Design, develop, and maintain scalable backend systems using .NET Core 9 and C# , build modern frontend applications with Angular (latest versions), develop and integrate REST APIs and GraphQL services, implement Clean Architecture , CQRS , and DDD principles, integrate external systems and data sources (APIs, scraping tools, etc.), develop and manage data pipelines, ETL processes, and automation workflows, ensure secure authentication and authorization via OAuth2 , OpenID Connect , JWT , and RBAC . Implement background jobs, schedulers, and real-time features using SignalR and WebSocket . Monitor system performance, optimize scalability and reliability, participate in CI/CD pipelines, Docker deployments, and cloud environments (Azure and AWS ). Collaborate with cross-functional teams (Frontend, QA, Data, Business), contribute to technical documentation (SRS, archit...