Ondrej Dubaj
Senior Softwarový Inženýr at Dynatrace
Slovakia
Summary
🤩
Rockstar🎓
Top SchoolOndrej Dubaj is a Senior Software Engineer with 14 years of experience specializing in Kubernetes and cloud-native solutions, currently contributing at Dynatrace from Slovakia. A Keptn maintainer and OpenTelemetry collector triager, he blends observability and platform engineering to improve reliability and operational insight. His open-source work spans high-performance and security-critical projects—from optimizing Argon2 with AVX-512 to improving SELinux tooling and FIPS-aware initramfs—demonstrating deep systems and security expertise. He has also improved core algorithmic code in widely known projects like the Stockfish chess engine, focusing on probing and search efficiency. Known for pragmatic refactoring and performance tuning, Ondrej connects low-level optimization with scalable cloud architectures. He holds engineering degrees from Brno University of Technology and brings a rare mix of security, performance, and cloud-native fluency.
14 years of coding experience
3 years of employment as a software developer
Inženýr (Ing.), Informační technologie, Inženýr (Ing.), Informační technologie at Brno University of Technology
Github Skills (39)
algorithm10
password-hash10
algorithms10
c-language10
scripting10
drc10
bash10
kernel-module10
c-programming10
c1110
linux-kernel10
data-structure10
c1710
kernel10
selinux10
Programming languages (13)
Github contributions (5)
SELinuxProject/selinux
Oct 2018 - Jun 2022
This is the upstream repository for the Security Enhanced Linux (SELinux) userland libraries and tools. The software provided by this project complements the SELinux features integrated into the Linux kernel and is used by Linux distributions. All bugs and patches should be submitted to selinux@vger.kernel.org
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:56 commits, 4 PRs, 9 pushes in 3 years 8 months
Contributions summary:Ondrej primarily contributed to the Security Enhanced Linux (SELinux) userland libraries and tools, fixing bugs and improving security aspects. Their commits focused on addressing issues related to file context restoration, enforcing port validity checks for InfiniBand, and optimizing policy rule storage and performance. The user also added a feature for detecting and handling module changes, contributing to the system's maintainability.
kerneldistributionsvgerintegratedlinux-distribution
fedora-selinux/selinux-policy
Feb 2019 - Dec 2022
selinux-policy for Fedora is a large patch off the mainline
Role in this project:DevOps Engineer & System Administrator
DevOps Engineer & System AdministratorContributions:225 reviews, 119 commits, 79 PRs in 3 years 10 months
Contributions summary:Ondrej's contributions primarily focused on automating build processes and improving the system's infrastructure. They added and improved SRPM build scripts for COPR, demonstrating knowledge of build systems. The user also modified system configuration files for SELinux, including the addition of file contexts and resolving permission issues, which indicated system administration and security engineering skills. Furthermore, they fixed issues related to the Git repository's handling within the build process, which enhanced the stability and reliability of the CI/CD pipelines.
policypatchsecurityansibleselinux
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