Most software problems feel complex… until you look at them like a computer.

Every computer only does 3 things: input → process → output.

That’s it.

As a software engineer, this mindset is powerful. Instead of overthinking a system, just ask:

What’s coming in? What should happen to it? What should come out?

Take a payment API for example: request comes in (input), you validate + process + call external services (process), then return success or failure (output). Simple.

When you think this way, big problems stop feeling overwhelming. You’re just moving data from input to output—one clear step at a time.

Master this, and you simplify everything you build.

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