Builder

Thummar Harshill

AvailableBlockchain & Smart Contractssurat,india$35/hr

About

I am a Full Stack Blockchain Developer with 3+ years of experience building secure smart contracts and production-ready Web3 applications. My expertise includes Solidity, Ethereum, Foundry, Hardhat, Next.js, React, TypeScript, Node.js, viem, wagmi, and Ethers.js. I have developed DeFi protocols, staking platforms, NFT marketplaces, escrow systems, and full-stack dApps with a strong focus on security, testing, and gas optimization. I am looking for remote opportunities where I can build scalable blockchain products and collaborate with high-performing engineering teams.

Skills

Solidity Smart Contracts Blockchain Web3 EthereumFoundryHardhatTypeScript Next.js React.js Node.jsEthers.jsviemwagmiTailwind CSSDeFiNFTREST API

Experience

Senior Blockchain Developer

Self-Employed / Freelance · Jan 2023 to Present

Developed secure Solidity smart contracts for Ethereum and EVM-compatible blockchains. Built full-stack Web3 applications using React.js, Next.js, Node.js, TypeScript, and Ethers.js. Designed and implemented DeFi protocols, staking platforms, NFT marketplaces, and escrow-based payment systems. Developed ERC-20, ERC-721, and ERC-1155 smart contracts using OpenZeppelin, Hardhat, and Foundry. Integrated MetaMask, WalletConnect, Wagmi, Viem, and Ethers.js for seamless wallet connectivity. Wrote comprehensive unit and integration tests using Foundry and Hardhat with a focus on security and regression testing. Optimized smart contracts for gas efficiency and security while following Solidity best practices. Collaborated with international clients through GitHub, code reviews, and Agile development workflows. Worked with Ethereum, BNB Chain, Polygon, Arbitrum, and Base networks.

Education

Charusat University

Bachelor of Computer Applications (BCA), Computer Applications · Jan 2021 to Jul 2023

Graduated with a Bachelor of Computer Applications (BCA). Focused on Software Development, Data Structures, Database Management Systems, Computer Networks, Operating Systems, and Web Technologies. Specialized in Blockchain Development, Solidity Smart Contracts, Ethereum, Web3, React.js, Node.js, and Full Stack Application Development through academic and self-driven projects. Built production-level blockchain applications including DeFi protocols, NFT Marketplace, Escrow Platform, and Web3 DApps.

Projects

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