AI-Powered Full Stack Developer | React | Node.js | Python | LLM Integration
βοΈ kio.884433@gmail.com | π Portfolio
I build scalable, AI-enhanced web applications that solve real-world problems. With 5+ years of experience in full stack development, I combine modern frontend frameworks, robust backend systems, and AI integration to deliver outstanding products.
I help businesses by:
- Building AI-powered workflows & intelligent search systems
- Developing SaaS platforms with real-time collaboration
- Optimizing backend performance & ensuring scalable architecture
- Mentoring teams in remote environments to maximize impact
βBuilding intelligent systems to make life easier, one line of code at a time.β
Wantedly, Inc β AI-Driven Full Stack Developer | 09/2024 β 10/2025 | Remote
- Built AI-powered web apps with OpenAI API & LLM automation
- Developed SaaS platforms with React, Next.js, Go, Supabase
- Integrated authentication, payment systems, and real-time collaboration
- Optimized rendering & backend scalability
- Mentored junior developers in remote teams
SmartNews β Senior Full Stack Engineer | 01/2023 β 08/2024 | Remote
- Led full stack development for high-traffic analytics & content platforms
- Designed RESTful APIs & microservices with Python, FastAPI, AWS
- Developed responsive frontend with Next.js & Tailwind CSS
- Implemented automated testing & monitoring
Mercari β Full Stack Developer | 04/2021 β 12/2022 | Remote
- Built scalable apps with React, TypeScript, Node.js, PostgreSQL
- Improved operational efficiency via dashboards & API integrations
- Optimized database & caching for better performance
- Enhanced CI/CD pipelines using Docker & GitHub Actions
Osaka University β Bachelor of Computer Science | 2019 β 2022 | Osaka, Japan
Tech Stack: React, Next.js, OpenAI API, Node.js
π‘ Automates content creation & workflow tasks using LLMs.
π View Repository
Tech Stack: React, Go, Supabase, Tailwind CSS
π‘ Real-time collaboration platform with authentication & payment integration.
π View Repository
Tech Stack: Python, FastAPI, PostgreSQL, AWS
π‘ High-traffic analytics platform with optimized backend & REST APIs.
π View Repository
- π Portfolio
- βοΈ seimoroiyoto@gmail.com
- π» Full Stack Expertise: Frontend, backend, database, cloud
- π€ AI & Automation: LLM integration, workflow automation, intelligent systems
- π Scalable Solutions: High-performance, production-ready systems
- π Remote Collaboration: Experience leading and mentoring distributed teams
I help clients turn ideas into AI-enhanced, production-grade applications.