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Hoonseok Kim
Looking for a jobSenior Software Engineer
Senior Software Engineer at Coupang Play who reduced playback buffering by 15%+ and improved video quality by 20%+.
South KoreaSenior Software Engineer at Coupang Play
Experience
Senior Software Engineer
Owned and built backend services and internal web applications for a 9M+ MAU streaming platform, supporting content operations and playback experiences. Launched a traffic management system that reduced playback buffering by 15%+ and led migration of 120K+ content assets to AWS.
Next.jsAWSBackend DevelopmentSystem ArchitectureTechnical MentorshipTraffic ManagementContent Migration
Software Engineer
Designed and built an in-house video processing platform for a new short-form content product, owning system architecture and backend implementation. Built and operated backend systems for a 2M+ MAU live-commerce platform.
PythonGPU AccelerationCloud InfrastructureBackend DevelopmentSystem Architecture
Software Engineer
Developed high-performance backend services in C/C++ for interactive multi-angle sports experiences and led a WebAssembly web application POC for iOS browsers. Worked with Bell/TSN/RDS engineers on a production 5G sports product.
CC++WebAssemblyBackend DevelopmentSports Technology
Software Engineer
Worked within the Web Frontend team, developing JavaScript playback libraries and APIs for consumer experiences across PC web, Chromecast, and Smart TVs. Reduced Video Playback Failure by 90% through client-side failover improvements.
JavaScriptPlayback LibrariesFrontend DevelopmentDebuggingChromecastSmart TV
Software Engineer
Built and customized cross-platform software SDKs for global B2B customers including AT&T, Bell, BT, SKY, and Synamedia. Worked directly with customer engineering teams from technical discovery through integration and production deployment.
SDK DevelopmentCC++Customer IntegrationTechnical SupportDocumentation
Education
Kyung Hee University
Bachelor of Science in Electronic Engineering from Kyung Hee University.