Probably depends on the company. I think it's not in those big tech companies where everything is quite standardized. In my case, besides my manager, most of the guys discussing my promotion wouldn't even know me personally. Evaluation is very factual. It's more about picking the right projects so you can check all the boxes, also not pissing off colleagues.
Same goes for interviewing. I passed several FAANG interviews when I was 45. I just practiced Leetcode like anybody else. Leetcode has its flows, but solving leetcode problems isn't out of reach for an older candidate. Could be harder to find the time to practice, but solving problems in interview situation is a matter of practice. The problems are pretty much known in advance.
Edit: Now that I'm an interviewer, I really just ask my questions, and check boxes based on the candidate performance. We're also trained to avoid biases and so on...
That being said, I very rarely see "older" candidates despite the constant reminder we're an inclusive place.
Same goes for interviewing. I passed several FAANG interviews when I was 45. I just practiced Leetcode like anybody else. Leetcode has its flows, but solving leetcode problems isn't out of reach for an older candidate. Could be harder to find the time to practice, but solving problems in interview situation is a matter of practice. The problems are pretty much known in advance.
Edit: Now that I'm an interviewer, I really just ask my questions, and check boxes based on the candidate performance. We're also trained to avoid biases and so on...
That being said, I very rarely see "older" candidates despite the constant reminder we're an inclusive place.