System design guide
System design for non-engineers
System design is how engineers plan complex software architectures. You do not need to design systems — but understanding the concepts helps you work with engineers, scope features, and make better product decisions.
Why non-engineers need system design vocabulary
When an engineer says “this feature would require significant backend work because of how we handle state”, do you know what they mean? System design vocabulary lets you have real conversations with engineers, understand trade-offs, and make better decisions about what to build.
Frontend vs Backend vs Database
The three-tier model is how most web applications are structured. Most web features touch all three layers — which is why engineering estimates often seem larger than expected.
Scalability basics
What happens when 10x more users try to use your product at once? That is a scalability question.
Reliability and availability
Reliability is about building systems that keep working even when individual components fail. These terms appear in engineering reviews, incident post-mortems, and vendor contracts.
Microservices vs Monolith
Most startups start monolithic. Most large tech companies have moved to microservices. If engineering says “we need to break this out into a separate service”, this is the context.
Terms you will hear in engineering discussions
Four terms that come up in sprint planning, architecture reviews, and incident post-mortems.
Next step
Learn how to work with engineers
System design vocabulary is the foundation. The tech communication guide covers how to apply it in real engineering conversations.
Tech communication guide