System Design Course: Complete Foundations for Interviews

By Mukul Raina

Created by Mukul Raina (Senior Software Engineer & Tech Lead at Microsoft, Oxford MSc), this comprehensive course provides a complete foundation for system design interviews. It systematically covers everything from internet fundamentals (DNS, TCP/UDP, HTTP, TLS) and server architectures (monolith vs microservices) to databases (SQL vs NoSQL, indexing, sharding, replication), scaling strategies (vertical/horizontal, capacity estimation), caching (Redis, eviction policies), load balancing (algorithms, Layer 4 vs Layer 7), and CDNs—all backed by real-world case studies like Instagram, Netflix, and WhatsApp to prepare you for FAANG-level technical screens.