Lukasz Janyst
Software Engineer at Meta
Zurich, Zurich, Switzerland
Summary
👤
Senior🎓
Top SchoolLukasz Janyst is a seasoned software engineer with 16+ years solving high-stakes computing problems from CERN’s petabyte-scale storage and XRootD client to real-time, safety-critical aviation platforms. He blends deep systems expertise—compiler internals, GPU drivers, RTOS and SLAM/computer-vision pipelines—with hands-on leadership, having built and run an R&D platform team and interviewed hundreds of candidates. His work includes designing EOS file catalogs serving tens of petabytes, prototyping the Clang/LLVM-based C++ interpreter used in LHC analysis, and writing low-level AMD Polaris GPU driver code to run OpenCL without an OS. Based in Zurich, he now contributes to AI and compute foundations while consulting through his own firm, bringing a rare combination of production-grade systems engineering and practical research-to-certification experience. A committed test-driven developer and open-source contributor, he has directly improved core XRootD functionality and created robust CI and release processes for widely deployed infrastructure.
16 years of coding experience
14 years of employment as a software developer
MSc Computer Science, MSc Computer Science at Jagiellonian University
Polish, English, French, German
Github Skills (7)
c-language10
cprogramming-language10
testing10
network-protocol9
filesystem9
build-system9
cmake9
Programming languages (10)
Github contributions (5)
xrootd/xrootd
Sep 2010 - Apr 2015
The XRootD central repository https://my.cdash.org/index.php?project=XRootD
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:1621 commits, 9 PRs, 31 pushes in 4 years 8 months
Contributions summary:Lukasz implemented new tests for core XRootD client functionalities, including operations for file location, moving, checksum calculation, directory management, and access token management. The commits added unit tests for IPv6 address parsing and connection handling. The user's contributions also involved enhancing the codebase through the implementation of functionalities like file truncation and various I/O operations, demonstrating a focus on test-driven development practices.
tarballxrootdstorageaixdistributed-file-system
ljanyst/3bmd
Nov 2015 - Apr 2022
markdown processor in CL using esrap parser
Contributions:14 pushes, 12 branches in 6 years 5 months
pegextensibleparsermarkdown-processormarkdown
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