Byunghwa Yun
Software Engineer at 카카오엔터테인먼트(Kakao Entertainment)
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolByunghwa Yun is a Seoul-based software engineer and application architect with 10+ years building large-scale data platforms and high-traffic services for music and mobility products. He has led Melon’s data and recommendation platforms and later drove data platform and image-retrieval services as a tech lead at 42dot, combining hands-on backend engineering with team leadership. His open-source contributions to notable projects like Apache NiFi and SeaweedFS reflect deep expertise in database adapters, pagination, large-integer handling, image processing, and distributed storage optimizations. Comfortable across Hadoop ecosystems and modern cloud-native storage, he focuses on reliable data processing, performance tuning, and pragmatic engineering standards. A detail-oriented problem solver, he often surfaces subtle correctness and performance fixes that improve system robustness at scale.
10 years of coding experience
14 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Korean Educational Development InstituteAssociate's degree, Software Development, Associate's degree, Software Development at Induk CollegeMaster's degree, Software Engineering, 3.9, Master's degree, Software Engineering, 3.9 at The Graduate School of Information & Technology, Sugang University
Korean, English
Github Skills (24)
database-connector10
apache-nifi10
blob-storage10
adaptor10
object-storage10
java10
javas10
database-driver10
go10
sql10
adapter10
data-processing10
distributed-file-system10
mysql9
amazon-api9
Programming languages (8)
Github contributions (5)
apache/nifi
Sep 2016 - Nov 2016
Apache NiFi
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 12 PRs, 9 comments in 1 month
Contributions summary:Byunghwa primarily contributed to improving the Apache NiFi backend, addressing issues related to database interactions and data processing. They implemented support for `orderByClause` in database adapters, fixed a pagination bug in the `GenerateTableFetch` processor, and corrected an issue with `bigint(20)` column conversions. Additionally, they made enhancements to the `ExecuteProcess` processor and resolved a system load average calculation problem. The commits demonstrate a strong focus on improving data handling and system performance within the NiFi framework.
javanifiapacheapache-nifi
seaweedfs/seaweedfs
Jul 2021 - Aug 2021
SeaweedFS is a fast distributed storage system for blobs, objects, files, and data lake, for billions of files! Blob store has O(1) disk seek, cloud tiering. Filer supports Cloud Drive, cross-DC active-active replication, Kubernetes, POSIX FUSE mount, S3 API, S3 Gateway, Hadoop, WebDAV, encryption, Erasure Coding.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 review, 10 commits, 14 PRs in 18 days
Contributions summary:Byunghwa primarily contributed to back-end development, focusing on the SeaweedFS file system. They implemented features like adding webp image type support, modifying image resizing logic, and fixing issues in volume deletion. Furthermore, the user made changes to the MySQL database interaction code and added features like autocomplete and meta log for system management. Their contributions indicate a focus on improving image handling, database interactions, and overall system functionality.
kubernetes-replicationfuseerasure-codingfile-storagedata-storage
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