My Backend Debugging Workflow

My rule is simple: reproduce first, patch second. I create the smallest failing scenario possible and write down expected versus actual behavior. This prevents random fixes and gives a clear path to verification.

Then I trace execution boundaries in order: input validation, service layer, data fetch, transformation, and output. Most issues appear where assumptions cross boundaries, not inside the most complicated function.

After fixing, I like to add one guard test for the exact bug and one neighboring case. This protects the area from regressions while keeping test maintenance light.