Engineering Leader · Data & AI

Turning the next wave of technology
into team results

4M requests per second, production-grade blockchain infrastructure, an Iceberg & dbt data lakehouse,
and a dev culture where AI agents work as teammates — 18 years on the record.

18+ YearsDevelopment Team LeadData PlatformAI Engineering
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The Journey at a Glance

2008 –
Scale

From game servers to a global messenger — fundamentals of high-traffic systems

2016 –
Performance

4M TPS ad platform, Best Engineer Award, and production blockchain infrastructure

2020 –
Data

Iceberg/dbt lakehouse and a semantic layer standardizing company-wide metrics

2025 –
AI

LLM-agent-driven dev automation and an AI-native team culture

Key Expertise

AI Engineering

LLM Agents (Claude Code), AI workflow automation, MCP, AI contribution measurement

Data Platform

Iceberg, dbt, MetricFlow, Spark, Trino, Kafka, Airflow, DataHub

High-Performance Backend

Java, Scala, Python, Node.js, Spring, Akka-HTTP, MSA

Cloud & DevOps

Kubernetes (CKAD), Docker, ArgoCD, Helm, GCP, Elasticsearch

Featured Projects

NAVER · 2025 –
Building an AI-Native Dev Culture

Automated code review, issue operations, and internal knowledge lookup with LLM agents, and designed infrastructure that measures AI contribution with data — 400+ merged AI-authored PRs and 1,200+ AI-driven tasks within six months.

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NAVER · 2020 –
Data Lakehouse & Semantic Layer

Built an Iceberg/dbt-based lakehouse and standardized company-wide metrics through dimensional modeling and a MetricFlow semantic layer BI. A realtime abuse-detection system raised service trustworthiness.

Tech blog (KR)
LINE · 2016 – 2018
4M TPS Ad Platform & Best Engineer

Developed a high-performance ad event collection system handling 4M logs per second, recognized with the 2017 Best Engineer Award.

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LINE Plus · 2018 – 2020
Blockchain Infrastructure & K8s Orchestration

Built and operated production-grade blockchain networks with KMS/HSM-based secure provisioning and Kubernetes node orchestration.

Tech blog
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