Summary: We are seeking a Senior Fullstack Developer with strong .NET backend and React frontend skills to collaborate with cross-functional teams and interact directly with clients on challenging projects. Highlights: 1. Work on challenging, client-facing projects 2. Direct interaction with external clients 3. Take ownership of features and technical decisions Description **Location:** Argentina (Remote – Argentina only) Description We are looking for a Senior Fullstack Developer to join our team and work on challenging, client\-facing projects. This role requires a strong backend profile with solid experience in .NET, combined with frontend skills using React. You will collaborate closely with product, design, and other engineering teams while having direct interaction with external clients. Responsibilities Design, develop, and maintain scalable backend solutions using .NET. Build and maintain frontend features using React, ensuring high\-quality user experiences. Collaborate with cross\-functional teams to define, design, and deliver new features. Communicate directly with clients to understand requirements, provide updates, and propose technical solutions. Take ownership of features and technical decisions, ensuring best practices and code quality. Participate in code reviews and contribute to continuous improvement of the development process. Requirements 5\+ years of commercial experience as a software developer. Strong backend experience with .NET (this is the primary focus of the role). Solid experience working in Fullstack environments with React on the frontend. Excellent English communication skills, with proven experience working directly with clients. Experience working with external clients or in a consulting / agency\-style setup is highly valued. Proactive mindset, strong sense of ownership, and ability to work autonomously. 5 years