CPA · CFA L3 R&D Director at Zenterprize

I’m a CPA who builds things.

Most accountants interpret the tax code. I’ve spent the last several years trying to automate it.

The path here

I started out studying engineering at ICU — now part of KAIST — before eventually landing in business. That early detour into tech never really left me. I’ve been writing code longer than I’ve been filing tax returns, which is an odd thing to say about a CPA, but here we are.

After graduating from Korea University, I joined Samjong KPMG — auditing large corporates, running M&A due diligence, learning how money actually flows through organizations. Good training. But I kept noticing the same thing: the most valuable financial knowledge was locked away from the people who needed it most.

I moved to KDIC (Korea Deposit Insurance Corporation), where I spent eight years investigating failed financial institutions and tracking down fraud. Along the way, I designed the legislation and systems behind Korea’s Wrongful Transfer Return Program — a national policy now used by millions of people who accidentally send money to the wrong account. Writing a law and then building the software to run it is a strange experience. I’d recommend it.

That experience cemented something for me: the gap between good policy and real-world impact is almost always an execution problem. And execution, increasingly, means software.

What I build

Since 2021, I’ve been R&D Director at Zenterprize, leading product development for Bznav — Korea’s leading tax-tech platform.

Some things I’ve shipped:

  • Bznav Sena — AI-powered tax advisory agent. 1.9M MAU, built entirely on organic growth.
  • Bznav Refund — Korea’s #1 corporate tax refund service. 4M registered members. ₩900B in refunds identified.
  • Bznav Care — Automated bookkeeping and tax filing for small businesses.
  • 1min — Freelancer income tax refund service, similar to Samjumsam (Korea’s largest tax refund platform for individuals).

Currently building ZENT Foundation — an AI Agent Platform that connects tax domain expertise with autonomous agents at scale.

The company grew from ₩3B revenue in 2021 to ₩18B in 2024, reaching profitability. Series A (₩30B) → Series C (₩100B).

I also hold a patent for the z-flux engine — an Excel-to-API layer I built so that non-technical tax domain knowledge could plug directly into our infrastructure without going through engineers every time.

What I think about

Tax is one of the most consequential but least understood parts of running a business. Most people overpay, underclaim, or just guess. I think software can close that gap — not by replacing accountants, but by making their expertise accessible at scale.

Beyond work, I’m interested in how AI is reshaping knowledge work, what financial markets are pricing in at any given moment, and the engineering decisions that separate products that scale from ones that don’t.

I’m a workaholic who dreams of having more time to read, think, and do nothing in particular. This site is an attempt at the first two.

Credentials

  • CPA — Korean Institute of Certified Public Accountants (KICPA)
  • CFA — Level 3 Candidate
  • Korea University — B.A. in Business Administration