Great idea! The best two engineers I've had the pleasure to work with were both 45+ years old. They had a cool head when shit hit the fan, and were generally unfazed about technical problems. "Been there done that, let's do this right." If your company is discriminating against older engineers you're making a big mistake!
Now can we get a "no leetcode" job board? My favorite companies give you a take home, of a real world problem, vertical slice of what you're expected to do day to day.