I'll second this opinion. I drilled on Leetcode medium problems to address some deficiencies in a recent job search (whilst in my late 40s age-wise). It made

I'll second this opinion. I drilled on Leetcode medium problems to address some deficiencies in a recent job search (whilst in my late 40s age-wise). It made a huge difference in the interview outcomes, and I've found that I'm actually using this stuff designing solutions in my new job. Having a bunch of basic, generally useful algorithms in recent memory does save a lot of time on the "general solution" side when you're working in a new milieu. (That saved time then gets consumed trying to find, configure, and tune anything in an unfamiliar cloud environment, but that's another kettle of fish).