Jiří Morariu
System Administrator
Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolJiří Morariu is a systems-focused engineer and system administrator based in Prague with 16 years of hands-on experience across programming, embedded hardware and network security. Since 2020 he has worked at CZ.NIC, applying practical skills in C#, Python and JavaScript while managing systems and improving operational security. He contributes to low-level open-source work, notably improving time management and thread safety in the HelenOS microkernel project, reflecting a strong grasp of concurrent systems and kernel internals. Jiří also builds IoT and home automation solutions with Arduino and Raspberry Pi, bridging embedded prototyping with production system thinking. His background blends desktop and web development with a recent emphasis on network security, making him comfortable across the full stack of devices, services and infrastructure.
16 years of coding experience
Student, Computer and Information Sciences, General, 4, Student, Computer and Information Sciences, General, 4 at SOŠ a SOU Hořovice
English, German, polština, italština
Github Skills (14)
kernel10
time-management10
low-level-programming10
microkernel10
concurrency10
operating-system10
c119
locks9
c179
locking9
data-structure7
data-structures7
algorithm7
algorithms7
Programming languages (12)
Github contributions (5)
HelenOS/helenos
Aug 2022 - Jan 2023
A portable microkernel-based multiserver operating system written from scratch.
Role in this project:
System Architect / Software Architect
System Architect / Software ArchitectContributions:31 reviews, 11 commits, 112 PRs in 5 months
Contributions summary:Jiří primarily focused on improving the core time management mechanisms within the microkernel operating system. They updated the uptime calculation, replaced timeout structures with deadlines, and refactored timeout handling for improved efficiency and thread safety. The user also removed unnecessary locking mechanisms and cleaned up code.
driverskernelmicrokerneloperating-systemusb
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