Woonduk Kang
Software Engineer Project Lead at NAVER Corp
Gyeonggi, South Korea
Summary
🤩
Rockstar🎓
Top SchoolWoonduk Kang is a seasoned software engineer and project lead with 13+ years at NAVER, best known as the founder and chief maintainer of the open-source Pinpoint APM project for large-scale distributed systems. He specializes in Java performance tuning, troubleshooting (OOM/thread dumps), concurrent and asynchronous network programming, and JVM agent development, with deep hands-on experience in Netty, HBase binary encoding, and higher-efficiency compression techniques. At NAVER he has led architecture and optimizations for distributed tracing and performance monitoring while contributing widespread bug fixes and security patches across open-source stacks. His work blends systems-level rigor with practical engineering—refactoring core code, improving test suites, and extracting measurable performance gains in production. An active technical writer and speaker, he documents internals and best practices for JDBC, profiling, and APM design, making complex operational knowledge accessible to engineers.
14 years of coding experience
7 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at 서경대학교
Stackoverflow
1reputation
0reached
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Github Skills (8)
javas10
refactoring10
log4j10
refactor10
java10
testing9
performance-analysis8
performance-monitor8
Programming languages (4)
Github contributions (5)
pinpoint-apm/pinpoint
Jul 2012 - Jan 2023
APM, (Application Performance Management) tool for large-scale distributed systems.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:17 releases, 22 reviews, 4938 commits in 10 years 8 months
Contributions summary:Woonduk's commits primarily focus on code cleanup, refactoring, and improvements to the Pinpoint APM project. Their work includes refactoring the code, renaming logger interfaces, and updating and refactoring some of the internal components. The user also contributed to the test module, refactoring its code and making improvements to overall code quality.
distributed-systemsapmmonitoringperformanceagent
emeroad/pinpoint-apm.github.io
Jul 2023 - May 2024
Pinpoint Documentation (https://pinpoint-apm.gitbook.io/)
Contributions:4 pushes in 10 months
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