Daehun Lee

Frontend Developer & PM

3.5 years of experience in frontend development and product management at mobility and creator economy startups.

Passionate about building user-centric products and proving impact through data.

Work Experience

THE SWING

Mobility platform startup

Product Manager

2025.01 — 2025.02

SWING Transit Card
2025.01 — 2025.02

Industry-first unlimited cashback model

  • Designed unlimited cashback business model and product strategy
  • Defined core features based on user research
SWING TAXI
2025.01 — 2025.02

Ride-hailing service PM

  • Established taxi service launch strategy
  • Designed two-sided platform for drivers and riders

Frontend Developer

2024.08 — 2025.01

SWAP
2024.09 — 2024.12

Subscription-based mobility service

  • Subscribers 800 → 2,700 (225% growth)
  • Monthly revenue +150%
  • Built service frontend with Next.js + Tailwind
SWING BIKE
2024.08 — 2024.12

Shared bicycle service

  • Maintained frontend for ₩20B annual revenue service
  • Legacy code refactoring and performance optimization

EJN (TWIP)

Creator economy startup

Frontend Developer

2021.09 — 2024.06

TWIP 2.0
2023.01 — 2024.06

Donation platform renewal

  • NPS: Creators 94%, Viewers 92%
  • Paid conversion rate 50% → 75%
  • Bundle size reduced by 11%
  • Architected React + TypeScript SPA
Gacha Donation
2022.06 — 2023.01

Interactive donation feature

  • 13,000+ cumulative donations processed
  • 300+ creators adopted
  • Built interactive UI with Canvas API
VOD & CLIP
2022.01 — 2022.06

VOD and clip service

  • Reached 50,000 MAU
  • Paid subscriptions MoM +257%
  • Developed HLS streaming player
Design System
2022.03 — 2022.12

Internal design system

  • Built Storybook-based component library
  • Designed Monorepo (Turborepo) architecture
Events
2021.09 — 2022.03

Event page development

  • Built promotion and event landing pages
  • Optimized conversion with A/B testing

Open Source

vercel/turbo — Contributed to Turborepo build system
gpt-tuning-node — GPT fine-tuning Node.js library

Activities

  • 2023.10 FEConf TWIP Booth Operation
  • 2023 Mock Interview & Mentoring for GSM Students
  • 2020.12 JA Korea Entrepreneur's Playground (ONDO) - Excellence Award

Education

  • 2019.03 — 2022.01 Gwangju Software Meister High School (GSM)