Da-won Lee

Blockchain Developer — building secure smart contracts, Web3 apps, and on-chain tools.

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Professional Summary

A data-driven professional with experience in financial services and a focus on blockchain technologies. I build secure smart contracts and user-friendly Web3 apps. Skilled in Solidity, JavaScript, Python, and familiar with Ethereum tooling and security practices.

Solidity Smart Contracts Security Web3

Projects

Advanced Decentralized Voting App

Smart contracts for elections, React front-end, secure vote tallying.

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English Auction Smart Contract

Manages auction lifecycles, bid validation, and ERC-721 integration for NFTs.

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Smart Contract Security Scanner

Automated checks for reentrancy, integer overflow, and access control issues.

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Skills

  • Languages: Solidity, JavaScript, TypeScript, Python, HTML, SQL
  • Frameworks: Hardhat, Truffle, React
  • Concepts: Blockchain, Smart Contracts, Ethereum, DeFi, NFTs, Web3, Cryptography
  • Tools: Ethers.js, Web3.js, MetaMask, Ganache, IPFS, Slither