In order to break a web application that is currently implementing a monolith approach, we need to find a way to break up our application into independent microservices. To ensure that we can split the application up while maintaining functionality, the first thing we can to do is break down our application into main "modules", "components" or services within our monolith in order to separate non-related code that may be depending on each other (ie checkout is touching login, somehow). Once we have split up our application and created independent sub-applications/modules, we can start moving those modules onto microservice SAAS such as AWS . The next thing we need to do is have system/use a message queue to orcistrait the communication for our microservices talking to each other. We can use platforms like RabbitMQ, Kafka, Amazon SQS, Celery, and ActiveMQ .