Ratanak Keo

I am a Back-End Developer and Blockchain Researcher with over six years of experience building secure, scalable systems for the banking and fintech sectors. I specialize in core banking APIs, loan origination platforms, and business banking solutions using NestJS, Java Spring, PostgreSQL, and Vue 3. I handle the full development lifecycle, from API design and database optimization to CI/CD deployment with Docker and Jenkins.

My research focuses on blockchain-based supply chain management using Hyperledger Fabric, IPFS, and privacy-preserving technologies. This blend of hands-on engineering and academic research allows me to apply research-grade blockchain and security knowledge to real-world fintech and supply chain problems.