Sami Liedes
Software Acoustic Data Science Engineer
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolSami Liedes is a versatile Software Acoustic Data Science Engineer based in Zurich with 14 years of hands-on experience across embedded systems, Linux kernel and driver development, machine learning, and acoustic signal processing. He blends deep systems-level expertise—from optimizing ext2/3/4 filesystem performance to FPGA and electronics design for noise cancellation—with applied data science work in audio and safety-critical domains. Sami has worked at Google, NVIDIA, and multiple startups, and he thrives on mathematical challenges and low-level performance tuning that yield tangible speedups. Equally comfortable prototyping solo hardware-software systems and contributing backend optimizations to well-known open-source projects, he brings a rare mix of research, engineering pragmatism, and curiosity to difficult problems.
14 years of coding experience
9 years of employment as a software developer
Computer Science, Computer Science at Aalto University
Stackoverflow
1,094reputation
19kreached
2answers
17questions
Github Skills (9)
c1710
filesystem10
c1110
performance-optimization10
relationship6
buffer6
constructor6
context-sensitive-grammar6
clang6
Programming languages (20)
Github contributions (5)
tytso/e2fsprogs
Mar 2012 - Mar 2012
Ext2/3/4 file system utilities
Role in this project:
Back-end Developer / Systems Engineer
Back-end Developer / Systems EngineerContributions:5 commits in 12 days
Contributions summary:Sami primarily focused on optimizing the ext2/3/4 filesystem utilities. Their contributions involved moving modulo operations out of hot loops and using 64-bit flags to enhance performance, particularly in filesystem shrinking operations. They implemented a function to find the first zero bit in bitmaps and optimized the bitarray implementation, significantly improving the speed of inode allocation. These changes resulted in substantial performance improvements.
ext2filesystem
sliedes/pawnsonly
Jun 2012 - Mar 2016
Contributions:39 commits, 1 branch in 3 years 10 months
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