How Senior Engineers Actually Make Architecture Decisions
There is a version of architecture decision-making that gets written about in books. A senior engineer receives a well-scoped problem, thinks deeply, weighs trade-offs calmly, writes an ADR, and ships something that holds up for years.
That is not how it works in practice.
In practice, someone puts four options in a Slack thread at 4pm on a Tuesday and asks which one to go with. Or a team has already started building something and needs a retroactive justification. Or the decision feels urgent because a sprint deadline is approaching, but the real constraints are half-understood and nobody has had time to read the relevant documentation.
Senior engineers make architecture decisions under these conditions all the time. What separates the good ones from the rest is not a magical ability to see the future. It is a set of habits, questions, and instincts that produce consistently better choices without perfect...
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