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Hi, I’m Hiroshi Takeru, a senior Full Stack & Blockchain Developer passionate about building secure, scalable web platforms that blend on-chain and off-chain workflows. I enjoy turning complex requirements into reliable software while collaborating across product, design, and QA teams to ship modern, user-friendly applications. Over the past 7 years, I’ve delivered Web3-enabled apps and mentored teammates across time zones. I’m a reliable communicator and problem-solver who thrives in fast-paced environments, embraces feedback, and continuously sharpens my skills to stay ahead in the evolving blockchain space.…Hi, I’m Hiroshi Takeru, a senior Full Stack & Blockchain Developer passionate about building secure, scalable web platforms that blend on-chain and off-chain workflows. I enjoy turning complex requirements into reliable software while collaborating across product, design, and QA teams to ship modern, user-friendly applications. Over the past 7 years, I’ve delivered Web3-enabled apps and mentored teammates across time zones. I’m a reliable communicator and problem-solver who thrives in fast-paced environments, embraces feedback, and continuously sharpens my skills to stay ahead in the evolving blockchain space.

Hiroshi Takeru

Full Stack Developer, Blockchain Developer, Web Developer, +2

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Hi, I’m Hiroshi Takeru, a senior Full Stack & Blockchain Developer passionate about building secure, scalable web platforms that blend on-chain and off-chain workflows. I enjoy turning complex requirements into reliable software while collaborating across product, design, and QA teams to ship modern, user-friendly applications. Over the past 7 years, I’ve delivered Web3-enabled apps and mentored teammates across time zones. I’m a reliable communicator and problem-solver who thrives in fast-paced environments, embraces feedback, and continuously sharpens my skills to stay ahead in the evolving blockchain space.…Hi, I’m Hiroshi Takeru, a senior Full Stack & Blockchain Developer passionate about building secure, scalable web platforms that blend on-chain and off-chain workflows. I enjoy turning complex requirements into reliable software while collaborating across product, design, and QA teams to ship modern, user-friendly applications. Over the past 7 years, I’ve delivered Web3-enabled apps and mentored teammates across time zones. I’m a reliable communicator and problem-solver who thrives in fast-paced environments, embraces feedback, and continuously sharpens my skills to stay ahead in the evolving blockchain space.

Available to hire

Hi, I’m Hiroshi Takeru, a senior Full Stack & Blockchain Developer passionate about building secure, scalable web platforms that blend on-chain and off-chain workflows. I enjoy turning complex requirements into reliable software while collaborating across product, design, and QA teams to ship modern, user-friendly applications.

Over the past 7 years, I’ve delivered Web3-enabled apps and mentored teammates across time zones. I’m a reliable communicator and problem-solver who thrives in fast-paced environments, embraces feedback, and continuously sharpens my skills to stay ahead in the evolving blockchain space.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Japanese

Advanced

Work Experience

Web3 Full-Stack Engineer at JBA International

September 1, 2024 - July 1, 2025

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.

Full Stack Engineer at General Gaming

November 1, 2022 - August 1, 2024

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.

Blockchain Developer at Coinsquare

November 1, 2019 - September 1, 2022

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.

Intern at OPT Technologies (OPT Inc)

May 1, 2018 - October 1, 2019

Gained strong knowledge in blockchain and smart contract development. Continued as a freelance developer after the internship, delivering full-stack solutions enhanced with smart contract and Web3 functionality.