Jan Čermák
Softwarový Inženýr at Media Heroes s.r.o.
Prague, Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolJan Čermák is a pragmatic software engineer with 12 years of experience, based in Prague, who blends backend development, DevOps and embedded systems expertise. He contributes to the widely used Home Assistant Operating System, where he implemented Labgrid-based OS tests, improved Raspberry Pi builds, and tightened CI image checks—work that benefits millions of smart-home users. Currently building backend systems (Python/Kotlin) across startups and agencies, he focuses on reliable build pipelines and robust embedded integrations. A hardware hacker and private smart-home aficionado, he brings hands-on knowledge of devices and firmware to software projects. Jan is also an open-source enthusiast and homebrewer, traits that reflect his methodical experimentation and attention to craft.
13 years of coding experience
Bakalář (Bc.), Computer and Information Sciences, General, Bakalář (Bc.), Computer and Information Sciences, General at Masarykova univerzita Brno, Fakulta InformatikyMaturita, Computer and Information Sciences, General, Maturita, Computer and Information Sciences, General at Střední škola technická a dopravní Gustava Habrmana Česká TřebováBakalář (Bc.), Computer and Information Sciences, General, Bakalář (Bc.), Computer and Information Sciences, General at Univerzita Pardubice
Github Skills (22)
buildroot10
firmware10
linux-kernel10
driver10
sys10
embedded10
scripting9
qemu9
dockers9
c119
docker9
c179
wifi9
shell9
script9
Programming languages (15)
Github contributions (5)
home-assistant/operating-system
Jun 2023 - Jun 2026
:beginner: Home Assistant Operating System
Role in this project:
DevOps & Embedded Systems Engineer
DevOps & Embedded Systems EngineerContributions:5 releases, 247 reviews, 850 PRs in 3 years
Contributions summary:Jan focused on enhancing the Home Assistant Operating System by establishing a foundation for Labgrid-based OS tests and integrating new test suites for the Supervisor. They also addressed issues in the Raspberry Pi build process, including kernel updates, and fixed the use of the miniUART on the Yellow device. Further contributions included improving the handling of timeouts in tests and contributing to the project's build process with image size checks and other fixes.
home-assistantoperating-systemiothassbuildroot
sairon/score-phorum
Sep 2015 - Jun 2026
Score Phorum shall never die!
Contributions:15 reviews, 58 PRs, 193 pushes in 10 years 10 months
minecraftdieazerothcorenevergarden
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