Jari Jääskelä
Bug Bounty Hunter at Suomen Varaosakeskus Oy
Finland
Summary
👤
Senior🎓
Top SchoolJari Jääskelä is a bug bounty hunter and software developer with nine years of experience blending offensive security, code review, and applied software engineering. He has responsibly disclosed multiple high-impact CVEs — including remote code execution and file upload flaws in VMware products and Apache Kafka Connect — demonstrating deep expertise in finding complex injection and authentication-related issues. Based in Finland, he pairs freelance security testing with full-time work building internal tools, ERP integrations, and e-commerce systems at Suomen Varaosakeskus Oy. His research background at the University of Oulu involved security assessments for healthcare products, creating CTF challenges, and security-focused development, showing an unusual mix of academic rigor and practical exploitation skills. Comfortable across web, mobile, and embedded stacks, he brings hands-on experience in Qt/C++, Python, and web technologies to both offensive testing and secure feature development. He combines a master’s in computer science with a pragmatic mindset that turns vulnerability research into actionable improvements for production systems.
9 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Electrical Engineering, Bachelor's degree, Electrical Engineering at Centria University of Applied SciencesMaster's degree, Computer Science and Engineering, Master's degree, Computer Science and Engineering at University of OuluICT technician, Information and communications technology, ICT technician, Information and communications technology at JEDU
English, Finnish
Github Skills (31)
fingerprint10
infosec10
security10
vulnerability-detection10
source-code-analysis10
vulnerabilities10
robot9
nxt9
ros8
robotics8
embedded-software8
side-channel-attacks7
embedded7
robot-control6
buffer-overflow5
Programming languages (6)
Github contributions (5)
Jarijaas/go-googleplay
Dec 2020 - Nov 2021
Contributions:3 releases, 46 commits, 39 pushes in 10 months
Jarijaas/RS3Bot
Oct 2019 - Mar 2021
Bot for Runescape NXT client (non functional currently)
Contributions:3 commits, 5 pushes, 1 branch in 1 year 5 months
nxtbotnon-functionalrunescape
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