Tutorials Software Architect Tutorial
Microservices Fit Check
Microservices Fit Check: free step-by-step lesson with examples, common mistakes, and interview tips — part of Software Architect Tutorial on Toolliyo Academy.
On this page
Software Architect Tutorial · Lesson 15 of 100
Microservices Fit Check
Foundations & Styles → Distributed & Data → Cloud & Quality → Leadership & Cases
Foundations & Styles · 1 — Decide · ~6 min · Styles and Patterns
What is this?
Microservices split deployable services with independent release and data — but add network failure, ops cost, and distributed complexity. Use them when team/scale pressure justifies it.
Why should you care?
Many products should stay modular monoliths longer. Architects get paid to say “not yet”.
See it live — copy this example
These are architecture exercises: fill templates, draw boxes, write ADRs. No cloud bill required.
# Fit score (1-5 each)
Independent deploy needed? _
Team count / ownership clear? _
Scale axes differ per area? _
Data can be split without chatty joins? _
Ops maturity (CI, observabilty, on-call)? _
# Prefer microservices if total is high AND ops is readyWhat happened?
- The scorecard stops fashion-driven splits.
- Low scores → modular monolith with clear modules.
Practice next
- Score your platform today honestly.
- Name one domain that truly needs independent scale.
- Name one that should stay together.
- Re-score after adding a second team.
- List the first three platform tools you would need.
Remember
Microservices are a trade-off. Ownership and data boundaries first. Ops readiness is a gate.
Premature split
Startup wants 15 services for 4 engineers.
Outcome: You recommend modular monolith + ADRs.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
Sign in to ask a question or upvote helpful answers.
No questions yet — be the first to ask!