Day one at a new job. The codebase has 500 files, no clear structure, and every file seems to call ten others. You are assigned a tiny task: change one payment rule. You spend the morning afraid to touch anything, https://udemylowleveldesignjava978785.realstoriesblog.com/623700/the-crucial-role-of-low-level-design-lld-in-software-engineering