Available for Technical Leadership & Advisory

Engineering Leader · Data & AI

Turning the next wave of technology
into team results

From music and community services on a global messenger to a 4M-TPS ad platform, a blockchain wallet, a data lakehouse,
and a dev culture where AI agents work as teammates — 18 years on the record.

18+ Years LeadershipDevelopment Team LeadData Lakehouse & Semantic LayerAI Engineering & LLM Agents
Explore Career StoryGitHubLinkedInPeer Reviews
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Engineering Leadership
18+ years leading platforms & services
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Peak Throughput
4M events/sec realtime ad ingestion
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AI PRs Merged
1,200+ AI tasks handled in 6 months
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Label Settlement
LINE MUSIC realtime streaming royalties

The 18-Year Journey at a Glance

2008 –Foundation
Service Architecture

Game servers, messenger community, and music streaming — architecting large-scale B2C services where users spend their daily time.

MySQL ShardingGame ServerLINE Note
2016 –Award Winner
High Throughput & Infra

4M TPS ad collection and LINE Official Account ad delivery server recognized with 2017 Best Engineer Award, plus production blockchain infrastructure.

4M TPSLINE Official AccountAkka-HTTPKafka
2020 –NBoost Award
Lakehouse & Place BI

Iceberg/dbt lakehouse and Place BI (delivering 100+ metrics on Semantic Layer & Canonical integration, 2026 NBoost Award).

Place BI100+ MetricsNBoost Awarddbt SemanticIceberg
2025 –Innovation
AI-Native Engineering

LLM-agent-driven dev automation and an infrastructure measuring AI contribution with data — transforming engineering culture.

Claude CodeAI AgentsMCPAI ROI

Interactive Architecture Showcase

Switch between tabs to explore production-proven system architectures built and operated over 18 years.

AI-Agent-Driven Automation & Contribution Measurement

Automating PR review, issue triage, and internal knowledge search with LLM agents, quantified by metrics

Step 01
Webhook Trigger
Instant event dispatch to Claude Code & agents upon PR creation or issue filing
GitHub Actions · Webhook
Step 02
Context Retrieval
Real-time lookup of internal wiki, Jira, Confluence, and codebase vector index
MCP Servers · Vector Index
Step 03
Action Execution
Automated code reviews, defect detection, test synthesis, and patch preparation
Claude Code · LLM Agents
Step 04
Impact Analytics
Quantifying AI merged PRs (400+) and automated tasks (1,200+) into ROI dashboards
MetricFlow · Tableau
AI PRs Merged:400+
AI Tasks Handled:1,200+
Tech Stack:Claude Code, Anthropic API, MCP, Python, MetricFlow

Apache Iceberg & dbt Semantic Layer Company-Wide SSOT Lakehouse

High-volume log ingestion and serving 100+ core metrics via Place BI & Semantic Layer (2026 NBoost Award)

Step 01
Ingestion & CDC
Zero-loss CDC and event streaming ingestion via Kafka clusters
Kafka · Debezium · Spark
Step 02
Lakehouse Storage
ACID guarantees and partition metadata compaction via Apache Iceberg
Apache Iceberg · S3 / HDFS
Step 03
dbt Semantic & Modeling
Kimball dimensional modeling and Canonical Metric to Binding Metric integration
dbt Core · Semantic Layer
Step 04
Place BI & Serving
Automated verification harness and MetricFlow enterprise SSOT serving for 100+ metrics
MetricFlow · Trino · Place BI
Metrics Served:100+ Core Metrics (Semantic Layer)
Metric Parity:Canonical & Binding Verification
Recognition:2026 NAVER NBoost Award
Tech Stack:Iceberg, dbt, MetricFlow, Trino, Spark, Kafka, Airflow

4M TPS Ad Ingestion & LINE Official Account Delivery Platform

High-throughput distributed event streaming & ad message delivery system awarded 2017 LINE Best Engineer Award

Step 01
Non-blocking Edge & Delivery
Ingesting 4M events/sec and transmitting massive LINE Official Account ad campaigns
Akka-HTTP · Netty · Scala
Step 02
Distributed Queue
Multi-partition Kafka cluster for resilient, zero-downtime buffering
Apache Kafka Cluster
Step 03
In-Memory Aggregation
Real-time ad click/impression billing calculations in memory
Kafka Streams · Redis Cluster
Step 04
Analytics & Storage
Sub-second visual metrics and batch persistence to Elasticsearch / HDFS
Elasticsearch · Kibana
Peak Throughput:4,000,000 TPS
Processing Latency:< 10ms
Recognition:2017 LINE Best Engineer Award

Key Expertise

🤖 AI Engineering

LLM Agents (Claude Code), AI workflow automation, MCP server development, AI ROI measurement infrastructure

Claude CodeAI AgentsMCPPrompt Ops
📊 Data Platform

Iceberg, dbt, MetricFlow, Spark, Trino, Kafka, Airflow, DataHub, dimensional modeling & SSOT

IcebergdbtMetricFlowTrino
⚡ High-Performance Backend

Java, Scala, Python, Node.js, Spring, Akka-HTTP, MySQL Sharding, Microservices

Java / SpringAkka-HTTPMSASharding
☁️ Cloud Native & DevOps

Kubernetes (CKAD), Docker, ArgoCD, Helm, GCP, CI/CD automation, Elasticsearch

K8s (CKAD)ArgoCDDockerGCP

Featured Projects

NAVER · 2025 –400+ AI PRs
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.

Claude CodeAI AgentsMCPMetricFlow
Learn moreMeasuring AI Essay
NAVER · 2020 –2026 NBoost Award
Data Lakehouse & Place BI (100+ Metrics)

Architected and delivered Place BI on the dbt Semantic Layer providing 100+ core metrics as a company-wide Single Source of Truth (SSOT), collaborating with the DA organization and validating Canonical/Binding Metrics to win the 2026 NBoost Award.

Place BI100+ Metrics2026 NBoost AwardApache Icebergdbt Semantic LayerCanonical & Binding
Tech Blog (KR) ↗Learn more
LINE · 2016 – 20184M TPS Award
4M TPS Ad Ingestion & LINE Official Account Delivery

Developed the high-performance ad event collection system handling 4M logs per second (4M TPS) alongside massive delivery servers transmitting ad campaigns via LINE Official Accounts, recognized with the 2017 Best Engineer Award.

4M TPSLINE Official AccountAkka-HTTPKafkaScala / Java
Learn more
LINE Plus · 2018 – 2020K8s & Security
Blockchain Wallet Service & K8s Infrastructure

Developed the crypto wallet service for LINE messenger users, and built production-grade blockchain networks with KMS/HSM-based secure provisioning and Kubernetes node orchestration.

Kubernetes (CKAD)KMS / HSMDockerBlockchain
Tech Blog ↗Learn more
LINE · 2011 – 201660+ Labels
LINE MUSIC — Streaming & Royalty Settlement

Built the service backend end to end, from search engine to streaming APIs, and designed a playback-time-based settlement system on Elasticsearch — delivering time-critical monthly reports to 60+ music labels, without Hadoop.

ElasticsearchStreaming APIJava / SpringSearch Engine
Learn more
NHN / LINE · 2011 – 2016Global Messenger
Community Inside the Messenger — LINE Note

Built a high-volume community board service running inside a global messenger on sharded MySQL. From Naver Japan Cafe onward — the joy of building services users spend time in is the root of my career.

MySQL ShardingRedisJavaHigh Concurrency
Learn more

Peer Reviews Spotlight

"Whenever our project hit a critical phase, he guided the team with clear technical direction and razor-sharp prioritization. His ability to solve complex problems with clean, elegant architectures is exceptional."
N
NAVER Leadership & Peer
Data Platform Colleague
"Engineered an ultra-reliable system in an unprecedented 4M TPS high-throughput environment, winning the 2017 Best Engineer Award. His technical persistence and dedication to team growth build deep trust."
L
LINE Engineering Colleague
Ad Platform Team
"A top-tier engineering leader who rapidly validates cutting-edge technologies (Iceberg, AI Agents) and turns them into core production advantages for the entire organization."
P
Tech Team Lead
AI & Data Engineering
Read All 20+ Peer Reviews ↗

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