Wonjun Chang
Senior Developer at SAP
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolWonjun Chang is a Senior Developer based in Seoul with 8 years of professional experience building systems across in-memory DBMS, mobile, web and Windows platforms. He currently contributes to SAP HANA’s SQL optimizer and new expression engine, bringing deep expertise in SQL query processing, query optimization, and datatype handling. Earlier roles span technical project leadership at SK Telecom—where he led sync frameworks and multimedia service projects—and hands-on engineering from mobile SyncML to internet ad systems. Comfortable in C++, Python and Java, he combines low-level systems thinking with product-focused delivery, often translating research-grade database concepts into production-grade components. A Seoul National University M.S. alumnus, he quietly bridges telecom-scale synchronization work with high-performance database internals.
8 years of coding experience
7 years of employment as a software developer
Master, Electrical Engineering and Computer Science, Master, Electrical Engineering and Computer Science at Seoul National University
English, Korean
Github Skills (17)
xcloud8
xbox8
api4
rest-api3
application-server3
kvm3
linux3
microservices2
before-after2
windows1
monitors1
disable1
application-launcher1
miner1
multiple-monitors1
Programming languages (3)
Github contributions (5)
robincloud/openapi
Oct 2017 - Nov 2017
Contributions:62 commits, 54 pushes, 5 comments in 1 month
apimicroservicesrest-apiapi-serviceopen-api
spikewj/.tmux
Mar 2024 - Sep 2024
🇫🇷 Oh My Tmux! Pretty & versatile tmux configuration / customization made with ❤️
Contributions:7 pushes in 5 months
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