Summary
Yumi Ko is a software developer with 10 years of experience building scalable web applications, currently contributing at Clio after roles at Neo Financial, PayPay, and other product-focused teams. She specializes in front-end frameworks like React and Vue as well as TypeScript and backend technologies including Node.js, GraphQL, Nest.js, and Rails. Yumi has shipped features for high-scale products (including work on platforms with millions of users), designed client architectures, and implemented infrastructure automation with Terraform and Kubernetes. She pairs pragmatic engineering—on-call incident handling, observability with New Relic/Kibana, and CI/CD improvements—with a strong testing and quality mindset. A former math tutor with a sociology degree and immersive web development training, she uniquely blends analytical rigor, user-centered thinking, and clear cross-team communication. Always eager to explore cutting-edge web tech, she enjoys mentoring junior engineers and turning ambiguous requirements into reliable, production-ready systems.
10 years of coding experience
7 years of employment as a software developer
Web Development Immersive, Web Development Immersive at General Assembly
Bachelor of Social Science Sociology, Bachelor of Social Science Sociology at Yonsei University
English, Korean, Japanese