Krzysztof Marciniak
Security Engineer at Przelewy24
Poland
Summary
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Top SchoolKrzysztof Marciniak is a Security Engineer with 14 years of hands-on experience evolving from developer and system administrator roles into offensive-minded security consulting. He has a proven track record across product security, vulnerability research, and penetration testing at firms including F-Secure, WithSecure, Argus Cyber Security, and Przelewy24. Comfortable with both application and hardware security, he blends source-code review, dynamic debugging and threat modeling to help teams design more resilient systems. Colleagues rely on him for practical, security-first guidance and for delivering training that raises detection and response capabilities. Outside of work he pursues continuous learning and channels creativity through saxophone and tin whistle performance, an indicator of his patience and attention to detail. Based in Poland, he also brings a genuine passion for knowledge sharing and animal welfare to his professional interactions.
14 years of coding experience
9 years of employment as a software developer
Bachelor of Science (B.Sc.), Computing and Information Science, Bachelor of Science (B.Sc.), Computing and Information Science at Poznan University of Technology
Polish, English, Russian, Japanese
Github Skills (41)
mozilla9
dispatch8
python8
infrastructure7
iot6
scale6
zeromq6
infrastructure-management6
web-application6
remote-execution5
cryptocurrency5
honeypot5
bitcoin5
configuration-management5
in-memory5
Programming languages (4)
Github contributions (5)
hun7err/unknown-game
Dec 2013 - Feb 2015
Contributions:165 commits in 1 year 2 months
hun7err/Chess
Oct 2012 - Feb 2014
Contributions:50 commits in 1 year 4 months
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