I wouldn’t have ML engineers doing ML. They should be working on scaffolding, maintenance, production side, etc. The worst ML scientists (producing ML models) I’ve experienced were software developers who transitioned.
One of the main differences between ML in academia and industry is related to sourcing the training data. In academia they just use available pre-tagged datasets such as ImageNet, in industry you have to collect, clean up, organise, train, iterate with new data.
Production development of a model is a very hard problem and it's interesting because I see few companies trying to tackle it. One of them is tecton.ai (heard about them on SED) and I'll be interested to see how they evolve their feature set because it still seems incomplete.