How is a Staff Engineer’s success primarily measured, especially in contrast to a Senior Engineer's output?

Answer

By how much better they make other teams perform through cross-pollination of skills and guidance

A key differentiator is the Staff Engineer's organizational multiplier effect; their success is gauged by how much they improve the performance of other teams through tooling, architectural guidance, and cross-pollination of skills, rather than just their own team's output.

How is a Staff Engineer’s success primarily measured, especially in contrast to a Senior Engineer's output?
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