Aditya Kumar User

I’m a Blockchain and Full Stack Developer focused on building decentralized applications that are secure, scalable, and ownership-driven. I work end-to-end across smart contracts, wallet authentication, and production deployments, using Solidity and the Ethereum ecosystem alongside modern web tooling.

I’ve delivered Web3 products like TrustCure, an NFT-based supply chain system where I designed and deployed ERC-721 smart contracts for end-to-end NFT product tracking. I reduced manual verification with QR-based blockchain authentication and shipped the full stack using React (Vercel), a backend on Render, and MongoDB Atlas—with a guest access mode for non-wallet users.

I also built BlockBuddy, a blockchain message board featuring an immutable on-chain design with gas-efficient paginated reads. I created a dual-mode UX (no-wallet sandbox plus MetaMask/Sepolia integration) and added a custom SVG visualization that updates in real time with on-chain activity, while keeping the dApp onboarding friction-free. Through my Blockchain Developer Intern experience, I developed and deployed an ERC-20 token and built a DeFi lending workflow (deposit/borrow/repay) using OpenZeppelin, Ganache, MetaMask, and Ethers.js.