Hiroshi Takeru

Developed full-stack web applications with integrated blockchain features using React, Node.js, Solidity, and Web3. Delivered 15 smart contracts on Ethereum and BSC as components of larger web platforms. Architected scalable blockchain solutions that improved transaction throughput by 30% and reduced gas fees by 20% through optimized contract design. Guided junior developers on full-stack development, testing practices, and secure blockchain integration. Collaborated with product, design, and QA teams to ship modern web apps with seamless on-chain/off-chain functionality.

Developed and maintained 50 end-to-end web applications and gaming platforms using React, Redux, Node.js, and modern full-stack tools. Built and optimized PostgreSQL and MongoDB database solutions, improving player data handling and game state processing efficiency by 8%. Participated in code reviews and agile workflows, contributing to improved code quality, faster iterations, and smoother team collaboration.

Built and integrated secure blockchain components within large-scale web applications supporting one of Canada’s major cryptocurrency platforms. Developed production-ready smart contracts from scratch and successfully passed a SlowMist security audit. Optimized contract architecture and backend interactions, improving overall transaction processing speed by 5% in the integrated web system. Designed and implemented an NFT fractionalization feature enabling shared ownership and collaborative actions (sales, auctions, airdrops). Added core NFT marketplace functionality—sales, auctions, and airdrops—using proxy patterns for flexible service-fee handling.