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Hey, I'm Jeffrey! πŸ‘‹

Twitter Follow Linkedin: Jeffrey Koopman GitHub followers website

I am a 24 year old developer / software engineering student from The Netherlands.

I like:

  • πŸ€– Electronics / Arduino (C / C++)
  • 🌐 Web Development (HTML, PHP, CSS, JavaScript)
  • 🐍 Python

Proudest Projects


Dutch Emergency Services pager dashboard and aviation radar using HTML, CSS, JavaScript, PHP, Python and Bash.

Telegram Trilateration

Proof of concept OSINT tool to calculate people's locations by abusing some of the app-features using Python.


Free alternative management and control software for Uniden Bearcat 125 / 126 models using C# and Python.


Connect your Nintendo Wii guitar to your PC using an Arduino and C#.


JKCTech's Github Stats JKCTech's Top Languages

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  1. Telegram-Trilateration Telegram-Trilateration Public

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

    Python 562 79

  2. SPARK125 SPARK125 Public

    Alternative software for Uniden Bearcat 125 / 126 models

    C# 9 1

  3. ManualKIX ManualKIX Public

    Manual KIX decoder for Dutch post / PostNL barcodes


  4. WiiHero WiiHero Public

    Connect a Wii guitar to your PC in combination with an Arduino

    C# 11 3