Easy Learn
A plain-language, complete guide to back-of-the-envelope estimation: what it really is, where the name comes from, why interviewers care, the foundational numbers to keep in your back pocket, the common types of estimation, a repeatable six-step process, two fully worked examples (a photo-sharing app and a URL shortener), handy rules…
A plain-language, complete guide to idempotency in distributed systems: what it really is, where the idea comes from, why retries happen at all, how it maps onto HTTP methods and delivery guarantees, how idempotency keys work step by step, other complementary techniques, two fully worked examples (a coffee-shop payment and…
A plain-language, complete guide to microservices architecture: what it is, where the idea came from, how it compares to a monolith, the anatomy of a single microservice, how services communicate, how data is managed across many services, the supporting cast of gateways and meshes, security considerations, a fully worked bookstore…
A plain-language, complete guide to vertical partitioning: what it is, how it differs from horizontal partitioning, why it matters, the building blocks, its relationship to normalisation, two fully worked SQL examples, how the same idea appears in NoSQL, real-world uses, honest advantages and disadvantages, how to choose where to split,…
A friendly, complete guide to High-Level Design (HLD): what it is, why every serious project needs one, how it differs from LLD and requirements, the building blocks, quality goals, architecture styles, a worked food-delivery example, pitfalls to avoid, tools of the trade, HLD in interviews, and a reusable template.
A plain-English guide to High-Level Design (HLD): what belongs on the big-picture map, how it differs from LLD and requirements, common architecture styles, a worked food-delivery example, pitfalls to avoid, and a reusable template.
A plain-English guide to Low-Level Design: classes, relationships, SOLID principles, design patterns, UML, a worked parking-lot example, and how good LLD turns a big-picture plan into code a team can actually build.
A plain-English guide to the very first move in a system design interview: ask clarifying questions. Includes a five-phase framework, a worked URL shortener example, common mistakes to avoid, and how to practise before the real thing.
A plain-English guide to scoping in system design: what belongs inside the frame, what stays outside, and how the earliest decision on any project quietly shapes every technical choice that follows.
A plain-English guide to bottlenecks in system design: the six kinds, how to spot the warning signs, how architects hunt them down, and the proven strategies for fixing them without shifting the problem elsewhere.