Ivan Iushkevich
Lead Application Security Engineer
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolIvan Iushkevich is a Lead Application Security Engineer with 10+ years of hands-on experience hunting vulnerabilities across banking systems, web apps, and infrastructure. Based in Amsterdam, he builds offensive security programs and company-wide secure development initiatives, having led training, Security Champions, and PCI awareness at Just Eat Takeaway.com. A seasoned penetration tester and former team lead, he has practical experience automating analysis (SAST/DAST), extending tooling like Semgrep for SonarQube, and developing dynamic binary instrumentation modules earlier in his career. He also teaches a Master's course in Safe Software Engineering and creates CTF-like platforms and training materials, blending academic rigor with applied red-team practice. Known on GitHub as Steph, he combines event-driven community building with frequent security research and bespoke tooling rather than just one-off bug bounties.
10 years of coding experience
9 years of employment as a software developer
Диплом специалиста по инженерной специальности Безопасность компьютерных и информационных систем/защита информации, Диплом специалиста по инженерной специальности Безопасность компьютерных и информационных систем/защита информации at Peter the Great St.Petersburg Polytechnic University
Github Skills (48)
wordlist10
opencl10
penetration-testing10
gpgpu10
devrel10
shadow10
cracking10
duplicate-detection10
hashcat10
recovery10
password-generator10
password-strength10
password-manager10
passwords10
passphrase10
Programming languages (7)
Github contributions (5)
zzzteph/dictionary_brute
Jun 2016 - Jan 2017
Contributions:49 commits, 2 PRs, 79 pushes in 6 months
zzzteph/DutchGovScope
Jan 2024 - Mar 2025
Dutch Government Bugbounty scope analysis, subdomains and url lists
Contributions:16 PRs, 218 pushes, 2 branches in 1 year 2 months
bugbountydutchinfosecpentestsecurity
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