Senior Full Stack Developer
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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 flexible 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.
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 Hotwire Native, ElasticSearch, Redis, or Google Cloud Platform.
We celebrate diversity and want our team to reflect this inclusively. At Netenders , we are committed to equal employment opportunities regardless of ethnicity, religion, gender, national origin, sexual orientation, age, marital status, disability, gender, gender identity, or gender expression
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