About me

Michal Válka

Hello! My name is Michal Válka and you might know me under my nickname Warxim.

I am developer & security specialist from Brno (Czech Republic), where I also study Information Management at VUT Faculty of Business and Management.

I spend most of my time doing penetration tests of various software applications and developing own tools, however, in my spare time I also like to paint digital art.

If you have any questions, do not hesistate to contact me using the contact form at the end of this page.


I love programming both web and desktop applications using Java, Javascript and Python.

Ethical Hacker

I am interested in ethical hacking and I work as Cyber Security Specialist at AEC a.s.

Digital Artist

I like to paint both images from reference (portraits and scenes from movies) and concept art.



PETEP (abbreviation for PEnetration TEsting Proxy) is my open-source Java application project for network communication proxying for the purpose of penetration testing. It allows testers to setup proxies and interceptors to manage the traffic transmitted between client and server. PETEP is also extensible and modular, which can be used to create support for new protocols and/or new intercepting modules.

Website: PETEP

Technologies: Java & JavaFX



If you would like to contact me, please fill in the form bellow.

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