Job Summary: We are seeking a Senior .NET Developer to join our team, participating in the development and maintenance of applications using robust Microsoft technologies. Key Highlights: 1. Participation in system evolution and modernization projects. 2. Development of new functionalities and refactoring of legacy components. 3. Ensuring good development practices and code quality. We are Ecosistemas Global, a 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. With 30 years of experience and a multidisciplinary team of over 500 professionals, we are driven by our commitment to growing every project and client we work with. We want you to be part of this great team! What Are We Looking For? We are currently looking for a Senior .NET Developer to join our team, participating in the development and maintenance of applications. The position requires solid experience with Microsoft technologies and involvement in system evolution and modernization projects. Required Qualifications (Mandatory) Solid experience in .NET development Knowledge of C, VB6 Experience with .NET Web, WPF, and WinForms Proficiency with Visual Studio 2019 Experience with Microsoft Framework 4.5 Knowledge of Microsoft SQL Server 2014 Experience with TFS Understanding of design patterns and MVC architecture Responsibilities Development of new functionalities in existing applications. Corrective and evolutionary maintenance of applications. Refactoring of legacy components. Participation in migration processes toward more modern technologies. Technical analysis of functional requirements. Ensuring good development practices and code quality. Desirable Knowledge or experience with GeneXus. Work Conditions 90% remote work mode. (Mon–Fri, 9:00–18:00) Planned monthly attendance at the client’s offices (Microcentro, CABA). We offer excellent benefits, growth opportunities, and professional development support. At Ecosistemas Global, 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 essential to our success. We value and respect all voices, and we invite you to join our team, where inclusion is a fundamental pillar of our values. -Requirements- Minimum education: Tertiary years of experience Keywords: developer, programmer, dotnet, net, net, senior, sr