Umer Saleem
Operating Systems Engineer
Pakistan
Summary
🤩
Rockstar🎓
Top SchoolUmer Saleem is an Operating Systems Engineer with 7+ years in embedded and system software, currently driving OS-level solutions at iX. He brings deep kernel and storage expertise—file systems, device drivers, UEFI, hypervisors and virtualization features like Intel VT-x/VT-d—paired with hands-on experience in C/C++, Python, and low-level tooling such as GDB, Ftrace and Lauterbach Trace32. A committed open-source contributor, he has made substantive back-end improvements to OpenZFS including performance tuning for zpool trim, native Debian packaging, and fixes to snapshot and mountpoint handling. His background spans RTOS, Type-1 hypervisors, ACPI and cross-architecture work on x86-64 and ARMv8, reflecting a blend of embedded firmware and large-scale storage systems thinking. Based in Pakistan, he combines system-level craftsmanship with practical automation and packaging experience that eases bringing kernel innovations into production.
4 years of coding experience
3 years of employment as a software developer
Bachelor's, Computer Science, Bachelor's, Computer Science at Information Technology UniversityCrescent College, Shadman Lahore
English, Urdu, Punjabi
Github Skills (10)
c1710
kernel10
filesystem10
c1110
linux-kernel10
zfs10
system-programming9
debian-packaging8
version-control4
git4
Programming languages (6)
Github contributions (5)
openzfs/zfs
Mar 2022 - Dec 2022
OpenZFS on Linux and FreeBSD
Role in this project:
Back-end Developer & System Engineer
Back-end Developer & System EngineerContributions:131 reviews, 10 commits, 37 PRs in 9 months
Contributions summary:Umer primarily contributed to the ZFS codebase by implementing and refining core functionalities related to file-level attributes, debug symbols, and the snapshots_changed property. They added support for native Debian packaging and enhanced the performance of zpool trim operations on Linux. Furthermore, the user fixed inconsistencies in how the mountpoint property is handled and updated code to address various issues.
openzfstarballlinuxfreebsdsystem-software
usaleem-ix/zfs
Feb 2022 - Jun 2022
OpenZFS on Linux and FreeBSD
Contributions:11 PRs, 62 pushes, 16 branches in 4 months
openzfstarballlinuxinitramfsgnu
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