It's not ageist. It doesn't say People who are 50 need not apply. From reading this job posting, someone who is 80, worked as a mechanic, a waiter, a clerk, and then picked up some newfangled technology might qualify.
Besides the whole Agile not being codified for more than 12 years thing, if you've been out of the loop managing for 12 years, they say they don't want you. Part of the process apparently involves showing that your technical skills are still there.
As i posted above... Lightweight processes were discussed as alternatives to waterfall way back in the 90s during my software engineering courses. "Rapid application development" and RAtional unified process were the "hot" lightweight methodologies when I started work in 1996. Scrum has been with us since 1995.
And yes, it's blatantly ageist... It falls under the disparate impact provision:
"In addition to prohibiting intentional discrimination against older workers (known as “disparate treatment”), the ADEA prohibits practices that, although facially neutral with regard to age, have the effect of harming older workers more than younger workers (known as “disparate impact”), unless the employer can show that the practice is based on an RFOA."
Besides the whole Agile not being codified for more than 12 years thing, if you've been out of the loop managing for 12 years, they say they don't want you. Part of the process apparently involves showing that your technical skills are still there.