Requirements & capacity
Clarify the product, estimate demand, and define your constraints.
Explore practiceHIGH-LEVEL SYSTEM DESIGN
Think in systems.
Design for change.
Turn ambiguous requirements into an architecture you can defend. Explore scale, reliability, and the trade-offs that shape real services.
Your learning. Your pace. A clearer next step.
YOUR PRACTICE PATH
- 01Clarify the goalStart with functional requirements, scale, and the most important constraints.
- 02Trace the requestSketch the architecture and follow how data moves through it.
- 03Pressure-test the designLook for bottlenecks and failure modes. Explain your decisions in an interview session.
BUILD YOUR FOUNDATIONS
Know the ideas.
Put them to work.
Explore the concepts behind high-level system design, then apply them in the practice library.
APIs & data models
Map user actions to interfaces and the data they need.
Explore practiceStorage & indexing
Compare access patterns, consistency, and storage choices.
Explore practiceCaching & distribution
Think through traffic, replication, queues, and bottlenecks.
Explore practiceReliability
Design for failures, recovery, observability, and availability.
Explore practiceArchitecture trade-offs
Explain why each component belongs and what it costs.
Explore practiceA MORE THOUGHTFUL SESSION
Make every attempt
teach you something.
Practice is most useful when you can explain what changed in your understanding. Build that habit into every session.
Choose your next challenge01 / Clarify the goal
Start with functional requirements, scale, and the most important constraints.
02 / Trace the request
Sketch the architecture and follow how data moves through it.
03 / Pressure-test the design
Look for bottlenecks and failure modes. Explain your decisions in an interview session.
KEEP EXPLORING