Job Summary: We are seeking a Senior Full Stack Developer to join our global team, focused on application development and maintenance, production support, and technical innovation. Key Highlights: 1. Global technology company with presence in more than 15 countries 2. Opportunities for growth and professional development 3. Inclusive environment that values diversity We are Ecosistemas, a global technology company that connects our clients with tailored, comprehensive, and innovative solutions. We operate in more than 15 countries, including Argentina, Chile, Brazil, Mexico, the United States, and Spain. We want you to be part of this great team! What are we looking for? Senior Full Stack Developer to join our client’s team. Work location: CABA Work mode: Hybrid Working hours: 9 AM – 6 PM Academic Requirements: University degree in Systems Engineering, Computer Science, or related fields (Preferred) Advanced English (Required) Technical Skills: More than 4 years of experience in full-stack development with production applications Experience with Azure services (App Service, SQL Database, Key Vault, Blob Storage, Azure Kubernetes Service) Strong proficiency in JavaScript/TypeScript, React.js, and Node.js Experience with Java and Spring for backend development Solid understanding of SQL and experience with relational databases (SQL Server, PostgreSQL) Experience designing RESTful APIs and microservices architecture Familiarity with cloud platforms, preferably Microsoft Azure Knowledge of containerization technologies (Docker, basic Kubernetes concepts) Experience with Git version control and CI/CD practices Soft Skills: Strong problem-solving skills with attention to detail. Excellent communication skills to interact with business stakeholders. Ability to work independently and manage multiple priorities. Collaborative mindset with experience in agile methodologies Responsibilities: .Application Development and Maintenance (60%) Develop, maintain, and enhance features for web applications using React.js, Node.js, and JavaScript. Design and implement RESTful APIs and microservices following best practices and security standards. Optimize application performance, including database queries, caching strategies, and UI rendering. Implement responsive and accessible user interfaces supporting multiple languages (Spanish, Portuguese, English) Integrate applications with enterprise systems and third-party services .Production Support and Incident Management (25%) Provide Level 2/3 support for production applications Troubleshoot and resolve complex technical issues across the full application stack. Conduct root cause analysis and implement permanent solutions to prevent recurring incidents. Monitor application health using APM tools and proactively address performance degradation Collaborate with business users to understand and resolve functional issues. Technical Modernization and Innovation (15%) Implement security best practices, including OWASP standards, secure coding, and vulnerability remediation. Modernize batch processing workflows to event-driven architectures Contribute to technical debt reduction and architectural improvements. Document technical designs, APIs, and operational procedures. · Excellent benefits, growth opportunities, training programs, and professional development support are offered At Ecosistemas, we believe diversity enriches our culture and perspectives; therefore, we actively foster an inclusive environment where every individual—regardless of origin, gender, orientation, abilities, or beliefs—is not only welcome but also essential to our success. We value and respect all voices, and we invite you to join our team, where inclusion is a cornerstone of our values.-Requirements- Minimum education: University graduate years of experience Keywords: developer, programmer, senior, sr