Ever wondered how you can release a new critical feature on a website that has more than 200 visitors at any given time? This is a story of how we released differently priced sizes on the largest fashion e-commerce website in Australia.

This was a feature that was on the critical path, with the use of feature flags and proper coordination, the feature was deployed and released with no downtime even if legacy (5+ years old) systems were heavily involved. You will learn the tips and tricks from the trenches to release even critical features on a popular website in this talk.