I'd go a step further. Sometimes as a dev, there's no need to even understand the whole app. A Front-end dev doesn't need to know how the API level works and

I'd go a step further. Sometimes as a dev, there's no need to even understand the whole app. A Front-end dev doesn't need to know how the API level works and the API dev's don't need to know how the Dev-opts work. I mean it's not a NEED.. All the FE dev need to know is that the API returns the data. Extended.. all a dev of one microservice need to know is that micro-service-x returns..