Yeongpyo Ku
Frontend Developer at Viva Republica (Toss)
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolYeongpyo Ku is a frontend developer with 12 years of engineering experience and three years focused intensively on modern web and hybrid app frontends, currently building at Viva Republica (Toss). He specializes in optimizing large-scale applications—cutting bundle sizes by up to 50%, improving Web Vitals, and boosting deployment and runtime performance through CI/CD and infrastructure work. Yeongpyo has led major refactors and established design systems, test coverage, monitoring, and developer tooling (CLI, TypeScript generators, reusable workflows) that materially increased team productivity. He blends hands-on frontend craft with backend and ops skills—migrating clouds, setting up ArgoCD and self-hosted runners, and running both on-premise and cloud environments. Known for turning outsourced, hard-to-maintain codebases into stable, testable platforms, he also builds small yet impactful services in Rust and Go to solve integration and delivery problems. Based in Seoul, he pairs a practical, metrics-driven mindset with a readiness to learn new tech to solve thorny production issues.
12 years of coding experience
3 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Korea National Open University
Korean, English
Github Skills (53)
discord-bot10
discord-js9
discord9
ffmpeg9
converter9
youtube9
browser9
react9
thumbnails9
nextjs8
stash8
gulp8
javascript8
nodejs8
typescript7
Programming languages (11)
Github contributions (5)
marshallku/About-IU
Jun 2020 - Aug 2022
Contributions:211 commits, 8 PRs, 161 pushes in 2 years 2 months
reactjsreactfan-page
marshallku/react-postscribe
Aug 2022 - Apr 2024
Contributions:13 releases, 32 pushes, 1 branch in 1 year 8 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.