• Designed and scaled core product systems for an early-stage B2B2C SaaS platform, improving operational efficiency and contributing to growth from 0 to 100+ in paid users after platform launch.

• Established UI consistency using the MUI component library, improving design-development alignment and reducing developer handoff time.

• Designed and developed the company’s first official website (mas9.com) using Framer, defining product positioning and core messaging, and implementing a responsive design.

• Redesigned the website structure and content hierarchy to better align messaging with target users’ mental models and clarify the service’s value, resulting in improved app download conversion.

• Translated the entire service platform from Korean to English, adapting terminology for user clarity.

• Restructured web page information architecture to improve content discoverability and navigation clarity, contributing to a 30% increase in organic traffic.

• Translated business requirements into clear user flows and lo-fi wireframes by identifying core user tasks across app and web experiences.

• Collaborated with designers and developers to ensure intended user flows were accurately implemented, identifying usability issues during QA and supporting on-time product launches.

• Assisted in managing social media content and campaign execution.