Backend Developer – E-commerce (Remote, Vietnam and China Priority) at Hyphen Connect Limited. . Location: China. Job Summary. . We are hiring for an innovative crypto wallet and payment network startup who are looking for a Full-Stack Developer to build and maintain the e-commerce marketplace service within their crypto wallet app, built with React Native. You will develop and customize a whitelabel or prebuilt platform and integrate it with the crypto payment system.. . Responsibilities. . . Develop and customize a whitelabel or prebuilt e-commerce platform to create a marketplace service within the app.. . Implement crypto payment flows using QR/NFC, ensuring seamless user experiences in the marketplace.. . Build and maintain APIs to connect the e-commerce system with the smart contract-based backend.. . Collaborate with the Senior Engineer and Tech Lead to ensure scalability and security of marketplace features.. . Contribute to admin and customer portals for marketplace management and user interaction.. . Document code and integration processes for internal and external stakeholders.. . . Qualifications. . . Backend Engineer who has worked in a mobile-first environment.. . 4+ years of experience in full-stack development (e.g., Node.js, React, JavaScript/TypeScript).. . Experience with e-commerce platform development or integration, ideally marketplace-focused.. . Familiarity with blockchain technology and crypto payments (e.g., Web3.js, Ethers.js).. . Proficiency in API development and integration with payment systems.. . Ability to work remotely and align with Hong Kong/Singapore time zones.. . Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).. . . Preferred Skills. . . Experience with marketplace platforms like Shopify, Magento, or WooCommerce.. . Knowledge of crypto payment gateways and QR/NFC payment systems.. . Familiarity with React Native for mobile app development..
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