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So, you broke apart your monolith. You introduced a message broker. You’re using event driven architecture. Events are flying everywhere. You’re decoupled now, right? But somehow nothing feels any better because your system is still really brittle. YouTube Check out my YouTube channel, where I post all kinds of content on Software Architecture & Design, including this video showing everything in this post. CRUD Events The problem might be the events you’re publishing: ShipmentStatusChangedShipmentAddressUpdatedEstimatedDeliveryDateChangedCarrierIdUpdated Every other service subscribes to these events and maintains its own local copy of shipment data. You might think you’re decoupling your system because you’re publishing events to… Read More »Event Driven Architecture and Coupling: You’re Not as Decoupled as You Think

You can follow every enterprise best practice. You can use Clean Architecture, some type of layered architecture, event-driven architecture, microservices, or whatever else is popular. It can still end up in the same place. You have a system that is really hard to change. YouTube Check out my YouTube channel, where I post all kinds of content on Software Architecture & Design, including this video showing everything in this post. When you do make a change, you are afraid you are going to break something. Eventually, the same comment keeps coming up: We would be better off rewriting this whole thing. The… Read More »5 Software Architecture Mistakes That Make Systems Hard to Change

You start off with what seems like the obvious solution to a multi-tenant SaaS application. We have tenant A. We have tenant B. We have one application and one database. Within that database, for every structure, whether that is a table, collection, or stream, we segregate things by a tenant ID. It is simple. It is easy. It works. Until it does not. What happens when one tenant imports five million records? Or they run a bunch of reports, and some of those reports are massive? That shared infrastructure which seemed simple is also what is coupling everything together. YouTube… Read More »Multi-Tenancy Isn’t About Databases