The Force Multiplier
Staff+ engineers cost 20-40% more than senior engineers ($250-400K vs. $180-280K). But they: prevent $500K-1M architectural mistakes, accelerate team velocity by 20-30% through better patterns, reduce cross-team coordination cost by 15-25%, and mentor 3-5 senior engineers simultaneously.
ROI: the premium ($70-120K extra compensation) generates $500K-1.5M in value. Hire your first staff engineer when you have 15-20 engineers.