How to get a place in Microsoft/ Google in Data Analytics/ Data Science domain?

I have 4 YOE on data analytics/ data science ( out of these 2 in Amazon - current company). Current position - Business Analyst, but doing work in Data Science domain using SQL, Advanced Excel, Python, ML, NLP, AWS, Tableau etc. Now I want to switch in Dream Companies like Microsoft/ Google. Can you please suggest me which are the suitable roles for me (there are so much confusion in designation names). Furthermore I need suggestion on how to be prepared for the interviews for these companies?