TL;DR Sometimes we cannot estimate the required sample size needed to power an experiment before starting it....

TL;DR We summarize the findings in our recent paper, , where we explain how Spotify’s decision-making engine...

When we want to determine the causal effect of a product or business change at Spotify, A/B testing is the...

At Spotify, . Most of these tests follow a standard design, where we assign users randomly to control and...

As companies mature, it’s easy to believe that the core experience and most user needs have been resolved,...

TL;DR: Spotify is releasing a new commercial product for software development teams: a version of our...

In of this series, we introduced the within-unit peeking problem that we call the “peeking problem 2.0”. We...

At Spotify, we’re constantly improving our data infrastructure, which means we can get feedback on...

At Spotify, we use messaging to communicate with our listeners all over the world. Our Messaging team powers...

In the fast-paced world of streaming, personalization plays a vital role in enhancing user experiences. At...

TL;DR Sequential tests are the bread and butter for any company conducting online experiments. The literature...

TL;DR: Using the properties of the Poisson bootstrap algorithm and quantile estimators, we have been able to...