Tutorials System Design Tutorial
Enterprise Architecture Basics — Complete Guide
Enterprise Architecture Basics — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of System Design Tutorial on Toolliyo Academy.
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System Design Tutorial · Lesson 10 of 100
Enterprise Architecture Basics
Basics → Scale → Interview
Basics · 1 — Building blocks · ~6 min · Module 1: System Design Foundations
What is this?
Enterprise architecture aligns business domains, platforms, and governance — standards for identity, data, and integration across many teams.
Why should you care?
ShopNest grows into payments, logistics, ads. Without shared rules, every team invents a different auth and logging story.
See it live — copy this example
Sketch the architecture on paper. These lessons focus on concepts and trade-offs.
ShopNest enterprise map:
Domains: Catalog | Checkout | Fulfillment | Identity
Shared: API gateway, SSO, audit log, event bus
Rule: no direct DB reads across domainsRun Example »
This lesson uses terminal or setup steps. Run commands on your computer — the live editor appears on coding lessons.
What happened?
- Domains own their data.
- Shared platform services provide cross-cutting needs.
- Boundaries beat a single mega-database everyone joins.
Practice next
- Name four ShopNest domains.
- List two shared platform services.
- Forbid cross-domain SQL in your rules.
- Add a Fraud domain touching checkout events only.
- Document the approved event bus.
Remember
Domains + shared platform. Data ownership matters. Governance makes scale sustainable.
Domain ownership chart
ShopNest publishes which team owns Orders vs Catalog.
Outcome: Incidents route to the right on-call faster.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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