Job Summary: We are looking for a Senior Full Stack Developer to drive the evolution and modernization of a diverse technological ecosystem, participating in backend development, incident resolution, and system refactoring. Key Highlights: 1. Participation in the evolution and modernization of a technological ecosystem 2. Technical environment that values quality and continuous improvement 3. Real opportunity for technical growth **Job Description** ======================== **What will you do?** Backend development primarily in **Node.js or Delphi** (depending on experience). Resolution of critical production incidents (Level N3). Evolution and refactoring of existing systems. Participation in progressive migrations toward more maintainable architectures. Development of new features. Performance and SQL query optimization. Participation in code reviews and continuous improvement.**About the Company** =============================== At Septeo, we are seeking a **Senior Full Stack Developer** with a solid technical foundation in Node.js or Delphi who wishes to participate in the evolution and modernization of a diverse technological ecosystem. Our environment combines legacy applications and current web solutions. We seek a candidate with strong technical judgment, capable of adapting to various programming languages and actively contributing to the structural improvement of the system.**Qualifications** ================== Solid experience in **Node.js or Delphi** Proficiency in Object-Oriented Programming Experience with relational databases (MySQL or others) Ability to work with complex and heterogeneous systems Structured mindset oriented toward best practices **Highly Valued** Experience in legacy environments Experience in system refactoring or modernization Experience working with multiple programming languages throughout your career Interest in learning technologies such as WinDev**Additional Information** ================================ **What we offer** Permanent contract and job stability 100% remote work from Spain Stable product-based project (not consulting) Technical environment that values quality and continuous improvement Real opportunity for technical growth Competitive salary commensurate with your experience Collaborative, dynamic, and technology-driven work environment Central office with modern facilities and excellent location