[taeric]

I'm curious what has broken that was not directly related to the hard split between the wearable and the backend. This is a particular case where you are by definition doing a distributed system, so any attempts to hide that will be problematic.

My main thoughts are anywhere you are trying to hide that distributed nature, things will go awry. Add to that, anywhere you have introduced the potential for things to be distributed.

The sibling post about keeping it simple as you build up your eventing system is pretty accurate. Remember you are trying to solve an actual customer problem. Keep pointed on that and do not get distracted by any neat engineering problems that come along the way. (This is not to say you will not have to solve some... but if you are solving a neat problem that was not needed for the customer's problem, you are going to have trouble.)