Lukasz Kosewski
Software Engineer at Tailscale
San Jose, California, United States
Summary
👤
Senior🎓
Top SchoolLukasz Kosewski is a seasoned software engineer and founder with 26 years of experience building reliable, full-stack systems from embedded firmware to large-scale distributed infrastructure. He co-founded and led Orbital Electric Systems to push high-quality electric vehicles into underserved markets after hands-on roles at Harley-Davidson LiveWire and Netflix, where he architected rapid AWS region failover. Known for rapid prototyping and robust proof-of-concepts, he combines low-level expertise (kernels, embedded, x86 assembly) with extensive backend and SRE experience. An open-source contributor, his work improving cross-platform stability in the bup backup system reflects a pragmatic focus on portability and resilience. Based in San Jose, he also consults and tinkers across software and mechanical domains, blending entrepreneurial drive with a hobbyist’s curiosity. He holds a Mathematics/Computer Science degree from University of Waterloo and an automotive technician certificate, an uncommon pairing that fuels his EV work.
26 years of coding experience
18 years of employment as a software developer
Certificate of Achievement - Automotive General Service Technician Automotive Engineering Technology, Certificate of Achievement - Automotive General Service Technician Automotive Engineering Technology at De Anza CollegeBachelor Mathematics/Computer Science, Bachelor Mathematics/Computer Science at University of Waterloo
Polish, English, French
Github Skills (14)
windows10
compatibility10
compatible10
filesystem10
backup10
system-programming10
file-operations10
sys10
fileio10
python10
cygwin10
operating-system10
git9
mmap8
Programming languages (5)
Github contributions (5)
apenwarr/bup
Jan 2010 - Mar 2010
Please switch to using the github.com/bup/bup repo instead!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits in 2 months
Contributions summary:Lukasz primarily focused on improving the stability and cross-platform compatibility of the `bup` backup system. Their work addressed issues specific to Windows and Cygwin, including handling file system limitations and differences in system calls. Contributions involved modifying core functionality related to file operations, index management, and caching mechanisms, ensuring the correct behavior of `bup` across different operating systems. They also implemented changes related to how `bup` handles temporary files and file renaming, ultimately improving the robustness of the backup and restore processes.
switch
lkosewsk/aoc
Dec 2018 - Dec 2020
Contributions:14 pushes, 2 branches in 2 years
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