Adrian | JavaScript Mastery

@jsmasterypro

Founder @ JS Mastery @GitHub Star, software engineer & educator

Croatia

jsmastery.com

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Adrian | JavaScript Mastery
@jsmasterypro
Sep 6
Every app breaks in the same order. First one server can't keep up. Then your users get randomly logged out. Then the database runs out of connections. Then the same expensive query melts it. Then slow jobs block everything. New video: we take one app and break it on purpose,
How Senior Engineers Actually Think About System Design & Architecture | Full Course
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Adrian | JavaScript Mastery
@jsmasterypro
17h
You've seen the magic trick. You start a fresh project, describe what you want, and the agent scaffolds a working app in minutes. Then you point the same agent at the codebase you actually get paid to work on. And the magic is gone.
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The AI that aced your side project will struggle with your real one
You've seen the magic trick. You start a fresh project, describe what you want, and the agent scaffolds a working app in minutes. Clean structure, sensible names, tests that pass. It feels like the...
2
Adrian | JavaScript Mastery
@jsmasterypro
17h
Every piece you add to a system has a cost. A load balancer spreads traffic across your servers, but now everything flows through one box. If it goes down, your three healthy servers behind it are useless.
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Adrian | JavaScript Mastery
@jsmasterypro
Sep 14
Where every AI coding agent actually sits right now.
5
Adrian | JavaScript Mastery
@jsmasterypro
Sep 14
Before you reach for anything clever with a slow database, check one thing. Are your common queries using indexes? A missing index makes the database scan every row to find one person. It looks exactly like a capacity problem when it isn't. And the fix is free.
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