Hermet Park
Principal Engineer at LottieFiles
Seoul, South Korea
Summary
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RockstarHermet Park is a Principal Engineer with 16 years of experience building performance-critical systems across desktop, mobile, web, and game platforms, now leading core systems and Motion Graphics R&D at LottieFiles. He founded ThorVG, a lightweight vector graphics engine adopted by global companies, and shepherds it as a sustainable open-source ecosystem—demonstrating both deep technical design and community growth skills. A longtime contributor and tech lead on Tizen UI/graphics at Samsung and on projects like rlottie and Telegram’s lottieplayer, he combines low-level graphics, UI, and tooling expertise with pragmatic production engineering. His work spans rendering engines, real-time animation playback, and engine tooling for UE4/UE5, highlighting a rare blend of graphics, systems, and full-stack problem solving. Based in Seoul, he pairs curiosity-driven exploration with a track record of shipping scalable, production-ready graphics solutions that create measurable business and developer ecosystem value.
16 years of coding experience
14 years of employment as a software developer
English, Korean, Chinese
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (14)
error-handling10
c-language10
api10
cprogramming-language10
apidoc10
refactor9
image-processing9
refactoring9
file-processing8
file-handling8
fileio8
file-access8
git7
tizen6
Programming languages (15)
Github contributions (5)
Samsung/rlottie
Aug 2019 - Nov 2020
A platform independent standalone library that plays Lottie Animation.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:22 reviews, 40 commits, 27 PRs in 1 year 2 months
Contributions summary:Hermet primarily contributed to the `lottie2gif` tool, adding features for setting resolution and background color. They also made several code refactorings, including removing a global instance and initializing a member variable with a default value. Furthermore, they addressed potential issues in the `stb_image.h` file by adding error handling and memory management. In addition, the user made minor changes to code, such as removing unused functions and return value adjustments.
animationafter-effectsplatform-independentstandalone-libraryindependent
TelegramMessenger/Telegram-iOS
Jul 2018 - Aug 2019
Telegram-iOS
Role in this project:Back-end Developer
Back-end DeveloperContributions:119 commits in 1 year 1 month
Contributions summary:Hermet primarily contributed to the `lottieplayer` library, focusing on features related to animation playback. Their work involved adding and removing functionalities like exceptions and frame rate functions and refactoring the code. They also implemented optimizations, such as deferred updates, and corrected issues with animation rendering, including the proper handling of setPos() and the addition of a forceRender option. Moreover, the user added APIs for set data, frame, and frame-rate to support various features for users.
telegramtelegram-botios
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