[neilv]

That Amazon characterization of a Principal Engineer is great, and approximately how I've viewed the ideal role of the title.

Sometimes the title means being very highly skilled and experienced IC, or having deep historical knowledge of a particular system or organization, or being a niche technical expert. I like what Amazon's description adds to it expressly (which many have sometimes done unofficially), such as leading by example, engaging, and seeing humility as a quality of the role.