“I get asked this question a lot. My first piece of advice would be that the less well you understand a domain, the harder it will be for you to find proper bounded contexts for your services. As we discussed previously, getting service boundaries wrong can result in having to make lots of changes in service-to-service collaboration — an expensive operation. So if you’re coming to a monolithic system for which you don’t understand the domain, spend some time learning what the system does first, and then look to identify clean module boundaries prior to splitting out services.”