Wonyong Jang
Sr. Data Engineer
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolWonyong Jang is a senior data engineer based in Seoul with 8 years of experience building high-performance data pipelines and backend systems. He has driven major throughput and latency improvements at Coupang—migrating streaming architectures to Spark Structured Streaming and achieving >10x streaming performance and a 97% reduction in batch lead time after converting Hive to Apache Iceberg. At LINE Plus he continues to focus on scalable data infrastructure, combining Kafka, Spark, Airflow and cloud-native patterns to replace brittle API-based integrations. Earlier work includes enterprise Java/Spring systems at Samsung SDS and an academic-rooted interest in applied software engineering from Kookmin University. He publishes code and technical posts on GitHub and a personal blog, signaling a hands-on engineer who documents and automates significant operational gains. Notably, his projects emphasize pragmatic performance wins—turning multi-hour workflows into minutes and micro-batch systems into real-time streams.
8 years of coding experience
6 years of employment as a software developer
학사 컴퓨터 공학(소프트웨어), 학사 컴퓨터 공학(소프트웨어) at Kookmin University
Github Skills (35)
spark-structured-streaming10
expert9
bootstrap9
expert-system9
java9
convergence9
spock-framework9
spring-boot9
densenet9
nodejs9
medicine9
tech-blog9
openapi9
jpa9
docker8
Programming languages (5)
Github contributions (5)
WonYong-Jang/Medical-Expert-System
Apr 2018 - Sep 2021
Medical Expert System Development based on Drools, Ajax and Nginx
Contributions:4 PRs, 20 pushes, 2 branches in 3 years 6 months
nginxdroolsexpert-systemexpertdocker
WonYong-Jang/algorithm
May 2018 - Nov 2020
Contributions:685 pushes, 1 branch, 56 comments in 2 years 6 months
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.