Simple architecture diagram examples

Small boards, a good place to see what a board can do.

• URL shortener, like BitlyThe first system design interview question: key generation, heavy reads, a cache in front, and click analytics off the request path.
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• Rate limiterToken bucket or sliding window? Where it runs, how nodes share counts and what happens when the limiter itself is down.
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• Clean architecture in UMLUse cases, ports and adapters as a class diagram, with the arrows pointing the right way.
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• Screens of a habit tracker appA mobile app sketched screen by screen, with where each button goes.
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• SaaS starter: one deploy, real customersWhat most products actually need at the start: a monolith, managed Postgres, auth, Stripe and error tracking. And what to leave out.
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