Jonas Vestberg
Software Engineer
Stockholm, Sweden
Summary
👤
SeniorJonas Vestberg is a Stockholm-based software engineer and technical security consultant with 13 years of hands-on experience and a hacker mindset shaped by penetration testing and red-team engagements. He blends offensive security expertise with pragmatic software development, focusing on building resilient systems that anticipate real-world attacker behavior. Comfortable both breaking and hardening applications, Jonas translates vulnerability research into actionable engineering improvements and secure design patterns. Known as a curious tinkerer on GitHub, he pairs a "hacker and wannabe developer" ethos with disciplined delivery, making complex security concepts accessible to product teams. Quietly pragmatic, he often uncovers simple, overlooked weaknesses that yield outsized risk reduction.
13 years of coding experience
Github Skills (25)
wmi9
kerberos9
windows9
network-protocol9
metasploit9
python8
blogging-application8
impacket8
privilege-escalation8
dcom7
porting7
smb7
msrpc7
netbios7
dotnet6
Programming languages (5)
Github contributions (5)
bugch3ck/SharpKatz
Oct 2021 - May 2022
Porting of mimikatz sekurlsa::logonpasswords, sekurlsa::ekeys and lsadump::dcsync commands
Contributions:2 pushes in 7 months
portingpythonlinuxcli
bugch3ck/imposter
Apr 2014 - Jun 2014
Contributions:4 commits in 1 month
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