This definitely sounds like an interesting approach. I think however defining these modules and the interfaces between them is the hard part. Part of this work

This definitely sounds like an interesting approach. I think however defining these modules and the interfaces between them is the hard part. Part of this work is defining the bounded contexts and what should go where. If I understand DDD correctly this shouldn't be done by «tech» in isolation. It's something that's done by tech, business and design together. This is hard to do in the beginning – and I would argue that it should not be done in the beginning. When starting out you've just got a set of hypothesis about the market, how the market wants to be adressed and in which way you can have any turnover doing it. This isn't the point when one should be defining detailed bounded contexts, but should instead just be experimenting with different ways to get market fit. Edit: typo