What does it take for a platform to support dependable growth without technical debt slowing it down? The Senior .NET FullStack Developer (.NET/JS) role in Spain is remote and sits at the point where trusted data and scalable web applications meet. Teams in this space move fast to deliver new features, and the person in this role decides how quality and reliability are built into every release. You shape how the platform adapts to new demands while keeping the codebase robust. The role holder makes it possible for the platform to keep pace with business needs.