Hello, I’m
I’m a full-stack engineer who enjoys building fast and accessible web applications.
Always learning and looking for ways to improve, both technically and personally.
Building Ollo Factory, an AI platform that analyses manufacturing work to help factories improve their processes. React/Next.js on the frontend, talking to a Go backend over GraphQL.
Sole developer of three AI-integrated internal tools in three months (3,300+ automated tests), with Claude Code and E2E agents in the core workflow. Built Gemini + RAG automation on an “AI proposes, deterministic code decides” pattern — e.g. a Google Ads engine that cut AI costs ~85% and delivered measurable weekly ad-spend and CPC reductions.
Led frontend architecture for B2B/B2G e-signature SaaS (React/TypeScript). Improved page load ~30% and cut production issues ~40% with automated testing and code-review standards.
My first role in Tokyo — joined the e-signature product team before converting to full-time.
Customized a telecom CRM (TELFLOW) used by 10,000+ end users; cut frontend tech debt ~35% refactoring legacy Angular.
Modernized a legacy money-changer system for a major Indonesian bank — a Laravel back-for-frontend with RBAC, currency-exchange workflows, and reporting across nationwide branches.
Part-time web development on client projects while finishing my degree.
Things I’ve designed and built.
A Japanese vocabulary PWA where AI “friends” I create slip four new words into a daily message, plus AI word capture (Gemini + Jisho), SM-2 spaced repetition, and speaking practice that checks your pronunciation — built for my daily life in Japan.
This bilingual portfolio and blog, including the “Ask about Yudi” AI assistant and a full SEO/structured-data setup. Open source.
Always happy to chat about web engineering, life in Japan, or something you’re building. Drop me a line.