Takeru Hiroshi

Hiroshi Takeru Full Stack & Blockchain Developer Profile Skills I am a senior WEB developer with enough experience in full-stack web and mobile app development, as well as in blockchain technology. Over the past 6+ years of my developer’s career, I ‘ve gained rich experience across a variety of frontend & backend projects. And in recent years, I have specifically focused on Blockchain and Cryptocurrency development. In addition to my technical skills, I take pride in being reliable & punctual promise-keeper and successful communicator with international clients. The other properties that you can expect me to have: ✓ A strong challenger with time & conditions ✓ Hard-working, working full-time (40 hours per week) ✓ Comfortable cooperating across time zones ✓ Client-oriented, focusing on dedication & advancements One thing I can assure you is that communicating and working with me will be a guided and reliable experience, leading us into successful collaboration. Employment History HTML/ CSS/ JavaScript React/ Redux/ React Native Vue.js/ Vuex Python Node.js Angular 10/ Next.js GitHub Solidity/ Smart Contract Oracle/ Web3.js/ NFTs Blockchain & Cryptocurrency Developer at JBA International — Los Angeles (Remote) Sept 2024 — Jul 2025 ● ● ● ● Dapp/ DeFi BTC/ Ethereum/ BSC Designed, developed, and deploy over 15 smart contracts on Ethereum and BSC and Dapps using Solidity and other blockchain technologies. Architected scalable blockchain solutions that improved transaction throughput by 30% and reduced gas fees by 20% through optimized contract design. Mentor junior developers and guide best practices in blockchain security, testing, and development workflows. Collaborate closely with cross-functional teams, including product managers, UX designers and QA for blockchain products. Details Toronto, Ontario, Canada-Nationality Japanese Full Stack Engineer at General Gaming — Boston (Remote) Nov 2022 — Aug 2024 ● ● ● Developed and maintained 50+ end-to-end web apps and gaming platforms using full stack technologies, especially with React.js, Redux and Node.js. English Implemented database solutions with PostgreSQL and MongoDB to manage player data and increase game state processing efficiency by 8%. Japanese Participated in code reviews and agile development processes, contributing to continuous improvement of team workflows. Blockchain Developer at Coinsquare — Toronto, Canada Nov 2019 — Sept 2022 ● ● ● ● ● Languages Designed and deployed secure blockchain solutions supporting one of Canada’s largest cryptocurrency exchanges. Developed whole smart contract from scratch and passed the Audit from Slow Mist. Improved transaction processing speed by 5% through optimized smart contract development. Implemented NFT fractionalization so that users are able to co-won NFT and decide further steps like sale, auction, airdrop together. Implement basic functionalities of NFT Marketplace such as sale, auction, airdrop and used proxy for service fee calculation. ssss Intern at OPT Technologies (OPT Inc) — Japan May 2018 — Oct 2019 ● Got some rich and deep knowledge about blockchain development. ● Worked on various solidity projects that you could find in GitHub. ● After 1 year worked as a freelancer to be more professional. Education McGill University — Montréal, QC, Canada Bachelor of Science (B.Sc.) in Computer Science Apr 2014 — Mar 2018 ● GPA: 3.1/3.3 Coursework: AI, Algorithms & Data Structures, Cryptography, Distributed Systems, Database Systems ● Activities: Participated in university hackathons and blockchain seminars ● Pursued a Generalist Scholars grant to study software architecture ●