Sungjun Lee
Course Assistant at Columbia University Department of Computer Science
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolSungjun Lee is an AI privacy and security-focused software engineer with 8 years of experience building backend systems and practical security tooling. Currently completing an MS in Computer Science (Security) at Columbia, he researches causal XAI audits for LLM privacy compliance and previously built a DNS exfiltration detector that analyzed 40k+ network queries. He brings hands-on production experience across Python, Java, Go, GCP, and deployed full-stack systems including a Django homestay platform and an LLM app for US Army squad leaders. His background in the ROK Army gives him practical network ops and security policy hardening experience that informs his research-to-production mindset. Equally comfortable teaching—he TA’d AI for Software Security—and shipping product, Sungjun is open to full-time SWE roles from July 2026 and prefers projects at the intersection of security, infrastructure, and AI tooling.
8 years of coding experience
1 year of employment as a software developer
Master of Science - MS Computer Science, Master of Science - MS Computer Science at Columbia UniversityBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Stony Brook University
Github Skills (39)
dataframe9
python9
dataframes9
cs231n9
polars9
rust9
threaded9
bit8
apache-arrow8
subtitle8
model-conversion7
8-bit6
editing6
hybrid6
machine-learning6
Programming languages (4)
Github contributions (5)
gunjunlee/dotfiles
Dec 2019 - Feb 2025
Contributions:132 pushes, 1 branch, 4 comments in 5 years 2 months
kevin970401/Pygmalion
Jul 2017 - Jan 2018
Contributions:22 commits, 20 pushes, 1 branch in 5 months
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