I build production AI systems end to end, from the model layer to the interface.
Senior Full-Stack & AI Engineer
Hi, I'm Kiyoshi Araki. I'm a senior full-stack & AI engineer with 10 years of shipping production systems across SaaS, e-commerce, and generative AI. I work across the full stack of an AI product: LLM and agent workflows, retrieval pipelines, computer vision, and on-device inference, along with the APIs, data layers, and infrastructure that keep 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
10 years
Experience
10,000+ users reached
Reach
Capabilities
AI & Machine Learning
Front-end
Back-end
Data
Cloud & Delivery
Notable Projects
Nonsense
Nonsense is a language-learning app from WordScenes that teaches 13 languages through Hollywood movies, with real-time translation, contextual definitions, and personalized learning paths. I architected the React Native app and own the speech and on-device AI layer, from offline pronunciation feedback to the Japanese NLP pipeline behind adaptive lessons.
- Quantized Hugging Face Whisper with ExecuTorch to run fully offline on-device
- Hybrid speech-to-text that switches between on-device and cloud inference by network conditions
- Japanese NLP pipeline over 50,000+ vocabulary entries, combining JMDict and ichiran
- Own CI/CD and AWS infrastructure, taking deploys from ~45 minutes to under 10 with zero downtime
Zebracat AI
Zebracat turns text prompts, scripts, audio, or articles into ready-to-post social videos. I led the front-end architecture for the launch and built the generative pipeline behind it, from LLM content workflows to computer-vision scene analysis and the rendering backend.
- Led front-end architecture through launch, including Stripe-powered subscription flows
- OpenAI and LangChain content pipeline that cut production time by more than half
- Held platform SLAs through a major traffic surge without provisioning extra infrastructure
- Owned deployment and release pipelines on AWS and Docker at a weekly shipping cadence
Job Wizard
Job Wizard is an AI-powered Chrome extension that autofills applications across LinkedIn, Greenhouse, and Workday, plus a job tracker and ATS-optimized resume generation. I built the extension UI and the field-detection engine behind the autofill, backed by a Django REST API.
- Intelligent form field-detection across 100+ distinct job portals
- Shipped to 10,000+ active installs
- Introduced Jest coverage that ended recurring regression releases
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, and built the auction logic that powers the live price drops.
- Auction engine powering live price drops and bid matching
- Catalog, pricing, checkout, and delivery rules on Medusa.js
Menaji
Menaji is a U.S. e-commerce brand for men's skincare and cosmetics. I worked across the stack, from the customer-facing storefront to the API and data layer behind it.
- Shopify integration for product and catalog management
- Secure payment flow through checkout
Work Experience & Education
WordScenes
Senior Full-Stack & AI Engineer
Remote · U.S.
Own the speech and on-device AI stack, from offline Whisper inference and a hybrid on-device/cloud STT layer to the Japanese NLP pipeline behind adaptive lessons, plus CI/CD and AWS infrastructure.
Zebracat
Full-Stack & AI Engineer
Remote · Germany
Led front-end architecture for the platform launch, built the LLM and computer-vision pipelines behind automated video generation, and owned deployment on AWS and Docker.
Job Wizard
Full-Stack Engineer
Remote · China
Built and maintained an AI-powered Chrome extension, including the form field-detection engine and its Django REST backend.
FOURDIGIT Inc.
Full-Stack Developer
Minato City, Tokyo
Moved from front-end into full-stack ownership, pairing React and TypeScript interfaces with Nest.js APIs and GraphQL across client products.
Mahana Corporation
Front-end Developer
Shibuya City, Tokyo
Built responsive React and TypeScript interfaces for e-commerce platforms, and helped set the team's front-end review and performance standards.
Tokyo Institute of Technology
Bachelor of Computer Science
Meguro City, Tokyo
Contact
Best way to reach me is through: kiyoshiaraki.dev@gmail.com
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https://www.kiyoshiaraki.online/api/mcpBuilt by Kiyoshi Araki • With Next.js 16, TypeScript, shadcn/ui (Tailwind CSS v4) • Deployed on Vercel.