Minimum 4 years of hands-on experience. Develop and maintain high-quality code using C#, .NET Framework / .NET Core, REST APIs, Microservices, SQL Server, and Entity Framework Core for back-end systems. Proficiency with design patterns (Chain of Responsibility, CQRS, Factory, Builder, Singleton). Strong understanding of the .NET Core application lifecycle and .NET Core Web API. Experience with authentication and authorization mechanisms. Experience with serialization and deserialization (JSON, XML, binary, etc.). Practical knowledge of Entity Framework and ADO.NET. Asynchronous programming experience (async/await). Unit testing experience (tool agnostic). Experience applying SOLID principles in code design. Experience with Azure services: Storage (Table, Blob, Queue), Key Vault, Azure SQL, Application Insights, App Services, Application Gateway, CDN, Traffic Manager, and API Management. Experience designing RESTful APIs.