Yann Collet
Data Compression Expert
Menlo Park, California, United States
Summary
🤩
Rockstar🎓
Top SchoolYann Collet is a data compression expert based in Menlo Park with 13 years of experience and a current role at Facebook. He conceived and maintains the widely used LZ4 and Zstandard libraries, driving open-source compression work that improves storage and transfer efficiency at scale. Trained in telecommunications and satellite networking, he applies large-scale systems thinking to design compact, high-performance algorithms. On GitHub he’s contributed performance-focused improvements such as ARM NEON intrinsics and optimized hash testing in projects like smhasher, showing hands‑on low-level optimization skills beyond algorithm design. His prior roles in satellite deployment and IoT product management give him a rare blend of expertise across constrained networks, embedded platforms, and cloud storage systems.
13 years of coding experience
13 years of employment as a software developer
Engineer's degree, Telecommunications Engineering, Engineer's degree, Telecommunications Engineering at IMT AtlantiqueClasses préparatoires à Pierre de Fermat (Toulouse)Bachelor's degree, Bachelor's degree at Lycée Militaire d'Aix-en-ProvenceIngénieurs, Télécommunications, Ingénieurs, Télécommunications at Ecole nationale supérieure des Télécommunications de Bretagne
English
Stackoverflow
11reputation
280reached
0answers
1question
Github Skills (17)
algorithm10
algorithms10
c-language10
datastructure10
c1110
datastructures10
data-structure10
c1710
neon10
data-structures10
arm10
hash-functions10
hash-function10
c-programming-language10
testing9
Programming languages (18)
Github contributions (5)
rurban/smhasher
Feb 2019 - Mar 2020
Hash function quality and speed tests
Role in this project:
Back-end Developer
Back-end DeveloperContributions:28 commits, 4 PRs, 19 comments in 1 year
Contributions summary:Yann primarily focused on optimizing the performance of hash functions within the repository. They reordered test cases for improved efficiency, prioritizing important tests. Code changes include implementing NEON intrinsics for ARM processors, and improving the performance of existing algorithms. The user also updated test results and made modifications to the hashing algorithm to utilize the `_withSeed` variant.
speedhashsha256hash-functionc-plus-plus
Cyan4973/zstd
Jan 2022 - Jan 2022
Zstandard - Fast real-time compression algorithm
Contributions:9 releases, 5 commits, 9 PRs in 3 days
compressioncompression-algorithmzstandardreal-time
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