Persona 01
Founder
Co-Founder & CTO at Potentivo Lab. I officially launched and now operate Parentlyze — a sustainability-minded parenting-support service — across iOS, Android, and Web.
About / Overview
Hi, I'm Raehyeon Jeong.
Headline
Living Entrepreneurial Life is Beautiful.
I believe a startup is the most beautiful art a human can make, and the greatest force humanity has. Silicon Valley's startups keep changing the world — and they can because they fail more often than any other city dares to. I'm in awe of a startup scene full of pioneers who keep taking infinite shots no matter how many times they fall. I have no intention of ever leaving the scene that creates new value, and I genuinely love building alongside the passionate people in it.
For two years I've helped run Private Meetup at Meetup Lab every four days, so all kinds of people can find and create bigger value more freely. I've taken part in at least 150 meetups while helping operate them.
I love people and I love philosophy — and I believe today's society, Korea's especially, needs to chase sustainability far harder than it does now, and take many more actions for future generations. That's why I build and operate Parentlyze, a service that helps parents so that even one more child can grow up in a better environment.
I studied Electrical & Electronic Engineering at Yonsei University and Computer Science at 42 Seoul, and I love machines, computers, and software. I build countless tools just to use them myself, strapping them on like cyberware. I think I'm doing harness engineering on my own life, borrowing the power of software engineering to pull it off.
Persona 02
Software Developer
Next.js, Flutter, Supabase, FastAPI — frontend to GPU AI servers, payments, and auth, all by hand. I reverse-engineered Yonsei's course-registration mileage backend to serve lookups faster than the official one and drew 17,000 visitors in a week — plus a few NDA-bound projects I can't talk about. I also rebuild OS kernels, interpreters, and renderers from scratch.
Persona 03
Community builder
At Meetup Lab I've helped run startup meetups roughly every four days for two years — learning a ton under my mentor Sun Hwang, an MIT Award hacker. Beyond that: 71st president of the Yonsei EE student council, and four undergraduate years across Roboin (robotics), Drone, PoolC, YCC, CREAI+IT, Founders, and Blockchain At Yonsei.
Now
- ▸Potentivo Lab — Co-Founder & CTO, owning Parentlyze full stack, AI reports, and billing.
- ▸Meetup Lab — operator/member showing up at startup meetups roughly every four days.
- ▸Fjord Edu — running the academy web, booking, and payments stack solo for almost four years.
- ▸Recallink, Cardly Studio, Content Lab and other own-brand experiments running in parallel.
Signals
Primary role
Entrepreneurial Engineer
Stack
Founder + Developer + Hacker + Community Builder
Education
Electrical & Electronic Engineering @ Yonsei University
Computer Science @ 42 Seoul
Meetup Lab
Credentials
Verified facts only. Sourced from the deprecated repo experience page and confirmed by the owner.
- Education2020.02 ~
Yonsei University — Electrical & Electronic Engineering
Hardware, signal processing, and software fundamentals — alongside an unbroken run of student council, club, and 학회 work on campus.
- Education2022.07 ~
42 Seoul (Cadet)
Joined 2022.07. C-based OS, systems, networking, and graphics rebuilt from scratch under peer review.
- Leadership2020.11 ~ 2021.11
Yonsei EE — 71st Student Council President
2020.11–2021.11. Ran the 71st EE student council for a full year — meetings, budget, events, and internal conflict resolution.
- Role2025.06 ~ 현재
Potentivo Lab — Co-Founder & CTO
Owns Parentlyze full-stack, the AI speech server, admin/billing, and multi-LLM routing — every product and technical call.
- Role2022.12 ~ 현재
Fjord Edu — solo full-stack operator
Since 2022.12 — designing, building, and operating the booking, payments, and web stack for the Fjord college-admissions consultancy, alone.
- Community2024.06 ~ 현재
Meetup Lab — member & operator
In startup meetups roughly every four days since 2024.06. Learning a ton under my mentor Sun Hwang (an MIT Award hacker) for two years, building the founder network and operating instinct.
- Community2024.03 ~ 2024.08
Blockchain At Yonsei 13th — ETH Seoul 2024 awards
2024.03–2024.08 13th cohort. Won awards across multiple tracks at ETH Seoul 2024 (March 29–31) with AIM RED, an LLM red-teaming NFT game, for $6,500 in total prizes. Also authored the LUDIUM Solidity learning module.
- Community2024.03 ~ 2024.08
CREAI+IT 1st cohort
2024.03–2024.08 first cohort. Built and deployed FAIM TALK family diary and an early version of the Parentlyze AI parenting advisor.
- Community2024.03 ~
YCC — Yonsei Computer Club
Active since 2024.03. Led the generative-AI study sessions and joined the Node.js study.
- Community2023.09 ~
PoolC — Yonsei Programming Club
Active since 2023.09. Joined various seminars and development projects.
- Community2023.06 ~ 2023.08
Founders 3rd cohort — Demo Day award
2023.06–2023.08 third cohort. Shipped a no-code coffee-chat platform for students and an influencer-AI clone platform — Demo Day award winner.
- Community2021.09 ~ 2024.02
Yonsei Drone Club
2021.09–2024.02. Designed and built drones with Arduino and open-source tooling. Flew in FPV drone competitions.
- Community2020.03 ~ 2024.02
Roboin — Yonsei Robotics Club
2020.03–2024.02. Built walking robots and robotic arms, tuned drone PID with Arduino, and experimented with lightweight YOLO models.
Operating principles
Rules I actually use, not slogans.
- Build to learn — one release teaches more than ten theories.
- Ship on purpose — beta or stealth, it has to reach a real user.
- Hack with curiosity — when the road ends, dig down and rewire it.
- Specialized generalist — frontend, backend, AI, infra. No stopping at any of them.
- Community first — execution speed comes from rubbing against great people often.
- Measure or skip — a hypothesis you cannot measure is one you should not build.
Tech stack
Languages
C/C++PythonJavaScriptTypeScriptSolidity
Frontend
ReactNext.jsReact NativeFlutterThree.jsTailwind CSS
Backend
Node.jsFlaskSupabasePostgreSQLSocket.io
DevOps
DockerAWSGit
AI / Hardware
OpenAI APIClaude APIArduinoMATLAB