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JAEYONGBAE
EN/KR

Jaeyong Bae

I'm a design engineer based in Seoul. I work from UX and design systems through frontend, data and AI, and I stay with the product after launch to learn from how it actually gets used.
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About

How I work

  1. 01

    Design

    Research, information architecture, interaction and design systems.

    Figma

  2. 02

    Build

    Frontend and prototypes, written myself, paired with AI.

    Claude Code

  3. 03

    Ship

    Deployment, the instrumentation that follows it, and running the thing.

    Cloudflare

  4. 04

    Measure

    Behaviour data and validation decide what stays and what goes.

    GA4 · Clarity

Experience

Reevl, Founder & Design Engineer2026.04 – Present

  • Designed, built and launched a property-intelligence product solo, covering 45,695 apartment complexes across 255 Korean districts
  • Built the product end to end across research, information architecture, design system, frontend, data pipelines and operations; launched publicly in Jul 2026
  • Published a read-only MCP server for AI tools and removed or constrained forecasts that failed walk-forward validation rather than presenting unsupported precision
  • Grew the live product past 7,000 monthly active users (GA4 30-day active users, measured 2026-10-09)

Hongik University, Undergraduate Student Researcher2026.08 – Present

  • UX/UI researcher on an industry–academia project designing the teleoperation HMI for an underground-parking patrol robot
  • Led screen design for the base-layout track: 20 final screens and 30 components on a fixed 1920×1080 control-room display
  • Defined the information hierarchy around camera awareness, vehicle state, warnings and licence-plate recognition workflows; merged two parallel design tracks into one 220-token system and bound 431 hard-coded colours back to tokens
  • Worked from literature, industry cases, technical meetings, stakeholder feedback and usability testing; preparing a second validation round using eye-tracking, with partner technical details confidential

Republic of Korea Air Force, Brand Designer, HQ Media Content Division2023.10 – 2025.06

  • Designed official social content, event materials and physical goods for a 60,000-person organisation and a YouTube channel with 100M+ cumulative views
  • Designed F-4 Phantom retirement goods and co-planned "Finding the Phantom," which reached 400K views; the division received the 2024 Air Force group award
  • Used Midjourney, ElevenLabs and Sora in official production, presenting generated variants side by side so non-design stakeholders could decide on visible evidence
Selected projects

SAI, An AI colleague that does the work first2026.09

An AI colleague that does the work a meeting needs before anyone asks – it transcribes the room live, reads the context, and researches, compares and calculates, so people can keep talking and pick what to keep. In a team of three I did the UX, the design system and the frontend.

  • Designed the suggest → accept → note flow and the design system for a meeting AI and built the frontend (team of three; 32 Playwright tests, WCAG 2.1 AA)
  • Demonstrated on live models, a real browser and a database – quotes compared, budgets recalculated on a follow-up, chosen items saved

Glide, Motion-sickness relief for autonomous rides2026.04 – 2026.06

A motion-sickness relief system for autonomous cars that warns riders 2–7 seconds before the car moves so their bodies can brace – with one sickness metric implemented identically on a sensor board, a web console and an iOS app.

  • Designed and built a motion-sickness system solo – sickness figure down 77% (simulation)
  • Intervention scaled to severity across 13 steps, from a suggestion to acting and saying so – the trade between time and comfort stays the passenger's

Kankan, A subway car crowding mini-app2026.05 – 2026.09

When every route app shows the fastest way, Kankan shows the car where you can sit. A Toss mini-app I planned, designed, built, got through review and run on my own.

  • Planned, built and shipped a Toss mini-app solo, at zero running cost
  • Cross-checked public data across two sources – 77 disagreements corrected by hand, 456 verified records bundled statically so no wrong number goes out live
Education

Hongik University, BA, Visual Communication Design2021.03 – 2027.02

Merz Akademie, Exchange, Visuelle Kommunikation2025.09 – 2026.02

Hyundai High School, 2018.03 – 2021.02

Skills

DesignProduct Design, UX Research, Interaction Design, Design Systems, Prototyping

Engineering (AI-assisted)TypeScript, React, Next.js, Tailwind, SwiftUI, Arduino

AI / DataAI Product Design, AI-assisted Development, n8n, Data Pipelines, GA4

VisualFigma, Photoshop, Illustrator, InDesign, After Effects

Awards

Air Force Honour (division group award), Air Force2024

Activities

HYUNDAI MOTOR GROUP UX Studio Seoul, Research Crew, infotainment usability research2026.03

Languages

Korean – native

English – professional, TOEFL iBT 93 · TOEIC Speaking IH2024.10

German – elementary, exchange at Merz Akademie2026.02

Certificates

Google Analytics Certification (GA4), ID 1793384982026.04

Global experience

Germany, exchange at Merz Akademie, Stuttgart2025.09 – 2026.02

United Kingdom2010.01 – 2012.12

Spain2009.07 – 2010.01

Design judgment

Where a screen looked finished and the evidence said otherwiseSix decisions from products that are running: what the evidence was, what changed, and what it cost.

Links

Email

GitHubgithub.com/exclusiveyon-a11y

LinkedInwww.linkedin.com/in/jaeyong-bae-1795992b7

Documents

  • CV

    Work, study and the projects that carry it

    1 pagePDF

  • Resume

    Cut to the role applied for

    Written for the roleOn request

  • Cover Letter

    Written for each company and role

    1 pageOn request