Takefumi Ono

Python (FastAPI), TypeScript/Node.js, React/Next.js, Java (Spring Boot), PostgreSQL/MySQL, Redis, GraphQL/REST, AWS, Docker/Kubernetes, CI/CD, OpenAI API, Web3.js. Backend-leaning generalist.

Deepening LLM-powered systems (prompt design, RAG, agents) after building an AI report-generation platform for a financial client, plus expanding Java/Spring Boot backend skills.

Just shipped a solo end-to-end patent-disclosure platform. Now freelancing on web and AI-integration projects.

Freelance/contract full-stack & AI-integration work - architecture, API design, or end-to-end builds. Happy to talk fintech, SaaS or generative AI. Remote-friendly, fast to respond.