<I build and ship products people enjoy using />
AI-driven Full-Stack Engineer
Hi, I'm Kiyoshi Araki. I'm a full-stack engineer who enjoys building real products and taking them all the way to production. My recent work sits at the intersection of modern web engineering and practical generative AI, including LLM-assisted workflows, AI features in the UI, and the backend systems that make them reliable. I'm strongest when the requirements aren't perfectly defined. I can help shape the scope, make sensible trade-offs, and deliver clean, maintainable implementations. If you want a partner who moves quickly while still caring about quality, I'd love to connect.

Tokyo, Japan

Location

7+ years

Experience

50+ projects done

Projects

Notable Projects

WordScenes

WordScenes

WordScenes is a language-learning app that uses Hollywood movies and AI to teach 13 languages through immersive storytelling, with real-time translations, contextual word definitions, and personalized learning pathways. I architected the React Native app with live voice capture, Rive-powered animations, and a hybrid speech-to-text layer that dynamically switches between on-device and cloud inference. I also quantized Hugging Face Whisper models using ExecuTorch and INT8 quantization for offline pronunciation feedback, and built a Japanese NLP pipeline combining JMDict and ichiran for 50,000+ vocabulary entries.

ExpoRivePythonPyTorchExecuTorchWhisperAWS
Zebracat AI

Zebracat AI

Zebracat is an AI video platform that turns text prompts, scripts, audio, or articles into ready-to-post social videos. I led the front-end architecture for the launch with Next.js, TypeScript, and Tailwind CSS, building a scalable component system and Stripe-powered subscription flows. I also engineered PyTorch-based computer vision pipelines for scene analysis and avatar generation, integrated OpenAI and LangChain workflows into the content generation layer, and optimized the FastAPI and Redis backend video rendering pipelines.

Next.jsTypeScriptTailwind CSSFastAPIRedisPyTorchOpenAILangChainStripe
Ashley x Descend Auction Platform

Ashley x Descend Auction Platform

Ashley x Descend is an online furniture auction marketplace from Ashley Canada where prices drop over time and shoppers can either place a bid or grab the item with "Buy Now". I worked on the storefront and core commerce flows (catalog, pricing, checkout, and delivery rules) with Medusa.js, Next.js, TypeScript, and shadcn/ui. I also built the auction logic that powers the live price drops and bid matching, with Node.js, Express, and PostgreSQL on the backend.

Next.jsTypeScriptshadcn/uiMedusa.jsNode.jsExpressPostgreSQL
Job Wizard

Job Wizard

Job Wizard is an AI-powered job search Chrome extension that autofills applications across LinkedIn, Greenhouse, and Workday, plus a job tracker and ATS-optimized resume generation. I built the extension UI with React, TypeScript, and Styled-Components and engineered an intelligent form field-detection system across 100+ job portals. I also integrated a Django REST backend and introduced Jest-based testing, keeping the experience reliable across 10,000+ active installs.

ReactTypeScriptStyled-ComponentsChrome Extension APIDjangoOpenAIJest
Menaji

Menaji

Menaji is a U.S. e-commerce brand for men's skincare and cosmetics. I worked as a full-stack developer on both sides of the stack, using React, TypeScript, and Bootstrap on the front end and Node.js, Express, and MongoDB on the back end. I also integrated Shopify for product management and built a secure payment flow, with a focus on improving conversions and giving customers a more polished shopping experience.

ReactTypeScriptBootstrapNode.jsExpressMongoDBShopify

Education & Work Experience

WordScenes

Jun 2025 - Present

Full-Stack & AI Engineer (U.S.). Shipped on-device AI features and a Japanese NLP pipeline.

Zebracat

Oct 2023 - May 2025

Full-Stack & AI Engineer (Germany). Built and shipped AI video features and core product improvements.

Job Wizard

Aug 2022 - Sep 2023

Full-Stack Engineer (China). Built and maintained an AI-powered Chrome extension.

FOURDIGIT Inc.

May 2020 - Jun 2022

Full-Stack Developer (Japan). Delivered end-to-end features for client-facing web products.

Mahana Corporation

Sep 2018 - Mar 2020

Front-End Developer (Japan). Built responsive interfaces and improved UX across key pages.

Tokyo Institute of Technology

Apr 2015 - Mar 2018

Bachelor of Computer Science

Contact

Best way to reach me is through: kiyoshiaraki.dev@gmail.com

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Built by Kiyoshi Araki • With Next.js 16, TypeScript, shadcn/ui (Tailwind CSS v4) • Deployed on Vercel.