Gracjan Jaśkiewicz
Senior Security Engineer at nexos.ai
Warsaw, Masovian Voivodeship, Poland
Summary
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SeniorGracjan Jaśkiewicz is a Senior Security Engineer based in Warsaw with eight years of hands-on experience in penetration testing and application/system security across consultancy, enterprise, and fintech environments. He has progressed from IT roles into leadership positions—most recently at nexos.ai after principal research work at HSBC and heading penetration testing at Kyndryl—bridging offensive testing with strategic security programs. Comfortable in both offensive red-team work and building repeatable security processes, he’s known for translating complex technical findings into actionable remediation for diverse stakeholders. Though concise on GitHub, his career demonstrates a pattern of tackling high-risk environments (banking, enterprise IT, and AI-focused startups), hinting at a pragmatic, risk-centered approach to security.
8 years of coding experience
4 years of employment as a software developer
Polish, English
Github Skills (26)
burp9
injection9
dictionary9
fault8
pentest8
discovery8
dns-resolver7
security7
enumerate7
wildcard6
bruteforce4
dns4
shodan4
pentesting3
legion3
Programming languages (3)
Github contributions (5)
gracjanj/Reflection-Tracer
Jul 2019 - Oct 2019
Contributions:35 commits, 34 pushes, 1 branch in 2 months
tzarg/ctfs
Jun 2018 - Feb 2019
Contributions:17 pushes, 1 branch in 7 months
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