About

I'm the managing director at Daejeon Jungang Cheonggua Co., Ltd., building systems for agricultural data with AI and code. It started because I liked turning the problems I see on the floor every day into something a computer can answer.

How I got here

I spent about ten years in research at NNFC and KAIST. In 2023 I started using AI tools seriously for the first time, and a lot of my thinking changed. I got the feeling: "I could actually build something with this."

In 2024 I moved to Daejeon Jungang Cheonggua Co., Ltd. Naturally, I started handling the data that piles up there every day — shipment patterns, settlement records, that kind of thing — with code.

I started the "Sapjil Coding" YouTube channel for a similar reason. I like the honest tone of sharing only what I've actually built and used. I'm the kind of person who dislikes overstating things or pretending to know what I don't.

Timeline

2014–2024 KAIST NNFC researcher — MXene synthesis & properties
2023 Started using AI tools seriously for the first time
2024 Joined Daejeon Jungang Cheonggua Co., Ltd. — managing director
2025 Started the Sapjil Coding channel
2026 AI verification papers / open-source security / agricultural data systems

What I'm into now

How do you make an AI system reliable enough to actually trust? That's where most of my time goes lately. The other thread is how to fold code naturally into a place like a wholesale market — somewhere that has run on human hands for a very long time.

The specifics of methods and tools are in the papers and videos. For collaboration or questions, please reach me by email.