Balancing Building and Doing LeetCode

if youre getting atleast 1 high quality interview or 2 meh interviews for every 300 apps, I would focus on leetcode. if youve applied to 500+ jobs and not a single interview then I would build. Also depends on your YoE. if you have >1 YoE I would skew more to leetcode. Lesser building

it takes months of prep to get to a point where youre leetcode ready. Even if youre building side projects my advice is to make sure you dedicate atleast 30 mins/day to leetcode

I also think people vastly underestimate how many apps sent it takes to get interviews. Anything around 1% application to interview is normal