Ludvig Michaelsson
Senior Firmware Engineer at Yubico
Greater Stockholm Metropolitan Area Sweden
Summary
🤩
Rockstar🎓
Top SchoolLudvig Michaelsson is a Senior Firmware Engineer based in the Greater Stockholm area with nine years of embedded and firmware experience, currently advancing secure authentication products at Yubico. He brings deep C-level firmware expertise—having progressed from firmware engineer to senior engineer—and a solid academic foundation with an MSc from KTH. Ludvig contributes to high-profile open-source security tooling, notably adding credential management, signature counting, and robustness improvements to Yubico's libfido2 library, demonstrating attention to cryptographic protocol details and reliable device communication. His background includes embedded systems development at Tritech and hands-on teaching roles at KTH, reflecting both practical product delivery and the ability to explain complex technical concepts. Notably, he has improved random number generation and timeout handling in security-sensitive code, a behind-the-scenes contribution that strengthens real-world device resilience.
8 years of coding experience
9 years of employment as a software developer
High school degree, High school degree at RosendalsgymnasietMaster of Science - MS, Master of Science - MS at KTH Royal Institute of Technology
Swedish, English
Github Skills (7)
c1710
c1110
fido10
security10
cryptography9
cbor9
zlib8
Programming languages (6)
Github contributions (5)
Yubico/libfido2
Sep 2020 - Jan 2023
Provides library functionality for FIDO2, including communication with a device over USB or NFC.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:274 reviews, 144 commits, 214 PRs in 2 years 4 months
Contributions summary:Ludvig primarily contributed to the `libfido2` library, introducing new functionalities, fixing bugs, and refactoring existing code. Their work included adding new functions related to signature counting and credential management within the FIDO2 protocol, improving random number generation and ensuring proper return code handling. They also addressed code organization by moving random generation functions to a dedicated source file. The user further expanded the library by implementing support for features like credential management and incorporating various timeout enhancements.
yubikeywebauthnusbcommunicationnfc
LDVG/sway
Sep 2020 - Nov 2024
i3-compatible Wayland compositor
Contributions:4 pushes, 4 branches in 4 years 2 months
waylandcompositorwayland-compositor
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.