Full-Stack Web3 Dev for Gaming Marketplace

Project Overview We are building MarketHub, a blockchain-powered Web3 marketplace where users can discover, buy, sell, trade, and manage digital gaming assets using cryptocurrency and Web3 wallets. The platform combines Web3 marketplace functionality, blockchain transactions, digital asset licensing, AI integration, and user account management. We are looking for an experienced Full-Stack Web3 Developer to review, improve, and continue developing the existing MarketHub platform. Key Responsibilities - Review and understand the existing MarketHub codebase and architecture. - Develop and improve the Web3 marketplace frontend and backend. - Implement and maintain Web3 wallet connectivity. - Integrate blockchain transactions into marketplace workflows. - Develop and improve smart-contract functionality using Solidity and OpenZeppelin. - Implement buying, selling, listing, trading, and digital-asset licensing workflows. - Support secondary marketplace functionality. - Integrate cryptocurrency/token-based payments. - Improve transaction status handling and blockchain confirmation flows. - Work with MongoDB for marketplace and user-related data. - Integrate AI-powered functionality into the marketplace. - Improve frontend performance, responsiveness, and user experience. - Identify technical issues, security risks, and areas for architectural improvement. - Test marketplace workflows across frontend, backend, and blockchain components. - Collaborate on future features and technical improvements. Ideal Candidate We are looking for someone with proven experience in: - Full-stack Web3 development - React / Next.js / TypeScript - Node.js backend development - Solidity smart contracts - Ethereum / EVM-compatible networks - OpenZeppelin - Web3 wallet integration - Token-based transactions - NFT or digital-asset marketplaces - MongoDB - REST APIs and backend architecture - Blockchain transaction management Experience with gaming, GameFi, NFT marketplaces, DeFi, or AI + Web3 platforms is a strong advantage. What We Expect The selected developer should be comfortable working with an existing codebase rather than starting everything from scratch. The initial phase will focus on: - Reviewing the existing MarketHub platform. - Understanding the current architecture and workflows. - Identifying technical gaps and potential issues. - Reviewing Web3 and blockchain integration. - Evaluating marketplace functionality. - Recommending improvements. - Implementing agreed-upon improvements and features. Deliverables - Improved and maintainable MarketHub codebase - Functional Web3 wallet integration - Reliable blockchain transaction workflows - Marketplace buy/sell/listing functionality - Digital asset licensing functionality - Secondary marketplace functionality - AI integration improvements - Improved frontend UX and performance - Proper error and loading-state handling - Secure and well-structured smart-contract integration - Technical documentation where appropriate How to Apply Please include: - A brief introduction - Your experience with Web3 marketplace development - Relevant React/Next.js + Node.js projects - Solidity / smart-contract experience - Examples of Web3, NFT, GameFi, or blockchain projects - GitHub or portfolio links - Your availability - Your hourly rate or project-based expectations Please also briefly describe one Web3 project you have developed or significantly contributed to, including your specific responsibilities.