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Caching is usually introduced as a performance optimization. Over time, it often becomes a source of behavioral inconsistency that is harder to reason about than the system it was meant to improve.

Languages and frameworks change constantly. Foundational skills last. These are the core abilities that make developers effective across technologies and over time.

Debugging is not about guessing or trial and error. It is a systematic skill that relies on observation, reasoning, and understanding how systems actually fail.

Clean code is not about strict rules or elegance. It is about clarity, context, and making software easy to change over time.

A practical look at common early-career mistakes in software development and how to approach them more effectively.