System Thinking Foundations

System thinking is the ability to see the whole before the parts. In technical interviews, this means starting with constraints, scale, and trade-offs rather than jumping into implementation.

Why This Matters

Interviewers evaluate how you frame problems, not just how you solve them. Showing structured thinking early creates confidence and sets the tone for the rest of the discussion.

Core Idea

Before designing anything, ask:

1. What are we building? (scope)
2. Who uses it and how? (actors, use cases)
3. What are the constraints? (scale, latency, consistency, cost)
4. What can we defer? (MVP vs future)

Inline Check 1

What should you establish first in a system design interview?

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Inline Check 2

Name two types of constraints that affect architectural decisions.