freeCodeCamp

Learn system design with freeCodeCamp, step by step

11 videos in 2 steps, about 16 h 3 min of watching. Start at step 1 and move down.

1. 1Start here: the basicsNo background needed. What the main ideas are and why they exist.4 videos · 4 h 8 min0/4

   • 1.1 Guitar Theory Course for Beginners – Learn Fretboard, Major Scale and TriadsBeginner · 1 h 7 min · 82.4K views · 2025How a system grows from one server to many without falling over.
   • 1.2 Event Driven Architecture on AWS – Course for BeginnersBeginner · 1 h 33 min · 47.9K views · 2024Passing work and events between services without waiting for each other.
   • 1.3 What are Microservices?Beginner · 4 min · 297.6K views · 2018 (older)When to split an application into services, and what it costs.
   • 1.4 System Design for Beginners CourseBeginner · 1 h 25 min · 2M views · 2023Designing for Beginners Course: what it must do, the main parts, and the trade-offs.
2. 2Go deeperInternals, trade-offs and how large systems really behave.7 videos · 11 h 54 min0/7

   • 2.1 How to Put a Website Online: Template, Coding, Domain, Hosting, and DNSAdvanced · 59 min · 2.5M views · 2020 (older)How a name like example.com is turned into the address of a server.
   • 2.2 Scaling Your AI Models with Micro-DDP – TutorialAdvanced · 1 h 45 min · 20.9K views · 2026How a system grows from one server to many without falling over.
   • 2.3 System Design Course – APIs, Databases, Caching, CDNs, Load Balancing & Production InfraAdvanced · 2 h 5 min · 1.7M views · 2026How services expose and call each other's features.
   • 2.4 System Design Concepts Course and Interview PrepAdvanced · 54 min · 3.2M views · 2024Designing Concepts Course and: what it must do, the main parts, and the trade-offs.
   • 2.5 System Design for AI Agents – Building a Multi-Agent PR ReviewerAdvanced · 3 h 11 min · 83.6K views · 2026A walk through how a real product is put together: what it must do, the parts, and the trade-offs.
   • 2.6 DeepSeek R1 Theory Tutorial – Architecture, GRPO, KL DivergenceAdvanced · 1 h 8 min · 32.3K views · 2025A walk through how a real product is put together: what it must do, the parts, and the trade-offs.
   • 2.7 How to Speak the Language of Application ArchitectureAdvanced · 1 h 53 min · 20.9K views · 2018 (older)A walk through how a real product is put together: what it must do, the parts, and the trade-offs.

Order and levels are picked by us from titles and lengths. The one-line notes are ours. Every video plays from YouTube and belongs to freeCodeCamp.

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