Simon Ratajczak
Senior Penetration Tester
Poland
Summary
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SeniorSimon Ratajczak is a Senior Penetration Tester with nine years of hands-on experience delivering 100+ assessments across web, API, cloud and internal infrastructure for finance, e-commerce and logistics clients. He specializes in AWS security and has prevented potential data exposure affecting over 500k users through identification and remediation of critical misconfigurations. Simon pairs technical red-team skills—phishing campaigns and simulated attacks—with pragmatic remediation workshops and executive reporting that measurably reduce risk and improve security culture. He has automated vulnerability scanning with Python and PowerShell to boost efficiency, supported SOC teams with MITRE ATT&CK mappings, and mentored junior testers to raise testing standards. Comfortable in both enterprise and freelance settings, he brings a blend of cloud deployment experience from earlier roles and a user-focused approach to translating technical findings into business value. Based in Poland, he combines deep technical rigor with clear communication to drive actionable security outcomes.
8 years of coding experience
English, PolishGithub contributions (5)
SzymoRatajczak/Ransomware-detection-of-virtual-machines
Jan 2018 - Oct 2019
Contributions:3 commits, 2 pushes, 1 branch in 1 year 9 months
SzymoRatajczak/E-shop
Jul 2017 - Mar 2018
Contributions:47 pushes, 1 branch in 8 months
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