Leo Han
Senior Software Engineer - Team Lead At Xandr
Irvine, California, United States
Summary
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Senior🎓
Top SchoolLeo Han is a Senior Software Engineer and team lead at Xandr with 13 years of experience building backend systems for the TV marketplace and programmatic advertising. He progressed through roles at AppNexus and Xandr after contributing to AdTech products like Automated Guaranteed, focusing on API evolution, analytics, and spend protection. Known for turning complex ad-serving and billing requirements into reliable Java-based platforms, he brings a pragmatic, data-informed approach to stability and integrations. Leo pairs strong academic credentials—a double major in Computer Science and Mathematics (Summa Cum Laude, Phi Beta Kappa) and MS degrees from Columbia—with hands-on product delivery across payments, game backend APIs, and large-scale ad systems. Based in Irvine, CA, he leads engineering teams while staying deeply involved in architecture and code, favoring measurable improvements over flashy rewrites. Outside the obvious, his background in journalism-infused MS studies suggests an uncommon strength in clear technical communication and stakeholder storytelling.
13 years of coding experience
5 years of employment as a software developer
Master of Science, Journalism, Master of Science, Journalism at Columbia University in the City of New YorkBachelor of Art with Summa Cum Laude and Phi Beta Kappa, Double majors in Computer Science and Mathematics, Minor in Economics, 3.81, Bachelor of Art with Summa Cum Laude and Phi Beta Kappa, Double majors in Computer Science and Mathematics, Minor in Economics, 3.81 at DePauw UniversityGithub contributions (5)
puconghan/Python-OpenCV--Image-Processing---Color-Matching-
Jan 2014 - Jan 2014
Contributions:9 commits in 1 day
puconghan/HIV-Data-Visualizer
Nov 2012 - Jan 2014
Contributions:18 commits in 1 year 2 months
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