Senior .NET Interview | 13+ Years Experience | Microservices & System Design

Watch a real Senior .NET Interview covering complex system design and microservices architecture for experienced developers. This session features a candidate with over 13 years of experience discussing architectural decisions for a retail application. We break down the practical implementation of a Senior .NET Interview, focusing on how to handle real-world challenges like service decomposition, the Saga pattern, and ensuring data consistency across distributed systems. You will see how to apply Microservices architecture to manage production failures using strategies like idempotency, retries, and the Outbox pattern. We also explore the nuances of ASP.NET Core and Azure development, covering DbContext lifetimes, caching, and concurrency. This session is designed to help you explain your reasoning behind system design choices rather than just reciting definitions. Subscribe for more real-world technical breakdowns, and share one challenging system design question you have faced in an interview below. Subscribe for more real-world technical breakdowns, and share one challenging system design question you have faced in an interview below. Follow how Order, Payment, Inventory, and Notification services interact in a retail application. Understand the Saga Pattern, orchestration vs choreography, and compensating transactions. Examine synchronous vs asynchronous communication, Azure Service Bus, and notification architecture. Learn how idempotency, retries, Circuit Breaker, and the Outbox Pattern address production failures. Explore caching, cache stampede, connection pooling, Docker, and horizontal vs vertical scaling. Review EF Core DbContext lifetime, dependency injection, and Scoped, Singleton, and Transient services. Connect optimistic and pessimistic concurrency with API design, concurrent updates, and database consistency. This interview goes beyond definitions. What happens when the same payment request arrives twice? When a database commit succeeds but event publishing fails? When thousands of requests hit an expired cache—or two users update the same record? Animated architecture diagrams help you follow the discussion, evaluate the candidate’s answers, and understand the missing pieces needed for a complete senior-level response. Topics covered: • Project architecture and microservice decomposition • API Gateway and service communication • Saga, orchestration, choreography, and compensation • Azure Service Bus and notification architecture • Idempotency and duplicate payment protection • Docker, deployment, stateless services, and scaling • Retry policies, Circuit Breaker, and the Outbox Pattern • Cache stampede prevention and connection pooling • EF Core DbContext lifetime and mixed units of work • Optimistic vs pessimistic concurrency • API contracts, conflict handling, and database consistency Preparing for an experienced .NET developer interview? Try answering each scenario before listening to the candidate’s response, then compare your reasoning with the visual explanations. Which answer would you handle differently—and why? Share one real senior .NET interview question you’ve faced. It could become a future DotNet Decode breakdown. Subscribe to DotNet Decode for practical C#, ASP.NET Core, Azure, EF Core, microservices, and system design explanations. 📚 Continue your interview preparation: ▶ Interview Experiences — watch more real interview discussions:    • .NET Interview Questions & Real Experience...   ▶ C# Coding Playlist — practice coding problems and solution walkthroughs:    • C# DSA for Product-Based Interviews   Get vidIQ to grow your channel faster! 🚀 https://vidiq.com/DotNetDecode 0:00 Professional Background and Experience 1:07 Transitioning to Microservices Architecture 2:30 Decomposing Complex Microservices 3:54 End-to-End Request Flow and Gateway Logic 8:32 Mastering Idempotency in API Design 13:40 Scaling Strategies for High Traffic Spikes #DotNetInterview #Microservices #AspNetCore