How to Know You’ve Become a Senior Programmer

Senior programmers are described as people whose caution grows with experience. They test more, write documentation, do code reviews, and think through the impacts of each change, even when that makes delivery slower.

Reading notes

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• The author says they used to change code quickly to satisfy the client first, and only later worry about maintainability and the quality of the choice.
• With time, they began using tests, writing documentation, and doing code reviews to understand past decisions and improve maintenance.
• This slower process means a change that once took minutes can now take a day because it requires impact analysis, automated tests, manual tests, documentation, merging, and build verification.
• Senior programmers are presented as more careful, not malicious, because they know how a small change can cause larger problems.
• The text links this caution to software lifecycle and team turnover: when people leave, product knowledge is lost and interventions become more costly, longer, and riskier.
• When changes are rare, programmers may forget the reasons behind older code and need to review it again before modifying it.
• The article says every change alters both the code and its context, so the same line is never truly the same after edits.
• In the bank example, a production operating system and firmware update caused five days of instability because testing, rollback readiness, and disaster recovery were insufficient.
• Outside the project, people often expect changes immediately and do not see how even a small modification can create wider problems.
• More experienced programmers are said to evaluate changes more carefully because they understand product knowledge, code understanding, and possible consequences better.
• The conclusion is that a senior programmer may refuse a change because the risks are too high or because doing it properly would take too much time and resources.
• The text asks readers to see this caution as awareness, not incapacity, and to weigh risks and benefits before changing a project.