Jeebin Yim —Product Designer
I'm a product designer crafting data-informed, AI-powered learning experiences.
Selected Work
Selected projects where design decisions led to measurable impact — on user understanding, engagement, and conversion.
Ringle AI Analysis
English Proficiency Diagnostic
Designed an AI-powered English proficiency diagnostic system that analyzes real speaking data across Complexity, Accuracy, Fluency, and Pronunciation.
Impact
- 350,000+ diagnostics delivered
- AI report view rate increased to 42%
- Users who viewed reports converted 2–3x higher
Trial Class Booking Flow
Acquisition & Conversion
Redesigned the trial class booking experience to deliver a strong first-session experience and drive paid conversion.
Impact
- Trial-to-paid conversion +17.6%p
- First-payment efficiency +23%
- Average class satisfaction 4.6 / 5
AI Discussion
Speaking Practice Feature
Designed an AI-driven discussion feature that enables learners to practice English speaking without real-time pressure.
Impact
- 26,500+ cumulative AI discussion sessions during open beta
- ~5,300 average monthly sessions (May–Oct 2024)
- Became the foundation for launching a standalone AI Tutor product
AI Tutor
Job-specific English Learning Product
Designed and launched a standalone AI-powered English learning product focused on job-specific communication scenarios. Expanded Ringle's existing AI Discussion feature into a structured learning product with curriculum-based expression learning, AI role-playing, and discussion practice — targeting B2B and cost-sensitive users.
Impact
- 21,600+ new users acquired after launch
- 108,300+ cumulative learning sessions
- Average learning frequency: 2.7 sessions/week
- Monthly new paying users grew by 48.7% on average post-launch
Designing clarity in complex systems.
I'm a product designer with a background in HCI and UX research, specializing in complex, data-heavy products.
My work focuses on designing systems that help users understand their current state, make informed decisions, and take action — especially in AI-powered and learning-focused products.
I believe good product design is not about adding features, but about deciding what to show, explain, or hide — especially when technology becomes complex.
Work Experience
Ringle
Product Designer
Jul 2021 – Dec 2024
Seoul
- -Launched and lead design of AI-based learning product AI Tutor
- -Funnel analysis and design trial lesson application flow, increasing application rate by 28.8%
- -Designed 'AI Analysis' feature for post-lesson English proficiency diagnosis (over 350,000 diagnoses)
- -Conducted multiple beta testing, usability testing, surveys, user data analysis, and collaborated with Interaction Lab, KAIST
- -Designed MVP version of Ringle Teens, a online English tutoring platform for teenagers
- -Analyzed user data on lesson reservations, preparation, and review experience and presented UX data analysis findings company-wide
Naver
Design Intern
Sep 2020 – Nov 2020
Seongnam
- -Internship in NAVER Design Department
Yonsei University
UX Researcher, Office of Research Affairs
Dec 2015 – Aug 2017
Seoul
- -Participated in research projects as UX Researcher
- -Development of an Evaluation System based on User Experience of Interactive Media, Jeonnam Information and Culture Industry Promotion Agency, 2016
- -Development of user-oriented product design support system using cognitive and emotional information, Korea Evaluation Institute of Industrial Technology, 2015 - 2017
Education
Korea Advanced Institute of Science and Technology (KAIST)
Master of Science, Industrial Design
Aug 2018 – Aug 2020
Daejeon, Korea
- -Advisor: Professor Woohun Lee (Wonderlab)
- -Thesis: Designing Screen Peripheral for Mediating Children's Screen Time
Yonsei University
Bachelor of Science, Information and Interaction Design
Mar 2012 – Aug 2016
Seoul, Korea
- -Average GPA 3.94/4.30, Major GPA 3.99/4.30
- -Concentration: UX Research, HCI, Interaction Design
- -Recipient of full tuition Yonsei University Alumni Association Scholarship
Skills
Design
- UX/UI Design
- Wireframe
- Rapid Prototyping
- Conceptualization
- Information Architecture
- QA
User Research
- Usability testing
- Interviews
- Focus Groups
- Participatory Design
- Ethnographic Observations
- Thematic Analysis
Tools
Language
Let's talk about designing meaningful products.
I'm open to new opportunities and collaborations.