At The Knot Worldwide, we’ve been developing an in-house experimentation tool named “Gecko”. It is used to perform A/B testing at scale and thereby test and validate the improvements in our product innovations.

Together with Ángel Esquembre, I recently published an article about the architecture of Gecko, our team’s journey that culminated in this in-house tool, as well as the Bayesian analysis component I wrote for it that allows us to derive actionable insights from the experiments.