Hey Product Hunt! I'm Chris, and I built Le Systems because I was frustrated with how system design is usually taught. Most resources are either too surface-level ("just use a load balancer") or too academic. I wanted something in between — where you can actually see how a Kafka partition routes messages, or watch a Raft leader election play out, then immediately test your understanding. A few things I'm proud of: - The visualizations are vanilla JS, not a charting library. Every animation is hand-crafted to show exactly how these systems work under the hood. - The quiz system goes deep. Level 1 is fundamentals, level 8 is production edge cases — things like split-brain scenarios, tombstone compaction, and write amplification. - No paywall. I built this to help engineers actually learn, not to gate content behind a subscription. I'd love feedback on: - Which topics you'd want to see next - Whether the visualizations actually help things click - Any inaccuracies (I take correctness seriously) Thanks for checking it out!

Le Systems

Learn system design via interactive visualizations & quizzes

Learn system design via interactive visualizations & quizzes