What is your strategy for overcoming ageism when searching for jobs?

Make use of ageism as a filter. Let’s explain: Teams that don’t respect age are a bunch of fools. The most important thing is your life experience, not your technological experience. It has taught you how to manage your time and your job, deal with others, approach clients or customers (internal or external), cope with difficult times in your life, and many more experiences that many youngsters don’t have.
Because of your age, younger uneducated people will reject you, and you’ll be appreciated by intelligent teams that respect your life experience.
Alright, what else can you do to get past that type of ageism? I’d suggest updating your software skills. Focus on your abilities and show them you can collaborate with others effectively. Also, don’t forget to mention your prior successes. It helps you a lot.