System design interview practice: read the walkthrough, run the scenario, spot the bottleneck, calculate capacity, and explain the trade-off.
Ready-to-explore distributed system examples
Static diagrams are not enough. See the data move.
Describe the architecture as nodes and edges. The diagram lays itself out — you focus on the system, not the layout.
Every scenario animates the real packet flow over the topology. Reads, writes, failovers — see the actual path through cache, queue, and DB.
Architectures live alongside readme prose. Diagrams and decisions evolve together, not in different Confluence pages that drift.
Cache invalidation, CAP, sharding, queues, rate limiting — read the tradeoff, then press play and trace the failure mode in motion.
Short answers. Open one for the full version.
No. Start with free lessons and open architectures. Premium is for full system design cases, capacity math, failure modes, and learning progress.