This article was originally published on tech.7mind.de
When I joined 7Mind a year ago, I was hired partially to help migrate the existing system away from micro-services towards a new monolithic Elixir application.
This decision was made before I had joined, but having worked in a company that went very all-in on micro-services before, I welcomed it. But first, some background.
As with many older startups, their initial system was not designed to handle whatever the day-to-day is now, many years later.
This sounds like vertical slicing (incl bounded contexts), which is my preferred architecture for a monolith. It gives you the flexibility to pivot architecture more easily.
I suggest you look into Evolutionary Architecture, with can help keep vertical slicing
We’ve gone all-in with SSR+FaaS (aka JAMStack) with multiple projects. You get similar benefits to microservices, but without the complexity. However, hosting can be more expensive under high loads.