There is a lot of material around about applying for IC roles at FAANG, including materials like this Google video. https://www.youtube.com/watch?v=BYUy1yvjHxE
There seems to be a big focus on preparing via Leetcode etc. I've got 20+ years in IC and EM roles and are currently an EM, and thinking about a (specific) EM role at a FAANG. Any thoughts on if I need to think about LC or just apply as any other company?