Every engineer has a moment early in their career when they realize the truth: You cannot learn everything. Much like doctors choose specialties, engineers eventually pick lanes. Backend, infrastructure, DevOps, mobile, frontend, machine learning systems. Not because we lack curiosity, but because there is simply too much to know. Technology evolves, interests shift, tools advance and our skills follow.
Yet beneath all the specialization, there is a shared foundation. We all learned how variables work. How databases scale. Why sharding…

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