Netenders is an international e-commerce group based in Barcelona, operating several leading online stores in Europe and North America. As we continue to grow and innovate, we are developing our own cutting-edge e-commerce Content Management System (CMS) to revolutionize the online shopping experience across our brands. We are looking for a Senior Full Stack Developer (Freelance) to collaborate with our in-house tech team on high-impact, long-term projects. This is a freelance position, with adaptable remote work (Barcelona-based candidates are a plus). Your Role: * Leading the technical evolution and optimization of our multi-brand e-commerce ecosystem. * Architecting scalable React frontends and robust Ruby on Rails backend services. * Developing core CMS features, specifically focusing on complex supplier integrations and high-volume data flows. * Designing high-performance APIs and back-office tools for pricing and SEO management. * Ensuring code quality and architectural consistency through expert-level pull request reviews.



* Collaborating with cross-functional teams to translate business requirements into clean, maintainable code. About you: You are a self-driven developer with a consultant mindset. You don’t just write code; you design solutions that consider the long-term health of the product. You enjoy the autonomy of freelance work but understand the importance of mentorship and sharing your technical expertise to help internal teams grow. Requirements: * 5+ years of experience with Ruby on Rails (v5+), including successful version migrations. * 3+ years of professional experience building modern interfaces with React. * Deep understanding of software design patterns and RESTful API architecture. * Proven track record in e-commerce or handling complex, data-heavy backend systems. * Strong proficiency with Docker and GIT-based workflows. * Ability to work autonomously and communicate complex technical concepts clearly. * Nice-to-have: Experience with Hotwi

📌 Senior Full Stack Developer (Tarragona)
🏢 Netenders
📍 Tarragona