System Design Senior Level

1. Load Balancing & Reverse Proxy

Load Balancer & Reverse Proxy (L4/L7, Consistent Hashing, Health Checks)

2. Messaging System (Chat Architecture)

Designing A Messaging System (WhatsApp / Zalo / Messenger)

3. URL Shortener System

Designing A Url Shortener (Bit.ly / TinyURL)

4. Rate Limiting System

Design A Rate Limiter For API gateway (Token bucket / Sliding Window / Redis Based)

5. Central Logging & Tracing

Designing A Logging & Distributed Tracing Platform (ELK / Jaeger / Tempo / DataDog Style)

6. Distributed Cache System

Designing A Distributed Cache System (Redis / Memcached / Aerospace)

7. Payment/OTP Gateway

Designing A Payment & OTP Verification Gateway (Idempotency + Fraud Detection)

8. Distributed Job Scheduler

Designing A Distributed Job Scheduler (Cron Cluster / Task Orchestrator)

9. Flash Sale/Ticketing System

Design A Flash Sale / Ticketing System (Prevent Overselling)

10. News Feed Ranking System

Designing A Social News Feed System (Push vs Pull Architecture)

11. SQL vs NoSQL Scalability

SQL vs NoSQL Scalability Trade-offs in System Design

12. Sharding & Partitioning

Sharding vs Partitioning

13. Eventual Consistency Models

Eventual Consistency: Deep Dive & Real-World System Design Use Cases

14. File Upload & CDN Pipeline

Designing A Content Delivery Network (CDN) – Caching + Edge + Routing

15. Cache Invalidation Strategies

Cache Invalidation Strategies & Consistency Models

16. CQRS & Event Sourcing

CQRS & Event Sourcing Architecture

17. Saga vs 2PC Distributed Transaction

SAGA Pattern vs Two-Phase Commit (2PC) In Distributed Transactions

18. Real-time Notification System

Designing A Real-Time Notification System (WebSocket / SSE / Push)

19. Search Engine Design

Designing A Search System

20. CDN Architecture

Designing A Content Delivery Network (CDN) – Caching + Edge + Routing

21. Distributed Rate Limiter

Distributed Rate Limiter (Token Bucket, Sliding Window, Clustered)

22. Distributed File Storage System

Designing A Distributed File Storage System (Dropbox / Google Drive / S3-like)

23. MapReduce & Big Data

Designing A MapReduce System (Hadoop / Spark)

24. Distributed SQL Database (Spanner)

Designing Distributed SQL Database (Google Spanner / Yugabyte / CockroachDB)

25. Stream Processing (Kafka/Flink)

Designing A Stream Processing System (Kafka Streams / Flink / Spark Streaming)

26. API Gateway Design & Service Mesh

API Gateway & Service Mesh (Envoy / Istio / Linkerd)

27. Distributed Locking System

Designing A Distributed Locking System (Redis • Zookeeper • Redlock • DB-Based Locks)

28. Distributed Task Queue

Designing A Distributed Task Queue (Celery / Sidekiq / SQS Worker / Kafka Worker)

30. System Design Principles Recap

System Design Principles Recap