Fun Fact: When I was working at Amazon, I had seniority over Jeff Bezos.

snapster thought this was worth mentioning said
15

When Amazon acquired Woot, it also acquired the merged Synapse Micro Inc. entity history (I merged the two in 2005). This seemed to come as a surprise finding to the attorneys but it was too late to change the transaction style and likely didn't matter much (earliest dates are used for IRS R&D tax credit baseline purposes, maybe that was all). I started and incorporated Synapse Micro Inc. in February 1994, a month before Bezos incorporated. Does this make me employee #1?

TL:DR; 20 years ago I started a business that became Amazon.com