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Joohyun (CJ) Cha

Founder

Founder at Dawn Industries

San Francisco Bay Area

FoundedDawn Industries · YC

Find your path to Joohyun

422 people in our graph share verified history with Joohyun — schools, employers, funds. One of them is your warm intro.

Garry TanunlockedJoohyun: together at Y Combinator (2026)
×11Joohyun: together at Y Combinator

About

Joohyun (CJ) Cha is the founder of Dawn Industries and previously co-founded and served as CTO of Zipper, a collage-based social media app that was acquired by MetaZone. Earlier, Cha worked as an ML engineer at Avalo analyzing genomic data for crop development and studied computer science at Brown.

Founder at Dawn IndustriesYC S26

Intro paths

YC

Joohyun went through Y Combinator (Summer 2026) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Dawn Industries's batch and knows the company first-hand. YC profile ↗

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In turn, Joohyun can intro founders to Dawn Industries's investors below.

Dawn Industries's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2026

Co-founders at Dawn Industries

RLRobin Lee
Robin LeeCo-Founder & CTO

Experience

  1. Dawn IndustriesFounder & CEOcurrent2025 — presentSan Francisco Bay Area

Skills & more

Swift (Programming Language)1PyTorchMachine LearningPython (Programming Language)TensorFlowC++

Languages English · Korean

From Joohyun's professional profile.

Frequently asked questions

Who is Joohyun (CJ) Cha?
Joohyun (CJ) Cha is the founder of Dawn Industries and previously co-founded and served as CTO of Zipper, a collage-based social media app that was acquired by MetaZone. Earlier, Cha worked as an ML engineer at Avalo analyzing genomic data for crop development and studied computer science at Brown.
Where does Joohyun (CJ) Cha work?
Joohyun (CJ) Cha is Founder of Dawn Industries.
What companies did Joohyun (CJ) Cha found?
Joohyun (CJ) Cha founded Dawn Industries.
Where did Joohyun (CJ) Cha go to school?
Joohyun (CJ) Cha studied at Brown University (Bachelor's degree, Computer Science); Y Combinator (S26); University of Illinois Urbana-Champaign (Bachelor of Engineering - BE, Computer Science).

Founder mafias

Same school

Shared employers