Designing how
people understand
systems
Across digital and spatial environments
Jo Younghee is a UX designer and founder of NINEFIVE, a digital design agency delivering end-to-end experience design across strategy, interface, and emerging technologies. With over two decades of hands-on industry experience, she has led complex, large-scale projects spanning technology, retail, and media sectors, collaborating with global organizations such as Samsung, LG, and Hyundai.
Her expertise lies in structuring user experiences at scale — translating abstract systems, data, and technologies into coherent, intuitive interfaces. She has built and directed multidisciplinary teams across UX, visual design, media, and XR, consistently delivering high-impact digital products and brand experiences.
Extending from this foundation, her recent work expands into XR UX as an advanced research domain. As a PhD researcher in Integrated Design at Yonsei University, she investigates how interaction design principles evolve within immersive environments — focusing on how scale influences perception and behavior in XR, and proposing adaptive interaction mechanisms that adjust sensitivity, distance, visual density, and information representation based on user context. She also teaches UX and interface design at Yonsei University, bridging industry practice with academic thinking.
I design digital experiences that connect strategy, visual systems, and emerging technology. From UX and interface design to motion, spatial media, and immersive environments — translating complex ideas into intuitive visual experiences.
Defining the user journey from research to system architecture. Bridging business goals and human behavior through structured, insight-led design thinking.
Constructing cohesive brand languages — identity, typography, color, and motion — that remain consistent across every touchpoint and medium.
Movement as brand expression. From micro-interactions to motion identity systems — harnessing technology to create intuitive interfaces.
Designing spatial and interactive environments grounded in doctoral research into 3D interface usability — where physical and digital converge.
Designing interfaces where spatial logic meets beautiful detail — balancing visual precision with intuitive usability across platforms.
Crafting movement and dimensionality as the most compelling method of brand expression — cinematic 3D and editorial media design.