Hi, I'm Johnathan Mo Johnathan Mo (Jmo).

I'm a CS student at Columbia UniversityColumbia University. I love building software that solves real problems — from AR surgery tools to typing games.

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I've built software across Incoming QSD Intern @ SIG SWE Intern @ Google Research Assistant @ CGUI Lab AR/VR SWE Intern @ NIH Research Assistant @ UMich Cai Lab Research Assistant @ Stanford Optima Group Senior Advisor @ V1 @ Michigan research labs, startups, and big tech, and quant.

A few things I've built: TTabby — Universal AI autocomplete for macOS — Cursor-like ghost text in every text field.Ddrafted.college — AI-powered college essay editing platform — real-time feedback and draft management.AArgue — AI-powered screen time negotiation app — set limits through conversation, not restriction.Llinkedin-semantic — Semantic search engine for LinkedIn connections and profiles.Ttypr — Competitive typing racing app — real-time multiplayer.CComicgen — AI-powered comic generation tool.

I'm studying CS at Columbia Columbia — 3.95 / 4.0 GPA, previously at U-M U-M — 4.00 / 4.0 GPA, and I make videos about CS, projects, and college life YouTube.

4x hackathon winner TreeHacks 2026 TreeHacks 2025 Devfest 2026Bootstrapping Reality 2025

I also post sometimes on GitHub LinkedIn X Instagram Email

On Creativity
2026-02-19
I used to write more when I was young…

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