# 07 - Step-by-Step Migration: From Monolith to Modular Monolith

Migrate your legacy monolith: Phase 1 - Identify boundaries, Phase 2 - Physical separation, Phase 3 - API extraction, Phase 4 - Event-driven migration. Realistic timeline: 2-6 months, low risk. Includes: case study with metrics.

## What you'll learn

- 1.1 Dependency Analysis
- 1.2 Event Storming with the Team
- 1.3 Prioritization
- Testing Strategy for Phase 2
- 1. Big Bang Rewrite

*This article is part of the **Architecture** series on federicocalo.dev.*

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## Read the full article

The complete article (16 min read) with code examples, diagrams, and practical exercises is available here:

**➡️ [07 - Step-by-Step Migration: From Monolith to Modular Monolith](https://federicocalo.dev/en/blog/migration-step-step-monolith-modular)**

`https://federicocalo.dev/en/blog/migration-step-step-monolith-modular`

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*By [Federico Calò](https://federicocalo.dev) — Software Developer & Technical Writer*