Enterprise-Grade .NET Background Job Processing System

Design and implement a scalable, fault-tolerant background job processing system in .NET to handle long-running enterprise workloads such as data processing, email notifications, report generation, and third-party integrations.

Requirements:

• Use .NET Hosted Services (IHostedService / BackgroundService) or Hangfire
• Support job scheduling, retries, and failure handling
• Ensure graceful shutdown and job persistence
• Implement logging, monitoring, and error tracking
• Follow clean architecture and SOLID principles

Expected Deliverables:

• Well-structured .NET solution with clear separation of concerns
• Sample long-running job implementation
• Configuration for retries, concurrency, and scalability
• Explanation of design decisions and trade-offs
• Optional: Dashboard setup (Hangfire) for job monitoring

Target Audience:
Senior .NET Developers, Backend Engineers, Solution Architects, and Enterprise Application Teams.

• Real-World Use Cases:
• Asynchronous data processing
• Background email & notification systems
• Scheduled enterprise reports
• Integration with external APIs
• High-volume task execution without blocking user requests

This prompt simulates real-world enterprise scenarios commonly asked in system design interviews and used in production-grade .NET applications, making it ideal for skill assessment, learning, and architecture evaluation.