12 Essential Best Practices for a Successful Microservices Migration

Breaking the monolith and moving to a microservice architecture may not be as hard as it seems, but many underestimate the overall complexity.

Traditionally, applications are built as a single unit, packaged, and deployed to a server. As business and product complexity grow, maintaining this monolithic architecture slows development, prompting enterprises to seek more sustainable, flexible, and integrable solutions.

Even when the decision to adopt microservices is made, many companies underestimate the overall complexity and make disastrous mistakes.

Microservices represent small, autonomous, self‑running services that each implement a single business capability. Below is a classic diagram showing how an API gateway accesses multiple microservices.

Rushing from a monolith to a "new era" of microservices can cause leap‑frog errors, leading to skyrocketing costs and fatal lifecycle issues.

Here are twelve best‑practice guidelines for microservices:

Independent Data Storage

Before migrating, clarify that each microservice must have its own private data store, using patterns like CQRS to ensure data isolation. Sharing a single database across services creates coupling; services should only exchange data via APIs.

Dedicated Teams

Microservices shine as cloud‑native applications that require rapid, continuous deployment. To achieve this, organizations need specialized teams that can efficiently scale, manage the nuances of each service, and uphold best practices.

Automated Independent Deployment

Decomposing a monolith into individual services is only valuable if the build and release processes are automated, reducing delivery time and improving deployment speed.

Leverage REST API Advantages

Using and creating REST APIs gives microservices flexibility without requiring additional software or libraries, supporting various call types, data formats, and hypermedia capabilities.

Cultural Shift Understanding

Moving to microservices involves not just technical changes but also cultural ones; developers must align with new expectations and the company’s vision to work effectively in the new environment.

Break Migration into Multiple Steps

Since the overall architecture often includes a single repository handling deployment, monitoring, and other complex tasks, attempting a full migration at once is unrealistic. Instead, retain the monolith temporarily while developing independent microservices, then gradually replace components.