November 25, 2025 | Read Online | How Would You Explain This System Design? A simple breakdown of how a web app works |
|  | | Sophie @ the stack |
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| | | | | | 🔍 HOW WOULD YOU EXPLAIN THIS SYSTEM? hel | A common mistake is thinking system design interviews are all about technical details. They’re not. | Actually, clear communication and simple explanations matter more than perfect technical knowledge. | Let’s look at how to explain this web app clearly and simply: |  | Source: ByteByteGo |
| It all starts with CI/CD pipelines that deploy code to the server instances. User requests originate from the web browser. After DNS resolution, the requests reach the app servers. Load balancers and reverse proxies distribute user requests evenly across the web application servers. The requests can also be served by a Content Delivery Network (CDN). The web app communicates with backend services via APIs. The backend services interact with database servers or distributed caches to provide the data. Resource-intensive and long-running tasks are sent to job workers using a job queue. The full-text search service supports the search functionality. Monitoring tools store logs and help analyze data to ensure everything works fine. In case of issues, alerting services notify developers through platforms like Slack for quick resolution.
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