Kacper Kwapisz
Web Application Penetration Tester
Poland
Summary
👤
Senior🎓
Top SchoolKacper Kwapisz is a web application penetration tester with over a decade of experience helping startups, small firms and international corporations harden their systems. He combines deep hands-on pentesting and cloud security reviews with a developer’s background across PHP, Python, Perl, Kotlin, Delphi and C#, enabling him to both find vulnerabilities and build tooling to reproduce or mitigate them. As founder of Specfile.pl and current lead at SoSecureWow, he has delivered assessments for clients including Sony and contributed to public security research and bug bounty programs. Kacper’s work has been independently acknowledged by major vendors—Google, Facebook, Apple (CVE-2023-42843), PayPal, Yahoo and Salesforce—demonstrating a consistent track record of impactful, responsibly disclosed findings. Based in Poland, he pairs commercial engagement experience with ongoing security research and tool development, often bridging the gap between offensive discovery and practical remediation.
8 years of coding experience
6 years of employment as a software developer
Poznan University of Technology
German, Polish, English
Github Skills (49)
chatgpt-api10
openai-api10
chatgpt10
jira10
openai10
taiga10
context-menu10
rest-api10
gpt10
reverse-engineering10
chatbot10
kanban9
postgresql9
redis9
project-management9
Programming languages (5)
Github contributions (5)
kacperkwapisz/kacperkwapisz
Dec 2020 - Mar 2025
Contributions:10 pushes, 1 branch in 4 years 3 months
kacperkwapisz/supreme-api-rewritten
Mar 2021 - Mar 2021
Contributions:1 release, 18 commits, 16 pushes in 1 day
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