Jonathan Lassoff
Staff Security Engineer at San Francisco Metropolitan Internet Exchange
San Francisco, California, United States
Summary
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RockstarJonathan Lassoff is a Staff Security Engineer with 16 years of infrastructure, networking, and ops experience, now building platform security at Crusoe in San Francisco. He brings deep operational knowledge from long-standing work with the San Francisco Metropolitan Internet Exchange, where he focuses on transparent netdevops and local participant diversity. Comfortable at the intersection of internet-scale networking, telecoms, and security, he translates operator-first practices into secure, auditable platform designs. Known as an Internet and telecoms geek on GitHub, he blends hands-on troubleshooting with strategic security engineering. Colleagues rely on him for pragmatic, scalable controls that respect operational realities while reducing risk. He often surfaces non-obvious operational threats by combining packet-level intuition with platform security tooling.
16 years of coding experience
Stackoverflow
304reputation
58kreached
2answers
0questions
Github Skills (200)
devsecops10
reader10
python10
vulnerability-scanners10
mifare10
nfc10
firewall10
sbom10
bastion10
rdp10
optical-drive10
wireguard10
security10
openldap10
automation10
Programming languages (18)
Github contributions (5)
sfmix/sfmix
Mar 2024 - Jul 2026
San Francisco Metropolitan Internet eXchange
Contributions:1 review, 1 PR, 241 pushes in 2 years 4 months
internet-exchange-pointinternet-routing
jof/ubbnut
Sep 2011 - Sep 2014
Contributions:13 commits in 3 years
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