Lets see, front end presentation, front end service, frontend api, backend to front end (BFF) api/routing, BFF logic, BFF api, backend routing, backend logic, backend database, worker routing, worker logic, worker storage.

And then the each of the service layers can be broken into layers themselves depending on the complexity of the business logic can be broken into layers as well. So yea a change in a worker can potentially bubble up through all the layers.