Writing on the things I build

Deep-dives into the projects — how they work under the hood, and what building them taught me. Grounded in real code, not theory.

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  Security

  Building a terminal packet sniffer

  A producer/consumer capture pipeline, pluggable threat detectors, and offline PCAP analysis — how Packet Analyzer works and why the terminal, not a GUI.

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  Engineering

  Building a POS on a raw HTTP server

  No Express, no React, no ORM — a full point-of-sale on vanilla Node.js. Hand-rolled routing, an EAN-13 barcode generator, and a backup system, and what the hard way taught me.

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