Feb 9
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In this lecture, we continue our system design journey and focus deeply on High-Level Design (HLD) for a real-world microservices-based e-commerce system. You’ll learn how system design gives clarity before writing code—helping you decide architecture, services, infrastructure, communication patterns, and scalability strategies upfront. We start by revisiting why system design matters, especially for backend engineers, and then move into HLD fundamentals. You’ll see how to break a large system into independent microservices like User, Product, Order, Payment, and Notification services. We’ll also discuss frontend considerations (SSR vs CSR), backend APIs (REST vs GraphQL), and how to choose the right databases for transactional vs non-transactional workloads (PostgreSQL, MongoDB, DynamoDB). This lecture also explains service communication patterns—when to use synchronous gRPC and when to rely on asynchronous messaging with Kafka. We introduce key infrastructure components like API Gateway, Kubernetes on AWS, load balancing, horizontal scaling, and security with TLS and JWT. You’ll also see where tools like Elasticsearch fit into the architecture for fast product search. This HLD forms the blueprint for everything we’ll build next in this Go microservices course. Subscribe to follow along as we move into Low-Level Design and implementation. 📚 CHAPTERS 00:00 Recap: Why system design matters 02:30 What High-Level Design (HLD) means 05:10 Choosing architecture (microservices vs others) 07:40 Frontend considerations (SSR vs CSR) 10:20 Backend components and APIs 13:10 Database choices (SQL vs NoSQL) 16:10 Breaking down microservices (User, Product, Order, Payment) 18:40 API Gateway and client communication 21:10 Synchronous (gRPC) vs asynchronous (Kafka) communication 24:30 Scalability, deployment, and security overview 26:40 What’s next: Low-Level Design (LLD) #systemdesign #microservices #highleveldesign #backendengineering #softwarearchitecture #distributedSystems #scalability #grpc #kafka #kubernetes #cloudarchitecture