> For big companies you need to drill LeetCode and system design. Perhaps for startups it is not the worst use of your time.
Exactly. Any hiring manager with a brain and not bound my clueless corporate processes would use OSS contributions are a decent signal for proficiency and social skills.
That means nothing in a big corp though. The hiring panel will never accept a candidate that fails the Leetc0d3 test because that means other panels could do the same and then it all falls apart for them. Status quo and all.