System Design

The beginner on-ramp nobody else has: how computers, networks, APIs, load balancers, caches and queues actually work — grounded in hardware, ending in back-of-the-envelope mastery.

Databases inside-out at DDIA altitude, made interactive: every database family, storage engines, replication and consistency, scaling reads and writes, transactions, storage systems, and the specialized indexes behind geo, search and counting.

The L5/L6 differentiator: failure models, time and clocks, Raft and coordination, CRDTs, overload control, SLOs and error budgets, disaster recovery and multi-region — closed by real-outage case studies.

Architect at scale, then operate and evolve: architecture styles, microservices patterns, Kubernetes and compute decisions, big data and streaming, deployments and migrations, observability, security and cloud cost engineering.

Convert knowledge into offers: the delivery method, twelve problem patterns bridged to real practice problems, technology deep-dives, when-X-vs-Y decision rubrics, and L4/L5/L6 level calibration on one running system.

A curated collection of real-world system design questions frequently asked in interviews. Designed to help you practice problem framing, requirement analysis, architectural decisions, and scalability considerations.