Kellan Elliott-McCrea, the CTO of Etsy for my entire time at the company, writes about the theories under which Etsy’s engineering team, as we know it, was constructed. It has traveled a whole lot further than he could have predicted:

Five years ago, continuous deployment was still a heretical idea. The idea you could do it with over 250 engineers was, to me at least, literally unimaginable.

Etsy has been the validation of many theories that still must seem heretical to many people, and I want to thank Kellan for the part he’s played in formulating them and seeing them tested in production.