The days after Thanksgiving are very busy for Glossier when we serve 100 times our typical traffic volume. I recently gave a conference talk about how our team prepared for Black Friday. tl;dr: It mostly went well, except for the time when the site crashed. But it crashed in the ways we’d predicted, and we learned a ton! Check out how we prepared for peak traffic, our surprises and lessons learned, and how we’re building ever more scalable, reliable systems to support Glossier in 2019 and beyond: