
System Design
System Design Interview: Design a Distributed Message Queue (SQS / RabbitMQ)
What Is a Distributed Message Queue? A message queue decouples producers (services that generate work) from consumers (services that process
System Design
System Design Interview: Design a Live Sports Score System
What Is a Live Sports Score System? A live sports score system delivers real-time score updates to millions of concurrent
System Design
System Design Interview: Design a Cloud File Storage System (Dropbox/Google Drive)
What Is a Cloud File Storage System? A cloud file storage system lets users upload, sync, and share files across
System Design
System Design Interview: Design an Online Auction System (eBay)
What Is an Online Auction System? An online auction system allows sellers to list items and buyers to place competitive
System Design
System Design Interview: Design a Web Crawler and Search Indexer
What Is a Web Crawler and Search Indexer? A web crawler systematically downloads web pages. A search indexer processes those
System Design
System Design Interview: Design a Multi-Region Database System
Why Multi-Region Databases? A single-region database has two critical weaknesses: latency (users in Europe querying a US database experience 150ms+
System Design
System Design Interview: Design a Streaming Data Pipeline (Kafka + Flink)
What Is a Streaming Data Pipeline? A streaming data pipeline continuously ingests, processes, and routes events in real time —