Petr Menšík
Software Engineer at Red Hat EMEA
Brno, Southeast, Czechia
Summary
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Rockstar🎓
Top SchoolPetr Menšík is a software engineer based in Brno with nine years of professional experience building and maintaining DNS and networking software, currently contributing at Red Hat EMEA. He is a C/C++ systems programmer and long-time GNU/Linux enthusiast with deep expertise in DNS, DNSSEC, BIND9, dnsmasq and related network services. His open-source contributions include back-end fixes and refactors to high-profile projects such as Pi-hole's FTL engine and ISC BIND9, where he improved memory management, parsing robustness and IDN handling. Petr combines hands-on server administration—web, mail, Samba domain controller—and low-level network programming, making him comfortable across both operational and code-level problem solving. Notably, his work restoring non-recursive DNS behavior and fixing IPv6 prefix calculations shows attention to edge-case correctness that improves real-world stability.
9 years of coding experience
6 years of employment as a software developer
Bachelor, Information Technology, Bachelor, Information Technology at Brno University of TechnologyElectronic computers, weak current electronics, Electronic computers, weak current electronics at SPSE BrnoElementary
English, Czech
Stackoverflow
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Github Skills (14)
c1710
memory-management10
dnsmasq10
pihole10
dns10
c1110
c-programming10
network-programming10
database9
build-system9
debug9
configuration-management9
debugging9
databases9
Programming languages (15)
Github contributions (5)
isc-projects/bind9
Aug 2017 - Jan 2023
Mirror of https://gitlab.isc.org/isc-projects/bind9, please submit issues and PR/MRs in the GitLab. Any issues and PRs opened here will be closed without a comment.
Role in this project:
Backend Developer
Backend DeveloperContributions:108 commits, 1 comment in 5 years 6 months
Contributions summary:Petr contributed to the Bind9 DNS server project, focusing on improving and refactoring the codebase. They removed support for older IDN libraries, updated IDN initialization and sanitization. Furthermore, they made changes to the build system, including documentation and configuration. Their commits also involved refactoring of existing code blocks and fixing potential issues.
openedbind9dnsclosedbind
pi-hole/FTL
Oct 2018 - Nov 2022
The Pi-hole FTL engine
Role in this project:Back-end Developer
Back-end DeveloperContributions:50 commits, 1 PR in 4 years 1 month
Contributions summary:Petr primarily contributed to the Pi-hole FTL engine by modifying the core C code of dnsmasq. Their work included refactoring code for improved memory management and efficiency, particularly around option parsing and configuration file handling. They addressed memory leaks and fixed parsing errors, enhancing the overall stability of the dnsmasq component. Further contributions involved restoring functionality related to handling non-recursive requests and fixing IPv6 prefix calculations.
apidnsftlpi-hole-ftlpi-hole
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