If one wants to start from zero experience of Neural Networks, but expertise in application development process, what resources would you recommend to start learning?
Ng's deeplearning.ai is good for getting a solid background in how it all works. If you want to just jump into building things, I'd highly recommend http://course.fast.ai.
The fast.ai courses are designed for engineering people coming to ML. They are excellent.
I you're looking to learn about the maths behind neural nets and really understand how they work I'd recommend Andrew Ng's deeplearning.ai course. Starts from scratch and will give you a deep understanding when you're done.