Hi, I’m Shin Sakamoto. I’m a senior blockchain engineer with over 7 years of hands-on experience delivering secure, scalable DeFi protocols and blockchain-based applications across multiple ecosystems. I specialize in Solidity and Rust, with practical expertise on Ethereum, Solana, and Polkadot, building end-to-end solutions from smart contracts to front-end interfaces and off-chain tooling. I’m passionate about designing robust architectures, optimizing security and performance, and mentoring teammates to adopt best practices. I enjoy crafting clear, testable code, implementing automated security audits, and driving adoption of Web3 technologies through collaborative, product-focused development using tools like Web3.js, Ethers.js, and modern frameworks.…

Shin Sakamoto

Hi, I’m Shin Sakamoto. I’m a senior blockchain engineer with over 7 years of hands-on experience delivering secure, scalable DeFi protocols and blockchain-based applications across multiple ecosystems. I specialize in Solidity and Rust, with practical expertise on Ethereum, Solana, and Polkadot, building end-to-end solutions from smart contracts to front-end interfaces and off-chain tooling. I’m passionate about designing robust architectures, optimizing security and performance, and mentoring teammates to adopt best practices. I enjoy crafting clear, testable code, implementing automated security audits, and driving adoption of Web3 technologies through collaborative, product-focused development using tools like Web3.js, Ethers.js, and modern frameworks.…

Available to hire

Hi, I’m Shin Sakamoto. I’m a senior blockchain engineer with over 7 years of hands-on experience delivering secure, scalable DeFi protocols and blockchain-based applications across multiple ecosystems. I specialize in Solidity and Rust, with practical expertise on Ethereum, Solana, and Polkadot, building end-to-end solutions from smart contracts to front-end interfaces and off-chain tooling.

I’m passionate about designing robust architectures, optimizing security and performance, and mentoring teammates to adopt best practices. I enjoy crafting clear, testable code, implementing automated security audits, and driving adoption of Web3 technologies through collaborative, product-focused development using tools like Web3.js, Ethers.js, and modern frameworks.

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Skills

Experience Level

Solidity
Expert
Ethereum
Expert
Rust
Expert
JavaScript
Expert
Web3
Expert
TypeScript
Expert
Node.js
Expert
Docker
Expert
GitHub CoPilot
Expert
Kubernetes
Expert

Work Experience

Senior Blockchain Engineer at OneDex (Ambitious blockchain startup on MultiversX)
April 1, 2021 - June 1, 2023
Led end-to-end development of a cutting-edge DeFi protocol ecosystem on MultiversX, including a decentralized exchange (DEX), bridging capabilities, and an innovative trading platform. Architected scalable on-chain/off-chain interactions, implemented secure smart contracts, and optimized performance for high-throughput environments.
Freelance Full Stack Blockchain Developer at Freelancer
April 1, 2019 - March 1, 2021
Designed and deployed 12+ production-ready Solidity contracts on Ethereum and BNB Smart Chain; built full-stack DApps with React and Next.js; implemented NFT royalties and marketplace features; developed backend services with Node.js/NestJS and data pipelines.
Full Stack Blockchain Developer at VTIVTI (Vietnam Telecommunication International)
November 1, 2016 - March 1, 2019
Developed full-stack blockchain-enabled telecom solutions; implemented backend services, smart contract integration, and database architecture; contributed to product roadmap and architecture decisions.

Education

Bachelor's degree in Computer Science at Kyoto University
January 1, 2012 - January 1, 2016

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Telecommunications, Financial Services, Gaming, Media & Entertainment
    paper Saturday Quiz Time

    https://www.twine.net/signin
    A consumer-facing quiz and puzzle platform that started as an SMS-only product and scaled to over 15,000 users.

    -What it does:
    Delivers quizzes, puzzles, and casual games designed for short, repeat engagement.
    -Tech stack:
    Astro + Vue.js + Supabase