Sungjun Lee
Senior Software Engineer at Coupang
Seoul, Korea, Republic of
Summary
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SeniorSungjun Lee is a senior software engineer based in Seoul with 9 years of experience building and operating data pipelines for large-scale e-commerce platforms. He specializes in end-to-end ETL—from feeding massive data streams to processing and exposing results to search systems, notably in NAVER Shopping. He is proficient with Elastic Stack for massive indexing, real-time search, and visualization, and has hands-on experience with Hadoop-based ETL and containerized deployments. Since 2021 he has been shaping service engineering at Coupang, focusing on scalable data infrastructure and deployment automation. He holds a BS in Computer Science from Kookmin University with a 3.74 GPA, reflecting a strong foundation in algorithmic thinking and systems design. This combination of data engineering rigor and production-scale delivery makes him adept at turning complex data into reliable search-driven experiences.
9 years of coding experience
Stackoverflow
178reputation
8kreached
10answers
1question
Github Skills (78)
jsoup10
crawler10
elasticsearch10
visualizations10
streaming10
htmlunit10
logstash10
jruby10
search-engine10
mysql10
java10
transport10
etl-framework10
data-structures10
logging10
Programming languages (8)
Github contributions (5)
KMUcapstone2018/Interpreter
Dec 2017 - Oct 2020
Pseudo Code Interpreter Module
Contributions:1 release, 12 commits, 1 PR in 2 years 9 months
pseudointerpreter
occidere/GithubWatcher
Aug 2020 - Oct 2021
Integrated GitHub Activity Notification System
Contributions:4 releases, 1 review, 165 commits in 1 year 1 month
github-activityintegratednotificationsnotificationnotification-system
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