AI Engineer

Hyunwoo Jee.

building the harness teams ship with.

Terry · 지현우//Seoul · remote-friendly

scroll
01 / 03Now

Not a data engineer anymore.
Building at the frontier of AI engineering.

// what I'm doing
01

AI tech standardization

At Hanwha System's AI Tech Team, turning ad-hoc agent experiments into harness patterns the rest of the org can ship on.

02

Frontline research

Living on Claude Code, MoAI, and compound-engineering workflows. Reading every release note, re-reading the ones that matter, writing back what I learn into the team's playbook.

03

Compressing delivery

Embedding into real projects to cut weeks of plumbing down to days — proving the harness with code shipped, not slide decks.

04

Collaborations & track record

Worked across Hanwha Q CELLS, Hanwha Ocean, and Hanwha Group SI — shipping data platforms on Databricks, Snowflake, Cognite CDF, and Airflow running on Azure AKS. Currently in conversations with Mistral AI about what production frontier-model work actually looks like.

agent · live~/harness
// transcriptstreaming
reflex testround 0 / 5

tap to start

click as soon as the screen turns cyan

// how to play
01press start to begin
02wait while the screen is dim
03click the instant it flashes cyan
045 rounds, then your average + best

⚠ clicking before the flash counts as a fault

rounds0102030405
// human reaction floor ≈ 150ms
02 / 03Experience

How I got here.

now2026 —

AI Engineer

Hanwha System · AI Tech Team · Seoul

Standardizing how the org ships with AI. Building harness patterns on top of Claude Code, MoAI, and compound-engineering workflows. Embedding into real projects to cut weeks of plumbing down to days. Talking to Mistral AI and external studios about what production frontier-model work actually looks like.

Claude CodeMoAIHarness EngineeringCompound EngineeringMistralTypeScriptPython
// turnmoved teams in 2026 — the leverage shifted from pipelines to agents.
2022 — 2026~4 yrs

Data Engineer

Hanwha System · Data Platform · Seoul

Four years building and running production-grade pipelines across the Hanwha group — Hanwha Q CELLS, Hanwha Ocean, and Hanwha Group SI. Shipped on Databricks, Snowflake, and Cognite CDF; orchestrated with Apache Airflow on Azure AKS (Kubernetes). The muscle that now informs how I think about agent systems.

Apache AirflowDatabricksSnowflakeCognite CDFAzure AKSKubernetesSparkPythonSQL
2016 — 20204 yrs

B.S. Computer Science

Illinois Institute of Technology · Chicago

Five years in the U.S. before that — the cross-cultural muscle that makes working with international labs and English-language research feel natural.

Computer ScienceAlgorithmsSystems
// languages
한국어 nativeEnglish native中文 fluent日本語 intermediate