Gaurav Singh

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.

A plain-English guide to asynchronous processing in system design: queues, pub/sub, event streams, retries, dead letter queues, idempotency, eventual consistency, and how the best teams decide what to wait for.

A plain-English tour of Domain-Driven Design: the ubiquitous language, bounded contexts, entities and value objects, aggregates, events, and how the discipline still shapes software teams today.