Jan Seredynski
Mobile Security Researcher & Pentester at Guardsquare
Warsaw, Masovian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolJan Seredynski is a Mobile Security Researcher and Pentester with 11 years of experience focused on hardening and attacking iOS and Android applications. He currently leads mobile security research at Guardsquare after roles securing banking apps and performing in-depth pentests at Synopsys, KPMG and Lloyds Banking Group. His background as an iOS developer gives him practical insight into secure architecture, obfuscation and App Store delivery, while his reverse-engineering work leverages tools like IDA, Frida and Hopper. Jan holds a joint master's in Computer System Security and combines academic rigor with hands-on adversary simulation across mobile, web and IoT platforms. Colleagues rely on him to bridge developer and security teams, turning complex vulnerabilities into actionable remediation and resilient app designs. Based in Warsaw, he brings a rare blend of attacker mindset and developer experience that accelerates secure feature delivery.
11 years of coding experience
3 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at QUT (Queensland University of Technology)Master's degree, Computer System Security (joint degree), Master's degree, Computer System Security (joint degree) at Vrije Universiteit Amsterdam (VU Amsterdam)Master's degree, Computer System Security (joint degree), Master's degree, Computer System Security (joint degree) at University of AmsterdamBachelor's degree, Computer Science, Bachelor's degree, Computer Science at Wroclaw University of Science and Technology
Polish, English, German
Github Skills (39)
ios10
static-analysis10
network-analysis10
testing10
hacking10
verification10
application-security10
security10
mobile-application10
security-testing10
owasp10
mobile-security10
android10
dynamic-analysis10
pentesting10
Programming languages (8)
Github contributions (5)
serek8/leathing-phonegap
Jan 2015 - Mar 2017
Contributions:148 pushes, 1 branch in 2 years 1 month
serek8/owasp-mstg
Apr 2020 - Mar 2025
The Mobile Security Testing Guide (MSTG) is a comprehensive manual for mobile app security development, testing and reverse engineering.
Contributions:59 pushes, 13 branches in 4 years 11 months
mobile-appmstgengineeringiosmobile
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