Sangbuem Choo
Builder at Stealth
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolSangbuem Choo is a solutions-focused software engineer and builder with nine years of experience delivering client-facing full-stack and AI-powered systems across Japan and globally. He combines hands-on frontend expertise (React/Next.js/TypeScript) with practical AI integration (LLMs, RAG) to ship production workbenches, on-premise call centers, and rapid prototypes that saved clients significant time and cost. Notable wins include a RAG chat for top Japanese firms, a digital transformation that cut documentation time by ~30% across 70+ elderly-care facilities, and a 7-day AI‑CRM integration that reduced meeting-log effort by ~90%. Comfortable bridging English, Korean and Japanese, he frequently leads bilingual discovery workshops and guest lectures on AI and culture, blending technical delivery with stakeholder empathy. He favors automating repetitive work to free humans for creative problem-solving, and has repeatedly converted ambiguous, high‑volume data challenges into practical features under tight timelines.
9 years of coding experience
3 years of employment as a software developer
Computer Science & Business Management, Environment and Information Studies, Computer Science & Business Management, Environment and Information Studies at Keio University Shonan-Fujisawa CampusComputer Science, 3.67, Computer Science, 3.67 at New York UniversityMaster's degree, Master's degree at Keio University Shonan Fujisawa Campus
English, Korean, Japanese
Github Skills (200)
openapi10
validation10
webui10
ai10
shell10
react-hooks10
electron10
typescript10
forms10
llm10
openai10
react10
editor9
javascript9
calculator9
Programming languages (18)
Github contributions (5)
leochoo/SFC-Bustimer
Oct 2018 - Oct 2020
Hattori Hagino ken project
Contributions:22 commits, 20 PRs, 76 pushes in 2 years 1 month
typescriptken
leochoo/react-vocal-journal
Feb 2022 - Jun 2022
React version of Vocal Journal
Contributions:16 PRs, 72 pushes, 3 branches in 4 months
reactjournaljavascriptvocalreactjs
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