Dennis Fokin
Senior Software Engineer at Yubico
Sweden
Summary
🤩
Rockstar🎓
Top SchoolDennis Fokin is a Senior Software Engineer based in Sweden with 11 years of experience building security-focused systems and cryptographic tooling. He designed enterprise WebAuthn libraries in Java/Scala, developed low-level Python libraries and cross-platform authenticator apps, and contributes to prominent open-source projects for YubiKey management and authentication. His background blends rigorous academic cryptography—published research on pairing-based crypto, secure multi-party computation, and accumulators—with practical engineering for hardware security keys and high-frequency trading systems. Colleagues rely on him for translating complex cryptographic specs into production-grade, thread-safe implementations and improving robustness across platforms. Outside of work he gives technical talks and pursues independent research, combining interests in algorithms, reverse engineering, and physics.
11 years of coding experience
8 years of employment as a software developer
Master of Science (M.Sc.), Computer Science, Master of Science (M.Sc.), Computer Science at KTH Royal Institute of TechnologyRussian Studies, Russian Studies at Stockholm University
Swedish, Russian, English, German
Github Skills (17)
mobile-development10
python10
flutter-apps10
command-line-interface10
fido10
android10
command-line10
error-handling10
flutter-game10
flutter10
debug9
openpgp9
debugging9
ui-design9
front-end-development9
Programming languages (9)
Github contributions (5)
Yubico/yubioath-flutter
Oct 2019 - Dec 2022
Yubico Authenticator for Desktop (Windows, macOS and Linux) and Android
Role in this project:
Mobile Developer
Mobile DeveloperContributions:1 release, 79 reviews, 322 commits in 3 years 2 months
Contributions summary:Dennis contributed to the Yubico Authenticator project, primarily focusing on implementing features and making changes related to the Android platform. They worked on adding functionality to add an account, prompting the user for touch when a YubiKey interaction is required, and including modifications to the UI elements like adding a QR code scanner. They also worked on the setup of the Windows installer and other general cleanup tasks.
authenticatorwindows-desktopyubikeywindowslinux
Yubico/yubikey-manager
Nov 2019 - May 2022
Python library and command line tool for configuring any YubiKey over all USB interfaces.
Role in this project:Back-end Developer
Back-end DeveloperContributions:14 commits, 8 PRs, 28 pushes in 2 years 6 months
Contributions summary:Dennis contributed to improving the functionality and robustness of the `yubikey-manager` library. Their work focused on enhancing error handling in various scenarios, including CCID context initialization and PIN unblocking, which improved the user experience. They made code changes to load libraries properly, including platform-specific handling, and addressed bugs related to the FIDO authentication process. The user's contributions also included changes to the command-line interface, ensuring error messages were displayed correctly and providing additional debugging information.
command-line-toolpython-librarypythonyubikeypiv
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.