Juanjo Fernández

JuanjoFR is the professional brand of Juanjo Fernández, a Barcelona-based freelance full-stack web developer and entrepreneur. With more than 10 years of software development experience and a freelance practice dating from 2018, he builds production-ready digital products designed to solve real-world problems and deliver practical value. His services span end-to-end web application development, from modern frontend experiences to robust backend systems and APIs.

He works with React and Next. js, Node. js, PostgreSQL through Supabase, and MongoDB, with an emphasis on modular, maintainable, and scalable architecture.

JuanjoFR also develops cross-platform mobile applications using React Native and integrates artificial intelligence into products, including agent-based workflows and generative user interfaces. Public projects illustrate this range, including an AI-powered color palette generator, a Google Places search and management application, and a custom authentication demo. Juanjo Fernández collaborates with startups and digital businesses, and is open to high-impact engineering roles, AI product partnerships, and technically challenging projects.

His approach combines sound engineering principles with an entrepreneurial focus on building useful, sustainable technology