About

Taku Yokutou

FullStack Engineer · 6+ Years Experience

Senior FullStack Engineer with 6+ years of development experience and 3+ years using React. Skilled in React, Next.js, TypeScript, Python, Golang, and Cloud Technologies. Experienced in AI integration with LangChain, RAG systems, and ComfyUI. Passionate about automation, open-source, and building tools that boost developer productivity.

# Skills

Languages / Frameworks

TypeScript · JavaScript · Python · Golang · React · Next.js · Node.js · Bun

DevOps & Cloud

Docker · Kubernetes · AWS · GCP · Azure · Vercel · Cloudflare · Terraform · Pulumi · GitLab CI/CD · GitHub Actions

AI & Machine Learning

OpenAI API · Claude · LangChain · LangGraph · RAG / Weaviate · ComfyUI · Whisper / TTS / STT · Prompt Engineering

Frontend

React.js 17/18 · Next.js 13–15 · TailwindCSS · Redux · Zustand · Storybook · Chromatic · Vite

Backend

Node.js · Express.js · FastAPI · PostgreSQL · MongoDB · RESTful API · GraphQL · tRPC · Prisma

Security

HTTPS · SSL · JWT · CSRF · CORS · XSS · 2FA · TOTP

Design & Tools

Figma · Framer · Git · GitHub · GitLab · Nginx · Caddy · Excalidraw

Project Management

WBS · Backlog · Notion · Slack · Teams · GitLab

Languages

English · Japanese (Business Level) · Chinese · Cantonese (Native)

AI-Assisted Dev

Claude / Copilot · AI Code Generation · Prompt Engineering · Codemod · AI-Powered Automation

# Work Experience

2024-09 – PresentCalifornia, US (Full Remote from Yokohama, Japan)

FullStack Engineer

atComfy-Org
  • Leading development of Registry.comfy.org using Next.js, Flowbite, Mixpanel, and react-i18next for fully automated i18n.
  • Built ComfyApi project providing security and node management features using Golang and GCP.
  • Created automated bilingual live-video subtitle tool using Whisper, ChatGPT, and TypeScript (ComfyCon).
  • Built China Python mirror cache service using Aliyun, ObjectStorage, and Caddy for regional availability.
  • Automated GitHub repo cloning/updating, pyproject.toml editing, and PR creation for Comfy-PR with quality checks dashboard.
2022-11 – 2024-08Shinagawa, Tokyo, Japan (Hybrid Remote)

FullStack Engineer

atOneHR
  • Built ChatGAI — a scalable RAG-based chat app with file upload using Next.js, LangChain, and FastAPI.
  • Designed GitLab CI/CD preview framework with Cloudflare Pages and Chromatic/Storybook, reducing manual review time significantly.
  • Developed frontend for Labor Management System (React/Vite/Vitest, TailwindCSS, Axios/react-query).
2022-02 – 2022-10California, US (Full Remote from Shanghai, China)
  • Built a Pomodoro status panel Chrome Extension using TypeScript, React, Redux, Victory.js, and D3.js.
  • Refactored project from Webpack to Vite — reduced compile time from 5-8 min to 30 sec, boosting team efficiency 20×.
2020-11 – 2022-01Shanghai, China (Hybrid)
  • Built daily web scraping system (NodeJS + MongoDB) stable for 22+ months extracting 10+ financial asset sources.
  • Developed data panel with React/FluentUI, intelligent ETL pipelines, and Chrome extension for quick scraping. (alter server: https://www.starhouseventures.com/)
2019-05 – 2019-10Nanjing, Jiangsu, China (Hybrid Remote)

Data Engineer (Internship)

atAiRiA / Chinese Academy of Sciences
  • Transformed Python multi-threading crawler to NodeJS distributed crawler — increased concurrency 50×.
  • Managed Docker cluster deployment and optimized distributed MongoDB + GridFS cluster.

# Education

2017-09 – 2021-06Shanghai, China

Bachelor of Mathematics and Applied Mathematics

Shanghai Institute of Technology

Faculty of Science, Specialization in Financial Mathematics; Minor in Marketing

  • 🏆2019 Mathematical Contest in Modeling (MCM/ICM) — Honorable Mention (International)
  • 🏆2018 Asia-Pacific University Mathematical Modeling Contest (APMCM) — Third Prize (International)
  • 🏆2018 National College 'NXP' Cup Smart Car Contest, Four-wheel Photoelectric Group, East China — Third Prize
  • 🏆2018 Shanghai Creative Robot Challenge, Creative Group — Third Prize
  • 🏆2018 National College Mathematical Modeling National Competition, Shanghai — Second Prize
  • 🏆2017 Led SIT Technical Department — developed LNMP/Express.js system serving ~10,000 students

# Get in Touch

Open to new opportunities, collaborations, or just a chat about technology.