Nikos Mavrogiannopoulos

Brno Metropolitan Area Czechia

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Summary

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Rockstar

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Top School

Nikos Mavrogiannopoulos is a seasoned product manager and engineering leader with 26 years of experience specializing in cryptography and cybersecurity product delivery. He has driven strategic outcomes at scale—shaping Ubuntu's security product strategy, extending its 10-year lifecycle, and spearheading Red Hat’s FIPS certification efforts to win US public sector trust. A hands-on technologist and original author of the OpenConnect VPN server and significant GnuTLS work, he bridges deep cryptographic research (PhD in Cryptography Engineering) with pragmatic product execution. His open-source contributions span high-impact projects like libcurl, OSS-Fuzz and OpenWrt/LuCI, where he improved security hardening, fuzzing infrastructure, and VPN integrations. He’s also proven at team-building and turnaround work, restructuring underperforming groups into highly engaged teams. Based in Brno, he combines academic rigor with a practical knack for shipping secure, auditable systems used in large-scale and public-sector deployments.

26 years of coding experience

MSc, Information Security Technology, MSc, Information Security Technology at Eindhoven University of Technology

Diploma, Mathematics, Diploma, Mathematics at University of Ioannina

Doctor of Philosophy (PhD), Cryptography Engineering, Doctor of Philosophy (PhD), Cryptography Engineering at Katholieke Universiteit Leuven

Stackoverflow

Stats

549reputation

75kreached

19answers

0questions

Github Skills (56)

site-design10

network-configuration10

c-language10

website-development10

qt10

vpn10

openconnect10

css10

gnutls10

bash10

c1110

libcurl10

networking10

security10

c1710

Programming languages (18)

JavaCSSC++CMakefileGoPerlHTML

Github contributions (5)

google/oss-fuzz

Dec 2016 - Sep 2020

OSS-Fuzz - continuous fuzzing for open source software.

Role in this project:

Security Engineer

Contributions:1 review, 18 commits, 21 PRs in 3 years 9 months

Contributions summary:Nikos primarily contributed to the security hardening of the `oss-fuzz` project, focusing on build configurations for fuzzing. Their work involved modifying build scripts, specifically for projects like `gnutls` and `libidn2`, to integrate memory sanitizers, disable potentially problematic system calls, and optimize for the fuzzing environment. These changes include statically linking dependencies to aid memory tracking and preventing external corpora use. The user also implemented a new fuzzing architecture with static libraries.

oss-fuzzfuzz-testingossvulnerabilitiessecurity

openconnect/openconnect-gui

Aug 2014 - Jan 2016

Mirror - Graphical OpenConnect client (beta phase)

Role in this project:

Full-stack Developer

Contributions:5 releases, 57 commits, 6 PRs in 1 year 5 months

Contributions summary:Nikos primarily contributed to the graphical user interface of the openconnect client. They added functionality to manage servers, including adding, removing, and editing server configurations. Code changes involved modifications to `mainwindow.cpp`, `storage.cpp`, and `editdialog.cpp` to implement these features. They also made improvements to certificate handling, added a view log dialog, and incorporated UI updates.

graphicalopenconnectjavascriptphase

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