I assume the Corp Dev person will walk you through what the process will look like. Don't know much about the sales/bizdev world, guessing that's the area that'll make the most sense. CTO will likely be interviewing for an IC engineering role unless there is prior experience with leading larger teams. Lots of material out there on how to get into FAANG - start prepping as soon as you feel their interest is legitimate (assuming they do subject you to interviews).