Hi, I'm Heesun.
I’m a Product Designer based in London, working across B2C products, B2B tools, and VR experiences.
At YMX, I designed interfaces for a B2B VR simulation and a train maintenance dashboard. Before that, at Knowmerce, I worked on fromm, a K-pop messaging platform used by artists and fans. My work included improving reply flows, subscription renewal, and the way users followed conversations.
Working across these different areas has helped me build a strong design background for various services and users.
Before becoming a designer, I started my career as an actress in Korea. My acting background trained me to pay close attention to people’s motivations, reactions, and the context behind their behaviour.
As an actress, I spent a lot of time studying scripts, analysing different situations, and researching characters to understand their motives. Now, I use these skills in my design process.
Work Experience
YMX
UX/UI Designer
Dec 2025 - Jul 2026
Standardised UX/UI for a drug abuse prevention VR simulation and implemented UI assets directly in Unity, achieving over 90% consistency between the design and the developed output
Used generative AI tools to create design variations faster and automate repetitive tasks
Designed a train maintenance scheduling dashboard and used interactive prototypes to support reviews with PMs and engineers
Knowmerce
UX Designer
Jul 2024 - Jul 2025
Led end-to-end UX/UI solutions for “fromm”, a global K-pop fandom platform with 280,000+ subscribers
Led the UX/UI process for the “Reply” feature for artists, reducing response time from 20 seconds to 5 seconds and increasing message volume by 4.6%
Redesigned the subscription renewal journey, increasing subscription conversions by 39%
Conducted user interviews and competitor research to find design insights, sharing findings in team study sessions to improve research quality
Improved design systems and streamlined the design to development handoff process, enhancing team communication and minimising resource waste
Collaborated with PMs and engineers in three-week sprints to align B2B/B2C requirements, formalise the collaboration process, and work efficiently toward a consistent user experience