Lucas Camargo Carvalho

LUCAS CAMARGO CARVALHO Senior Blockchain Engineer | DeFi | Smart Contracts | Web3 Infrastructure Professional Summary Senior Blockchain Engineer with 10 years of experience building and scaling decentralized systems across Ethereum, Solana, and EVM-compatible networks. Expert in Solidity and Rust, specializing in DeFi protocols, DEXs, staking systems, and smart contract security Technical Skills Blockchain & Protocols: Ethereum, Solana, EVM-Compatible Chains, DeFi Protocols, DEX Architecture, AMMs, Liquidity Pools, Staking, Yield Farming, Governance, Oracles Smart Contract Development: Solidity, Rust, Secure Smart Contract Architecture, Gas Optimization, Upgradeable Contracts, Protocol Design, Contract Testing Web3 & Integration: Web3 APIs, Wallet Integration (MetaMask, WalletConnect, Phantom), RPC Providers, Indexers, On-chain and Off-chain Integration Tooling & Frameworks: Hardhat, Foundry, Anchor, Ethers.js, Web3.js, Solana Web3 SDK, CI/CD Pipelines Security & Performance: Smart Contract Audits, Threat Modeling, Static Analysis, Monitoring, Incident Response, High-Throughput Optimization Infrastructure & DevOps: Cloud Infrastructure, Docker, CI/CD Automation, Production Monitoring, Deployment Pipelines Professional Experience OpenSea | Senior Blockchain Engineer Remote, United States | Aug 2023 – Present • • • • Led development of Ethereum-based NFT marketplace infrastructure, supporting high-volume minting, listing, and secondary trading workflows. Designed and maintained Solidity smart contracts for NFT standards, royalty enforcement, marketplace fees, and on-chain governance. Optimized smart contract execution to reduce gas costs for minting, transfers, and bulk marketplace operations. Integrated wallets, indexers, and RPC providers to support reliable NFT discovery, ownership verification, and transaction tracking at scale. • Collaborated with product, frontend, and security teams to ship audited, productionready NFT marketplace features with a strong user experience. Coinbase | Blockchain Engineer Remote, United States | Jun 2020 – Jul 2023 • • • • Built and maintained blockchain services supporting Ethereum and EVM-compatible networks. Implemented secure smart contracts and backend services for custody, DeFi, and onchain integrations. Improved transaction reliability, monitoring, and incident response across production systems. Partnered with legal, product, and security teams to deliver compliant crypto solutions. Solana Labs | Blockchain Engineer San Francisco, CA | Jan 2019 – May 2020 • • • • Developed Solana programs using Rust with focus on high throughput and low-latency execution. Contributed to DeFi primitives including token programs, staking logic, and liquidity mechanisms. Optimized on-chain computation to reduce fees and improve scalability. Collaborated with core protocol engineers and researchers. Chainlink Labs | Smart Contract Engineer Remote, United States | Apr 2017 – Dec 2018 • • • Developed Solidity smart contracts integrating decentralized oracle networks. Supported DeFi applications requiring secure off-chain data feeds and automation. Participated in protocol testing, documentation, and early security reviews. IBM | Software Engineer Austin, TX | Jul 2015 – Mar 2017 • • • Built distributed backend systems for enterprise platforms. Gained early experience with cryptography, distributed systems, and secure infrastructure. Worked within large Agile teams delivering mission-critical software. Education Rice University, Houston, TX Bachelor of Science in Computer Science August 2011 – May 2015