Junegunn Choi
Apache HBase Committer at The Apache Software Foundation
South Korea
Summary
🤩
Rockstar🎓
Top School
Top expert inNeovim Ecosystem and Shell Customization
Junegunn Choi is a seasoned data infrastructure engineer and Apache HBase committer with 15+ years building large-scale distributed systems and databases. He led the design and implementation of Kakao’s in-house Hadoop deployment now running 100+ clusters and hundreds of petabytes—replacing a commercial product and saving millions monthly—while operating and tuning mission-critical HBase and Druid fleets. His background spans performance benchmarking of NoSQL systems, scalable ETL and load-testing frameworks, and contributing to open-source projects including widely used tools like fzf and vim-plug. Comfortable across Java, Ruby, and systems tooling, he combines hands-on optimization of core database code with practical automation for large production deployments. Based in South Korea with an MS from Seoul National University, he also maintains a strong streak of popular OSS projects that have grown sizable communities.
15 years of coding experience
17 years of employment as a software developer
Master of Science (MS) Electrical Engineering and Computer Science, Master of Science (MS) Electrical Engineering and Computer Science at Seoul National University
Korean, English
Stackoverflow
1,611reputation
64kreached
12answers
0questions
linux
top-5%
bash
top-5%
Github Skills (66)
hbase10
package-management10
testing10
vimscript10
plugin-development10
databases10
vim-plugin10
graph-database10
ruby10
custom-ui10
javas10
formulas10
neo4j10
regular-expression10
performance-optimization10
Programming languages (19)
Github contributions (5)
junegunn/redis-stat
Jul 2012 - Dec 2016
(UNMAINTAINED) A real-time Redis monitoring tool
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 releases, 123 commits, 5 PRs in 4 years 5 months
Contributions summary:Junegunn primarily contributed to the codebase by making formatting changes and addressing compatibility issues for Ruby 1.8. They also focused on performance optimization, particularly with faster output, and implemented features for handling multiple Redis instances. Furthermore, the user added functionality to handle password authentication and added tests. Overall, the contributions centered around refining the application's core functionality and ensuring its robustness.
redismonitoring-toolredis-monitoringredis-servermonitoring
junegunn/vim-easy-align
Apr 2013 - Jun 2017
:sunflower: A Vim alignment plugin
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 reviews, 282 commits, 9 PRs in 4 years 2 months
Contributions summary:Junegunn primarily contributed to the `vim-easy-align` plugin by implementing new features and fixing bugs related to text alignment. Their work included handling empty lines, lines without delimiters, and adding support for custom alignment rules. The user also added support for shorthand options and regular expressions to the plugin, improving its functionality and flexibility.
vimvim-pluginalignmentsunflowerneovim
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