--- title: "System Design Explained: APIs, Databases, Caching, CDNs, Load Balancing & Production Infra" url: https://daily.dev/posts/system-design-explained-apis-databases-caching-cdns-load-balancing-production-infra-jfj7yd9xk source_url: https://levelup.gitconnected.com/system-design-explained-apis-databases-caching-cdns-load-balancing-production-infra-d986f8d79a4f type: article source: "gitconnected" published: 2026-08-15T17:58:39.722Z updated: 2026-08-15T20:22:33.352Z tags: ["career", "backend"] reading_time: 5 upvotes: 190 comments: 4 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # System Design Explained: APIs, Databases, Caching, CDNs, Load Balancing & Production Infra **[gitconnected](https://daily.dev/sources/gc)** · 5 min read · 190 upvotes · 4 comments ## Summary A beginner-friendly walkthrough of core system design concepts, starting from a single-server setup and progressing through database selection (SQL vs NoSQL), vertical vs horizontal scaling, load balancing algorithms (Round Robin, Least Connections, IP Hash), and strategies for avoiding single points of failure through redundancy. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#career](https://daily.dev/tags/career), [#backend](https://daily.dev/tags/backend) [View this post on daily.dev](https://daily.dev/posts/system-design-explained-apis-databases-caching-cdns-load-balancing-production-infra-jfj7yd9xk)