Senior Software Engineer · AI Agents & Backend Systems

AI systems,
built to do useful work.

I bring 15+ years of web, mobile, and service development to AI agents, retrieval, and workflow automation. I build the interfaces, execution rules, and recovery paths around the model—and write about the decisions behind them.

Explore selected work → Career profile ↗ Read my books ↗

Updated October 7, 2026 · Independent projects are described separately from employment.

Product experience behind the AI work

Product and team delivery. Led frontend development at CJ Oliveyoung as the team grew from one to four engineers; introduced Next.js and development, review, and deployment practices.

Services from interface to backend. Built mobile trading interfaces and developed, shipped, and operated web, mobile, and real-time services as a startup co-founder and CTO.

Applied AI and technical writing. Now a senior developer on Clush’s Agent Development Team. The work below is independent; it includes tools used in preparing my own technical books.

Selected independent projects

Agent platform

Agent Hub

Document Q&A, research jobs, and review workflows in one console

Agent runtime

QuantSigma Agent Harness

Elixir / Jido / Oban, with version-pinned recovery for earlier Rust and Go sessions

Applied AI workflow

Book Writer

AI-assisted technical manuscript translation and revision

Product engineering

Folio Books

A publishing and reading platform for technical books

Data and execution systems

Stock Trading AI

Market-data pipelines and explicit order-state handling

TRY A WORKING EXAMPLE

Book Writer: protect the manuscript →

Explore missing code, lost headings, and a meaning error that structural checks cannot catch.

Current engineering notes · October 2026

Inside an agent harness

These October 7 articles document the earlier Go and Rust designs. New sessions now use Jido/Oban; the recovery principles still inform the active harness.

Go: reasoning and execution

How Eino hands external operations to a shared execution layer, and what recovery needs when the outcome is unknown.

Rust: replay and typed IDs

Rig state transitions, exact request matching, and the boundary between internal identifiers and a provider’s protocol.

Reading guide on Medium ↗ · Earlier build notes →

Writing from practice · Korean books

Build, verify, explain.

English title translations are shown below. These links open the Korean editions.

Building Tauri 2 Desktop Apps with AI, from Start to Finish

Original title: AI와 끝까지 완성하는 Tauri 2 데스크톱 앱

AI-assisted desktop development: requirements, implementation, verification, and release.

WikiDocs · Free selected chapters ↗

AI Built the Trading System. Who Checks It?

Original title: AI가 만든 자동매매, 검증은 누가 할까?

Reviewing data, backtest accounting, and the assumptions in an AI-assisted Python trading system.