Architecture & System Design
Build things that survive success.
Separation of concerns, coupling and cohesion, the design patterns that matter, SOLID, scaling, queues, caching, and the whiteboard skill of designing a whole system. How software stays maintainable as it grows.
Lessons
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Separation of Concerns
Why everything-in-one-file collapses, and how layers keep software sane.
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Coupling & Cohesion
The two forces behind every good (and bad) design decision.
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Design Patterns That Matter
The handful of design patterns you'll actually use — and when not to.
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SOLID for Builders
SOLID principles explained for people who ship, not people who memorize.
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Managing State & Data Flow
Manage state and data flow so complexity doesn't strangle your app.
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Designing for Change
The only constant is change — design so tomorrow's edit isn't a rewrite.
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Monolith vs Services
Monolith vs microservices — and why 'micro' is usually the wrong call for you.
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Designing a System (the Whiteboard Skill)
The whiteboard skill: take 'design Twitter' from blank page to real architecture.
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Scaling Fundamentals
Vertical, horizontal, load balancing, statelessness — how systems handle growth.
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Queues & Event-Driven Architecture
Decouple with messages: queues and event-driven architecture for resilient systems.
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Caching Layers & CDNs
Make big things fast with caching layers and CDNs — at every level of the stack.
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Idempotency, Retries & Designing for Failure
Design for when — not if — things fail: idempotency, retries, graceful degradation.
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Capstone: Design a Complete System
Design a complete system on paper: requirements, architecture, scaling, and failure modes.
🏛️ Build It Right, Or Don't Build It At All.