I'm an elderly senior software engineer (programmer). If elderly is redundant to senior, then please know it's possible to be senior without being elderly. Alas, I'm characterized by both words.

I've "worked" in software development since 1961. Then, computers were rare, huge, and weak. I loved the work. I've continued past my 82nd birthday, working as an independent contractor, although I've ratcheted down to part-time.