Facebook Messenger System Design

Prepare to dive into a System Design mock interview modeled after real interview rounds at FAANG+ companies and other leading tech firms. In this session, you’ll design the architecture of Facebook Messenger, focusing on scalability, reliability, and real-time communication. The interview simulates a real System Design round, guiding you through defining requirements, architecting solutions, and discussing trade-offs for a large-scale, low-latency messaging system that supports group chats, media sharing, and instant notifications. Expect a mix of conceptual reasoning, technical deep dives, and scenario-based challenges.

What You'll Practice:

• Structuring and communicating end-to-end messaging architectures clearly.
• Designing scalable, fault-tolerant, and low-latency systems for real-time communication.
• Applying System Design principles to message delivery, synchronization, and data storage.
• Creating clear, well-organized design diagrams to illustrate core components and data flow.
• Evaluating and defending trade-offs in consistency, availability, and performance under interview pressure.

By the end of this System Design Mock Interview, you’ll be prepared to tackle real-world messaging system design interviews with confidence, demonstrating your ability to think architecturally and communicate complex ideas effectively.