Discover how to build an A/B testing system from the ground up in this 32-minute conference talk from the Data Science Festival. Learn essential components such as bucketing, splitting, and feature toggling while avoiding common pitfalls. Gain valuable insights for data analysts, data scientists, and developers to implement a successful A/B testing system that drives business growth. Explore the process of creating data-driven decision-making tools for websites, apps, and products, even with limited resources and technical expertise. Presented at the 2023 MayDay Data Science Festival in London, this talk offers practical knowledge for organizations looking to enhance their product development through effective A/B testing strategies.