Jeongho Nah
CEO At SunnyLabs at SunnyLabs Inc.
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolJeongho Nah is a seasoned software engineer and CEO based in Seoul with eight years of experience building high-performance back-end systems, particularly in DBMS internals, compiler optimization, and parallel computing. He led core backend work on Klaytn's Go implementation—refactoring bridge contract logic and adding concurrency controls—after driving blockchain wallet and platform development at Ground X (Kakao). His earlier tenure at TmaxData deepened expertise in database transaction handling, spinlock tuning across architectures, and SQL parallel engines, while Ph.D. coursework at Seoul National University focused on compiler/OS interactions for manycore systems. Comfortable moving between research and production, he combines low-level systems rigor with practical product delivery and has a track record of improving concurrency and recovery subsystems in complex distributed environments. An unexpected thread through his career is his nautical undergraduate background, reflecting a long-standing aptitude for navigating complex systems and teams.
8 years of coding experience
10 years of employment as a software developer
Completed Ph.D. coursework Electrical Engineering and Computer Science, Completed Ph.D. coursework Electrical Engineering and Computer Science at Seoul National UniversityBachelor's degree Nautical Science, Bachelor's degree Nautical Science at Korea Maritime & Ocean University
English, Korean
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
smart-contracts10
contract10
go10
blockchain-platform10
ethereum-contract10
blockchain10
error-handling9
api8
apidoc8
Programming languages (5)
Github contributions (5)
klaytn/klaytn
Jul 2019 - Oct 2019
Official Go implementation of the Klaytn protocol
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 55 commits, 132 PRs in 3 months
Contributions summary:Jeongho primarily refactored and improved the bridge contract code, focusing on the ServiceChain functionalities of the Klaytn protocol. Their work involved refactoring code related to the BridgeTxPool and BridgeInfoList, adding necessary locking mechanisms, and optimizing various bridge-related operations. They also implemented error handling and resolved build errors, which indicates their involvement in the core backend logic of the Klaytn blockchain.
golangblockchainklaytnblockchain-platform
jeonghonah/klaytn
Jul 2019 - Dec 2019
Official Go implementation of the Klaytn protocol
Contributions:2 PRs, 299 pushes, 168 branches in 5 months
golangblockchainklaytn
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.