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Senior full-stack blockchain developer delivering secure decentralized systems.

Japan

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What I'm looking for

I seek a collaborative, agile team role building secure, high-performance decentralized applications where I can lead smart contract design, scale backend architectures, and contribute to technical growth.

I am a Senior Full Stack Developer specializing in blockchain technologies with over six years of experience designing, developing, and deploying decentralized applications and web platforms.

I have developed and deployed Ethereum-based smart contracts for DeFi and NFT platforms, implemented wallet authentication, crypto payments, and token-based reward systems, and built responsive DApps using modern front-end frameworks and Web3 libraries.

My work includes architecting scalable backend services, optimizing smart contracts to reduce gas costs, leading a team of four developers on a blockchain supply-chain DApp, and building full-stack applications serving over 50,000 monthly active users.

I contribute to open source blockchain projects, maintain a technical blog on smart contract best practices, and seek roles where I can apply secure, high-performance decentralized solutions in collaborative, agile teams.

Experience

Work history, roles, and key accomplishments

Senior Blockchain Developer

Tokyo Tech Solutions

Feb 2024 - Apr 2025 (1 year 2 months)

Developed and deployed Ethereum smart contracts and DApps for DeFi and NFT platforms, implementing wallet authentication and token-based reward systems to enable secure crypto payments and on-chain interactions.

Solidity Ethereum Next.js Web3.js TailwindCSS

Full Stack Developer

Kyoto Web Innovations

Mar 2022 - Jan 2024 (1 year 10 months)

Built responsive web applications and integrated RESTful and GraphQL APIs using React, Redux, Node.js and MongoDB while collaborating with UI/UX designers to deliver user-friendly experiences.

React Redux Node MongoDB GraphQL REST APIs Web3.js

Junior Web Developer

Osaka Digital Labs

May 2019 - Feb 2022 (2 years 9 months)

Implemented DeFi smart contract features and maintained company web applications, designing an NFT marketplace on Ethereum and optimizing contracts to reduce gas costs by 20%.

Ethereum Solidity JavaScript HTML CSS Smart Contract Optimization Testing Git

Education

Degrees, certifications, and relevant coursework

Tokyo University of Science

Bachelor of Science, Computer Science

2016 - 2019

Activities and societies: Participated in university DApp development, web coding clubs and hackathons; authored technical blog series on Ethereum smart contract best practices.

Completed a Bachelor of Science in Computer Science with a senior project titled "Decentralized Voting Structures & Algorithms, System using Ethereum Smart Contracts."