JKCTech

Jeffrey Koopman

Software Developer / Ethical Hacker / Freelancer
I am a 25 year old software developer from The Netherlands.
I build creative tools, explore tech systems, and share insights through code and projects.
From Arduino builds and decoding tools to open-source software and radio tech, I love turning ideas into working solutions.
Jeffrey


Latest Blog Posts

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Vereisten Op Ziggo Modems Omzeilen

Soms, heb je nou nét iets nodig wat je modem / router niet kan bieden.

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My Radar Box Setup

My custom radar box for receiving airplane and pager signals.

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Detecting Police Presence?

Detecting the presence of emergency services by radio signals.

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Tracking Planes on Twitter

How I made a bot tracking Max Verstappen's private jet on Twitter

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Impact with F12

How I injected a custom highscore in a minigame from NS called "Impact With Your Code".

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Telegram Trilateration

Proof of concept for abusing Telegram's "People Near Me" feature and tracking people's location.

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Logo Workshop

A (Dutch) mini-workshop in LOGO for teenagers.

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Getting Started With Arduino

A short crash course into electronics and Arduino!

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