How Senior Engineers Actually Debug (It’s Not What You Think)

Senior engineers debug differently from juniors not because of speed or cleverness, but because of a disciplined, methodical approach. Key practices include starting with the system rather than the code, forming and disproving hypotheses, reliably reproducing bugs, leveraging observability tools, fixing root causes instead of symptoms, knowing when to stop investigating, and communicating throughout the process. The core insight is that debugging is a structured thinking process — narrowing the search space and understanding the system until the bug becomes obvious.