Michal Sekletar
Senior Principal Software Engineer at Red Hat
Brno, Southeast, Czechia
Summary
🤩
Rockstar🎓
Top SchoolMichal Sekletar is a Senior Principal Software Engineer with 14 years of experience, currently shaping core Linux infrastructure at Red Hat and contributing to the world’s largest open-source ecosystem. He specializes in operating systems and low-level systems engineering, with notable contributions to high-profile projects like systemd, libpcap and tcpdump that improve journaling, cgroup management, packet capture precision and security posture. His work on libpcap and tcpdump introduced nanosecond timestamp precision and safer privilege handling, demonstrating a blend of precision engineering and security-minded design. At Red Hat he has progressed from package maintainer to senior technical lead, routinely interfacing with kernel-level features such as cgroup freezer and CPU affinity. Based in Brno, he pairs a master’s in Computer Networks with a community-focused open-source mindset, often hacking alongside some of the industry’s brightest contributors. Colleagues describe him as a pragmatic systems hacker who prefers subtle, impactful improvements over flashiness.
14 years of coding experience
Master's degree, Computer Networks and Communication, Master's degree, Computer Networks and Communication at Brno University of Technology
English, Slovak, Czech, German
Github Skills (19)
it-security10
linux10
c1110
security10
c1710
packet-capture10
libpcap10
system-administration10
systemd10
tcpdump10
cgroups10
system-programming9
debugging9
init9
auditing8
Programming languages (10)
Github contributions (5)
systemd/systemd
May 2015 - Apr 2025
The systemd System and Service Manager
Role in this project:
Backend Developer & Systems Engineer
Backend Developer & Systems EngineerContributions:223 reviews, 232 PRs, 1 push in 10 years
Contributions summary:Michal primarily contributed to systemd's core functionality, addressing various issues and implementing enhancements related to system and service management. Their work involved modifications to the path, cryptsetup, and sd-journal components, indicating a focus on system initialization, storage management, and journal logging. The user demonstrated a deep understanding of systemd's internals, kernel interactions, and cgroup management, notably adding support for cgroup freezer and integration for setting CPU affinity.
servicesservice-managervagrantlinuxinit
the-tcpdump-group/libpcap
May 2013 - May 2015
the LIBpcap interface to various kernel packet capture mechanism
Role in this project:Back-end Developer
Back-end DeveloperContributions:12 commits, 6 PRs, 19 comments in 1 year 11 months
Contributions summary:Michal primarily contributed to the development of the libpcap library, focusing on improving timestamp precision configuration. They introduced new functions for setting and getting timestamp precision, and modified existing functions to handle nanosecond precision. The user also added new functions and modified existing code to support different file formats including pcap-ng. Additionally, the user worked on BPF filter extensions and improved their implementation within the library.
bpfkernelmechanismbsd-packet-filternetwork-tools
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