What Is Low-Level Design (LLD)?
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.
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What Is the First Thing You Should Do in a System Design Interview?
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.
Why Is Scoping the Problem So Important in System Design?
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.
What Is a Bottleneck in System Design?
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.
Why Use Asynchronous Processing in System Design?
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.
What Is Domain-Driven Design (DDD)?
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.
What Is a Bounded Context?
A calm, thorough guide to the single most important idea in Domain-Driven Design: the “trunk” analogy showing how the same word means different things in different rooms, what a bounded context really is (a modelling boundary from Eric Evans 2003 book paired with a ubiquitous language), why the “one giant…
Why Do Architects Care About Design Patterns at All?
A calm, thorough guide to why experienced architects lean on design patterns so heavily: the two-children-building-block-towers and bread-recipe analogies, the surprising origin of pattern thinking in Christopher Alexander 1977 building architecture book and the 1994 Gang of Four adoption, what a design pattern really is (a reusable shape of a…
What Is Redundancy in System Design?
A calm, thorough guide to redundancy in system design: the bicycle-with-two-brakes and circus-safety-net analogies, what redundancy really is (deliberate duplication of independent components), why it matters (true cost of downtime, failure as certainty not possibility, and the quiet value of predictability), how to find and eliminate single points of failure…
Achieving Loose Coupling Through Design Patterns
A calm, thorough guide to how design patterns achieve loose coupling: the paper-cups-and-string vs. walkie-talkies analogy, what coupling really is (and the connascence vocabulary for talking about it precisely), four reasons loose coupling matters (change stays local, testing becomes possible, teams work independently, failures stay contained), the spectrum of coupling…