Spiros Kaftanis Work with me

Journal

Notes from
the build.

What I learn shipping software for real businesses. No hot takes, no tool worship. Just what held up in production and what did not.

Security

When randomness looks random

A hardware wallet incident was not a break in Bitcoin. It was a firmware integration failure, and a reminder that security lives in the path between components.

8 min read
Growth

Your next customer will ask an AI about you

Search stopped being a list of links and became an answer. What that changes for a local business, what it does not change at all, and the work that still moves the needle.

6 min read
Practice

AI is a multiplier, not a replacement

Two years of building with it every day, and a plain account of what actually got faster, what did not move at all, and why the difference matters more than the tooling.

6 min read
Systems

The spreadsheet nobody is allowed to touch

Every business I work with has one. It runs a critical process, one person understands it, and everyone is quietly afraid of it. Here is what it really costs and how to replace it without breaking the week.

5 min read

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I answer every message myself, usually the same day.

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