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L AN C E M U L L I N SSenior Blockchain EngineerCanyon Lake, TX PHONE NUMBER AVAILABLEEMAIL AVAILABLESUMM AR YSenior blockchain developer with over 6 years of experience in software development,developed, tested, audited, and deployed smart contracts for the Web3 gaming ecosystemincluding NFT marketplaces, token contracts, bridges, DEX infra, account abstraction, andchain abstraction, successfully launched DeFi protocol for Web3 gaming using customtokenomics and ICO/IDO.SKILLS AND AB IL IT IESSolidity, Rust, Javascript, Typescript, Golang, Python, C++Hardhat, Foundry, Web3.js, Ethers.js, OpenZeppelin, Solana CLI, Anchor, SPL-TokenTokenomics, Biconomy SDK, NEAR Protocol, Proxy, Mythx, SlitherHTML5, CSS, React, NextJS, Express.js, Node.js, NestJS, MongoDBBFT, Consensus(dPoS, PoW, PoC), Cryptography, MEV, P2P Cross Chain, zkSnark,Rollup, Agile, AWS, Github ActionsEXPERIENCEEvaCodes Senior DeFi Engineer (Solidity/Rust) Middletown, DE July 2021 June 2024Architected and developed 30+ decentralized applications (dApps) and smartcontracts including token bridges, staking, lending and auction platforms for MultiNFT marketplace using Solidity/Rust/Go/JS/TS and Web3.js/Ethers.js.Designed and implemented tokenomics models for Web3 gaming ecosystem usingvarious protocols as a DeFi researcher, ensuring a balanced ecosystem ofstakeholders, flows and incentives.Designed and developed the DEX infrastructure using concentrated liquidity inUniswap V3, working closely with a diverse team of game developers, designers andproduct managers.Developed rust smart contracts for Web3 gaming platform using Solanan CLI,Anchor and SPL-token package and deployed to Solana blockchain.Took part in developing account abstraction for gasless transactions using ERC-4337 standard and Biconomy SDK.Improved user experience with chain abstraction, using NEAR contract and chainsignature without any bridge contracts.Conducted thorough, in-depth security audited 50+ smart contracts for DeFi and Web3platforms to identify vulnerabilities, risks and gas optimization using Mythx andSlither.Actively engaged in peer code reviews and provided assistance to fellow engineersusing Git and GitHub.Helped the development team by answering technical questions and tookresponsibility for solving any engineering issues.Blur.io Web3/Smart Contract Developer San Francisco, CA October 2019 June 2021Spearheaded the development of an innovative NFT marketplace API using React,Next.js, Node.js, Express.js, and Web3/Ethers.js, incorporating features like userauthentication, secure digital wallet integration, interactive NFT listings, and anauction and bidding system, which significantly boosted the company's revenue by25% within the first year of operation.Utilized IPFS for decentralized storage of NFT metadata and assets, ensuringimmutability and persistence of digital content.Participated smart contracts development for secure and transparent management ofNFT ownership, transfers, and royalty distribution, using Solidity and ERC20,ERC721, ERC721A, ERC1155, ERC4626 from OpenZeppelin libraries.Implemented gas optimization techniques, storage slots functionality, and howdifferent operations within the smart contract affect the transaction costs.Experienced with upgradeable contracts, including knowledge of UUPSProxy, BeaconProxy, Diamond Proxy and Transparent Proxy patterns.Tested unit/integration/fuzz testing and deployed smart contracts with blockchaindevelopment tools - Hardhat and Foundry.Intellecy Full Stack Intern/Developer San Diego, CA April 2018 June 2019Built cross-browser compatible, responsive SPAs using React, Redux, TypeScript andNode.js to provide seamless user experiences.Implemented design patterns, and created reusable components, optimized frontendthrough code splitting technique by Webpack, caching strategies.Successfully transitioned the current codebase, including legacy jQuery plugins, intomodern ES6+ JavaScript components and libraries.Collaborated closely with design teams, translating Figma designs or PSD designs intopixel-perfect, responsive web interfaces.Implemented TDD practices, leading to a 50% decrease in defect rates, enhanced codequality, and strengthened team collaboration and knowledge exchange.Created REST API by using Node.js, Express.js, and Laravel to create a serverenvironment.Boosted system performance through the development of a well-structured databaseschema and query optimization.Participated in Agile methodology for application development and used JIRA as aproject management tool.EDUC AT IO NUniversity of Texas at San Antonio - San Antonio, TX April 2012 March 2018Master's Degree in Computer Science