TOMOYUKI YASUKAWA

About

I am a skilled Fullstack & Blockchain Developer with +6 years of experience in blockchain development, enthusiastic about blockchain and web3 industry, constantly seeking opportunities for continuous learning and growth.

Education

2015 – 2019
Tokyo University of Technology
Bachelor of Computer Science and Engineering
  • Dean's List
  • Graduated with Honors
  • Member of TEDxUTokyo

Social

Work Experience

ZEROTH

Fullstack Developer and core contributor

2024 - 2026

  • Developed and maintained multiple production web and mobile applications as a Full-Stack Developer usingNestJS, Next.js, React, Flutter, React Native, and TypeScript.
  • Built scalable backend services with NestJS and Node.js, including REST APIs, authentication flows, database integrations, business logic modules, admin dashboards, and third-party service integrations.
  • Learned Helm, K8s, Ansible, and Pulumi to orchestrate all infrastructure, deploying 40+ Pulumi resources to CloudFlare and DigitalOcean.
  • Built in-house LLM + RAG chatbot using Claude—with access to docs and smart contract schemas to assist users in using the platform—served through Telegram and Discord bots.
EVRMORE

Blockchain Developer and open source contributor

2022 - 2024

  • Developed and maintained blockchain applications and infrastructure for a UTXO-based DeFi ecosystem, focusing on asset issuance, token transfers, wallet integration, and on-chain transaction workflows.
  • Implemented blockchain features around native asset creation, transfer, and trading, leveraging Evrmore’s protocol-level asset primitives instead of Ethereum-style smart contracts.
  • Integrated web and mobile applications with blockchain services using NestJS, Vue.js, TypeScript.

Neue.ltd

Blockchain Developer

2020 - 2022

  • Developed and deployed secure and efficient smart contracts in Rust and Solidity for various blockchain platforms.
  • Developed a bridge to cross-operate the token on multiple networks by using Cosmos SDK and IBC.
  • Built Collaborated in building and maintain a decentralized exchange(DEX), focusing on user experience and security.
  • Integrated contract using web3.jsin TypeScript ensuring ABI was up-to-date and matched the ABI of the deployed smart contract using "TypeChain"
  • Implemented NFT minting and trading features for a digital art marketplace
  • Ensured the integration of digital wallets and cross-chain compatibility in DApps

GitHub Education

Software Engineering Intern

2019

  • Improved UI and tooling for Rails service, doubling the number of customers that can be onboarded per month.
  • Designed/implemented extensible data pipeline, enabling analysis of data for the first time to improve product experience.
  • Integrated ML into pipeline, removing need to hire 10+ full time contractors for manual customer onboarding.