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James Haruki

Web3 Developer

Osaka
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I am James Haruki, a seasoned full-stack engineer from Japan with extensive experience in blockchain, web, and desktop application development. My expertise includes Solidity, Rust, Move, and Go, leading to the successful launch of multiple ERC20 tokens and NFT projects. Notably, I spearheaded the development of a decentralized exchange platform and a wallet-integrated game launcher, enhancing user engagement. My background also encompasses building SaaS web platforms and desktop applications using ElectronJS, Tauri, and PyQt. I am eager to contribute my skills and experience to your team and would welcome the opportunity to discuss how I can add value to your organization.

Careers

Software and Web Developer

Sales Circle

Part time10/2024 -
  1. Developed and implemented scalable and efficient software solutions for Zapier automation, Discord community meeting recording bot using Zapier, JavaScript, Python, Discord.js, FFmpeg, Selenium, AI Agent, YouTube API, Google Auth.
  2. Web applications with CRM utilizing WordPress, GoHighLevel, Stripe, Third-Party APIS and services.
Web3 Lead Developer

Solar Enterprise

Full time01/2024 - 10/2024
  1. Led the Tauri Web3 game launcher project using Linear, enabling digital asset transfers across 9 chains and successfully onboarding over 100 Web3 games using Tauri, React.js, Nest.js, Hapi.js, Node.js, Socket.io, Bridge, Coingecko API, Wagmi, D3.js, Wallet services, PostgreSQL, CI/CD
Blockchain Developer

SolidX

Full time05/2022 - 03/2023
  1. Developed a Cross-Chain AMM/DEX platform from scratch using Cosmos SDK, Bifrost protocol, Maya chain and TSS consensus algorithms.
  2. Created a launchpad site for a new SUI token, FISHCOIN, and FISHNFT using Next.JS, TailwindCSS, Move for Smart Contracts and SUIKit for frontend integration.
  3. Developed a Polygon NFT raffle site from scratch.
Blockchain Full Stack Engineer

MonoXFinance

Full time03/2020 - 01/2022
  1. Front-end development for the DEX platform utilizing in Next.JS, MUI, TailwindCSS.
  2. Back-end infrastructure using Solidity smart contracts and subgraph to facilitate efficient and secure transactions on the Ethereum blockchain.

Education

Osaka University

Computer Science

08/2017 - 02/2020Bachelor's DegreeClass of 2020

My projects

Multi-Chain Game Launcher

portfolio show

Web3 Multi-Chain Game Launcher Platform

Role: Web3 Developer

Completed: 3/2025

Live project: https://tymt.com/

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Skills
NodeGolangJavascriptSolidityRustCryptographyWeb implementationProblem-solvingAlgorithmsBlockchain ecosystem
Experience5-8 years
Hourly rate$35/hr
Open to
remote

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