Web3 Full-stack developer

Web3 Full-stack developer Building the future of AI-powered NFT commerce! Are you looking for your next development challenge? Step into the game by building a premium web-based NFT commerce platform that enables users to discover, purchase, and own AI-generated digital collectibles through a seamless fiat payment experience! About the Company We are recruiting on behalf of a growing software development company that delivers custom software solutions for enterprise businesses and startups across Europe and international markets. This role is project-based! Our client is building a premium web based NFT commerce platform that enables customers to discover, purchase and own AI-generated digital collectibles. Unlike a traditional NFT marketplace (such as OpenSea), our platform focuses on primary sales . Administrators create NFT collections, generate digital artwork, publish NFTs for sale, and customers purchase them using fiat payments. After successful payment, NFTs are transferred directly to the buyer's EVM compatible wallet. The project is designed with future expansion in mind, including secondary marketplace functionality, crypto payments, and multi-chain support. Responsibilities Participate in designing the overall system architecture Design and implement backend services and database schema Develop REST APIs Implement business logic Design and implement smart contracts Integrate blockchain infrastructure Integrate fiat payment provider (PSP) Implement background workers and queues Deploy and maintain development environments Participate in technical decision making Requirements Experience with web3 projects (especially NFT projects | ERC-721 standard) Strong TypeScript experience Solid Node.js or NextJS backend development Experience designing scalable REST APIs Experience with queue-based architectures PostgreSQL Docker Git Solidity Smart contract deployment Ethereum ecosystem Technical understanding of blockchain, wallets, transactions , smart contracts and token standards Technical skills that we are looking for: Backend Node.js | NestJS or similar TypeScript PostgreSQL Prisma ORM or similar Redis Rabbit MQ | BullMQ or similar IPFS / CDN for images storage/delivery Blockchain Solidity ERC-721 | ERC-1155 OpenZeppelin viem / ethers Hardhat or Foundry Infrastructure Docker GitHub Actions Linux Frontend React | Next.js or similar TailwindCSS | TypeScript or similar wagmi / RainbowKit / web3.js TanStack Query Nice to Have Fintech experience Payment provider integrations (Stripe, Adyen, Checkout.com , etc.) Experience with ERC-1155 standard Pinata or similar IPFS / CDN Experience with AI image generating pipelines Experience with frontend JS frameworks What You'll Build During the project you will participate in building: Main contribution in project architecture and system analysis NFT Collection Factory management ERC-721 | ERC-1155 smart contracts NFT images generation pipeline NFT minting and purchasing pipelines Integration with a sset s storage APIs for admin- and user-faced panels Order management | Payment processing Blockchain workers Production-ready backend architecture Benefits: Flexible working hours Competitive compensation package Possibility of extending collaboration for future projects Full time or Part time schedule For office work: Weekly lunch Snacks and beverages in the office Central location office Start powering the next generation of digital collectibles! Department IT Locations Bucharest, Limassol Remote status Fully Remote Employment type Full-time Bucharest Limassol About Olinio Olinio was founded with a vision to deliver impactful solutions to businesses to help them expand and flourish. We focus on solving problems, be it a human resources challenge or launching a new venture. Our team of specialists in their respective fields aim to provide a top-tier service, by leveraging their combined skills and industry know-how. Together with a network of highly professional partners, we are dedicated to optimizing your business, by understanding your market in depth, enabling scalability and growth.