Builder.

Hi, I'm Sage (Seunghyun) Lee, an AI-native builder who doesn't stop at design. I shape the strategy, prototype it fast, and ship the features too. 3+ years of making ideas real.

Open for new work

What do you see?

Medicai · Cutting onboarding friction for medical imaging SaaS

SaaS Onboarding Healthcare

Dale UI · Building components for a Korean design system

Systems Thinking Accessibility

Playmsg · Turning messages into a playlist

Product Strategy Vibe Coding 0 → 1

Atta systems · Redesigning an e-book product page

E-commerce Information Architecture

Experience

            Advanced AI Data Trainer
            ·
            Invisible Technologies
            ·
            2024 — 2025
          

            Product Designer
            ·
            Atta Systems
            ·
            2023
          

            UX Researcher
            ·
            Hankook Research
            ·
            2022
          

            Program Manager
            ·
            Gabia
            ·
            2021 — 2022
          

            UX Design Assistant
            ·
            Boston Consulting Group
            ·
            2021
          

About

I love to travel, and I live for music and film. Above all, I want to design things that leave a good mark on the people who use them.

TOSS THEM · HOVER FOR A FUN FACT

896

Shot on 35mm

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