I'd be fine calling myself a "AI Engineer" for having worked with TensorFlow, PyTorch and scikit-learn and having experience in running AI Models in production.
Nowadays, making requests to the API of a LLM provider is what makes an engineer a good fit for working at an AI company? Really?
Thats really working with someone elses AI, no?
FWIW I have used it quite a bit, but its not really the same thing as developing AI
(nevermind my usual rant that we shouldn't call any of this AI, but I digress)