John Jung

I’m John. I build AI systems and small, useful products.

My work spans cosmic-ray research, clinical bioinformatics, email infrastructure, and AI engineering.

Today I work on AI engineering at MGX. Its first fund closed with $49 billion in commitments and its portfolio includes frontier AI labs such as OpenAI, Anthropic, and xAI, alongside semiconductor and data-center investments.

Background

Work history.

Early work
NASA Goddard / University of Maryland
Built and analyzed cosmic-ray data systems, where the work was mostly about signal, noise, instruments, and patience.
Clinical data
NYU Langone / University of Rochester
Graduated at 19, then spent several years on clinical and research bioinformatics datasets, contributing to 30+ publications.
Product studio
Pith Studio
Built product work for startups and larger companies, including Fortune 500 client work, with a focus on making rough ideas usable.
Co-founder & CTO
June.ai
I co-founded June.ai and served as CTO, building an AI-first email app.
Acquisition
Nylas
Nylas acquired June.ai in 2020. I joined Nylas after the acquisition and worked on email and productivity infrastructure.
Now
MGX
Working on AI engineering at a global investment firm focused on frontier AI, semiconductors, and data centers.