Software Engineer Documents Journey to Rebuild Computer Science Fundamentals From Scratch

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A practicing software engineer has launched a self-directed learning series aimed at closing the gap between practical coding skills and deep understanding of how computers actually work. Despite professional experience with tools like React, Node.js, and cloud services, the author found their mental model of underlying system behaviour surprisingly weak. The series will progress through layers from CPU and memory up through operating systems, networking, databases, concurrency, and distributed systems. Rather than following a traditional CS curriculum, the approach is driven by real-world questions such as why systems slow down, where bottlenecks form, and what happens during concurrent execution. The author is publishing the notes publicly on DEV Community, framing them as a learning-in-progress resource for other engineers who share the same knowledge gap.

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