Remote work helps a lot in that case. I got my current remote job, which was specifically advertising for young developers, without mentioning my age. They know I'm an old fogey now, but that was after I had proven myself.

Yes, I had to severely abbreviate my resume. But no misinformation passed my lips or fingertips. The insurance paperwork, with age related info, all went through a third party.

And working remotely suits me down to the toes. On the internet nobody has to know you're a dog.