Hello, I'm
Hagen Bui
Product Designer
"You are the light. It's not on you, it's in you." -Bonita Smith
About me
"Creating business value via user-centricity, backed by experience."
With 6 years in Mobile Game/App design (3 as UI/UX designers), I've led UI/UX efforts for over 15 applications. My primary focus is translating user needs and business objectives into clear, high-quality interfaces and effective interaction patterns. I enjoy experimenting with new tools and visual concepts—like building this basic Framer site in a single Sunday—while always maintaining a strong foundation in core visual design and usability principles.
Selected works
Featured work from 15+ shipped and WIP products. NDA limits details; further discussion is welcome.
another-LLM-aggregator
A self-initiated AI chat app concept designed to rigorously test the custom-built 'Ratius' Design System and tackle advanced interaction design challenges within complex AI chat use cases.
Revoto
Revoto, an AI photo enhancer, helps users restore damaged, blurry, or pixelated photos with just one tap.
AI Writer
AI Writer is an AI writing assistant app that helps casual users bypass complex prompting via curated templates and an intuitive UI.
Ratius
My personal Design System currently under development, leveraging Figma variables. Its core goals are ease of adaptation and scaling per project, balancing standardization with customization & aesthetics, and robust support for screen sizes.
Designer's Notes (WIP)





