Zulkefal z.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I am a blockchain developer specializing in smart contract development with a deep understanding of Ethereum and other EVM-compatible blockchains. My expertise lies in writing, auditing, and optimizing smart contracts for DeFi, NFT, DAO, and Web3 applications. 🔹 What I Offer: ✅ Smart Contract Development (ERC20, ERC721, ERC1155, custom contracts) ✅ DeFi Protocols (Staking, Yield Farming, Liquidity Mining) ✅ NFT Marketplaces & Tokenization ✅ DAO Governance & Voting Mechanisms ✅ Upgradeable Contracts (Proxy Pattern) ✅ Writing comprehensive test cases in Foundry for smart contract security and reliability. ✅ Expertise in restricting smart contracts from being used directly on-chain, ensuring controlled access and security. ✅ Proficient in ECDSA for digital signatures and Merkle Proofs for efficient data verification. ✅ Experienced in deploying The Graph to index blockchain data and automatically store it in databases. 💡 Why Work With Me? Passionate about writing secure, scalable, and well-documented smart contracts Hands-on experience with foundry, OpenZeppelin, Chainlink, and TheGraph I have also participated in smart contract audits, identifying vulnerabilities in real-world projects. I aim to deliver high-quality blockchain solutions that are secure, efficient, and future-proof. Let’s build the future of Web3 together! Message me to discuss your project.