Lead .NET Fullstack Devleoper United States/Reumite 6-12 Months Job Description: 5–9 years of experience in full stack application development using .NET and React Strong proficiency in C#, ASP.NET Core, Web APIs, Entity Framework, SQL Server, React.js, TypeScript, and JavaScript (ES6+) Experience with React ecosystem including Hooks, Context API, Redux/Zustand, React Router, and reusable component development Good understanding of frontend-backend integration and API consumption patterns Experience working on modernization of legacy enterprise applications Knowledge of microservices and API-driven architecture principles Experience building responsive UI applications using React and UI frameworks such as Material UI, Tailwind, or Bootstrap Exposure to frontend migration projects from legacy UI frameworks to React is a plus Experience using AI-assisted development tools such as GitHub Copilot, Claude Code, Cursor, or similar platforms Familiarity with Git, CI/CD pipelines, Agile/Scrum methodologies, and DevOps practices Understanding of authentication and security concepts such as JWT and OAuth Exposure to Azure/AWS cloud environments and Docker is an added advantage

Key Responsibilities

Develop and maintain scalable backend services using ASP.NET Core and Web APIs Build modern, responsive, and reusable frontend applications using React and TypeScript Participate in modernization of legacy monolithic applications into API-first and microservices-based architecture Collaborate with architects and technical leads on migration from .NET Framework to .NET Core and React modernization Use Agentic AI tools to improve productivity in coding, refactoring, testing, and code analysis Design and integrate RESTful APIs with frontend applications Write clean, maintainable, and testable code following engineering best practices Participate in code reviews, debugging, performance optimization, and troubleshooting activities Contribute to CI/CD implementation, automated testing, and deployment processes Work closely with cross-functional teams including QA, DevOps, Product, and UX/UI teams in Agile delivery environments