Sungheun Wi
Senior Software Development Engineer at Amazon Web Services (AWS)
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolSungheun Wi is a Senior Software Development Engineer based in San Francisco with over 15 years of deep technical experience building and optimizing database engines, particularly in query optimization, query and transaction processing for HANA and other DB systems. He has led database engine teams for 5+ years, including international assignments establishing a query optimizer team at SAP Walldorf and driving Aurora MySQL, Athena (Presto/Trino) and EMR Spark work at AWS. Sungheun combines hands-on systems research—from MVCC and concurrency control to partitioned joins and buffer cache tuning—with pragmatic leadership that ships production-grade engine features at cloud scale. His background spans startup research during a Ph.D. program to architecting core components of enterprise DBMS, reflecting both academic rigor and large-scale engineering. An understated strength is his track record of bridging deep optimizer theory with practical execution in distributed/cloud query engines.
4 years of coding experience
15 years of employment as a software developer
Ph.D candidate in MS/Ph.D integrated program, Computer Science, Ph.D candidate in MS/Ph.D integrated program, Computer Science at Seoul National University
Github Skills (33)
trino10
sql-query10
spark10
data-science10
warehouse10
databases10
big-data10
distributed-systems10
hadoop10
indexing10
jdbc10
analytics10
java10
hive10
snowplow10
Programming languages (1)
Github contributions (2)
sungheun/trino
Jan 2022 - Jan 2023
Contributions:8 pushes, 10 branches in 1 year
hbasebigdatabig-datatrinodatabase
trinodb/trino
Jan 2023 - Jan 2023
Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
Contributions:11 reviews, 1 commit, 10 PRs in 1 day
prestodbdbmsindexingjdbcbigdata
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