Senior Full Stack Developer (Node.js / Delphi)

Description

Job Summary: We are seeking a Senior Full Stack Developer with a solid technical foundation in Node.js or Delphi to participate in the evolution and modernization of a diverse technological ecosystem, contributing to the system's structural improvement. Key Highlights: 1. Primary backend development in Node.js or Delphi 2. Resolution of critical production incidents 3. Evolution and refactoring of existing systems **Company Description** At Septeo, we are looking for 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 system's structural improvement. **Job Description** **What will you do?** * Primarily backend development in **Node.js or Delphi** (based 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 optimization and SQL query tuning. * Participation in code reviews and continuous improvement. **Requirements** * 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 Desirable** * 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 employment contract and job stability * 100% remote work from Spain * Stable product-based project (not consulting) * Technical environment that values quality and continuous improvement * Genuine 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