William Seo
Senior Software Engineer at PayPal
Sunnyvale, California, United States
Summary
👤
Senior🎓
Top SchoolWilliam Seo is a Senior Software Engineer with 12 years of experience building scalable, production-grade systems across logistics, robotics, and web platforms from Sunnyvale, California. He has led core carrier integrations at EasyPost—migrating FedEx from SOAP to REST, enabling default account access for new customers, and designing real-time UPS invoicing—work that directly improved onboarding and billing workflows at scale. Earlier roles include developing the Sally salad robot’s Android and cloud tooling, architecting high-volume REST APIs and embedded firmware interfaces, and co-building marketplace and portfolio platforms at early-stage startups. William blends full-stack fluency (backend services, API design, frontend frameworks, and AWS infrastructure) with hands-on systems thinking and a track record of cross-team collaboration. He’s comfortable supervising distributed teams and shipping secure, maintainable integrations that turn complex partner requirements into simple developer and user experiences.
12 years of coding experience
14 years of employment as a software developer
University of California, San Diego
English, Korean, Spanish
Github Skills (1)
django9
Programming languages (1)
Github contributions (5)
wseo88/wseo88.github.io
Apr 2015 - Jun 2025
Contributions:6 pushes, 1 branch in 10 years 3 months
wseo88/Rotten-Tomatoes
Feb 2015 - Feb 2015
Contributions:15 pushes, 1 branch, 1 issue in 3 days
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