Arduino with NodeMCU customized PCB Board

I am looking forward for someone who can help me in designing the a customized PCB board which has an Arduino and NodeMCU keeping in mind this is an medical device which will be needed to go for all kind of certification for selling the product in India , Europe and American Market.
Please Note the person should have experience of working for the certification and also can guide me through for getting the certification done.
I will share the block diagram and other requirements in our future talks