seijinkiyoha
From: Japan
Location: Fukuoka, JP
On Useme since 23 December 2025
About me
I’m Seijin, an AI Full-Stack Developer from Japan who loves building products that actually solve problems—using LLMs, modern full-stack development, and scalable AI infrastructure.
My approach is simple: turn messy, real-world challenges into clean, reliable, AI-driven solutions that scale.
I work across the full stack: ✅ Backend: Node.js, Python, FastAPI, Django ✅ Frontend: React, Next.js, TypeScript ✅ AI Engineering: LLMs, Vector DBs, RAG, Embeddings, Fine-Tuning ✅ Infrastructure: AWS, Docker, CI/CD, server performance optimization
I’m obsessed with building 0→1 AI products—systems that feel fast, smart, and intuitive the moment a user touches them. If you’re creating the next wave of GenAI tools, SaaS platforms, or scalable engineering systems, I’d love to connect.